Rotary tool

Claim 2

A rotary tool comprising an input shaft and an output shaft, overload clutch means between said input and output shafts for selectively drivingly connecting and disconnecting said input and output shafts, said overload clutch means drivingly connecting said input and output shafts upon relatively low load conditions of said output shaft to effect a predetermined drive ratio between said input and output shafts, first and second reduction gear means between said input and output shafts for selectively varying said predetermined drive ratio upon an increase load condition of said output shaft to decrease output shaft speed and increase output shaft torque, said overload clutch means drivingly disconnecting said input and output shafts upon an increase load condition of said output shaft and overrunning clutch means between said first and second reduction gear means for drivingly connecting said first and second reduction gear means upon said overload clutch means drivingly disconnecting said input and output shafts whereby said output shaft is driven through said first and second reduction gear means from said input shaft to thereby decrease output shaft speed and increase output shaft torque, said overrunning clutch means includes first and second overrunning clutch members coupled to the respective first and second reduction gear means, said first overrunning clutch member being in driving relationship to said input shaft through said first reduction gear means, said first and second overrunning clutch members being drivingly connected upon said input shaft speed being greater than said output shaft speed, said first and second overrunning clutch members have surface portions in generally spaced telescopic coaxial relationship with clutch elements disposed therebetween, a first of said surface portions being generally cylindrical, and a second of said surface portions having a plurality of flats whereby the location of said clutch elements relative to said cylinder and flats effects the engagement and disengagement of said first and second overrunning clutch members.

Claim 3

A rotary tool comprising an input shaft and an output shaft, overload clutch means between said input and output shafts for selectively drivingly connecting and disconnecting said input and output shafts, said overload clutch means drivingly connecting said input and output shafts upon relatively low load conditions of said output shaft to effect a predetermined drive ratio between said input and output shafts, first and second reduction gear means between said input and output shafts for selectively varying said predetermined drive ratio upon an increase load condition of said output shaft to decrease output shaft speed and increase output shaft torque, said overload clutch means drivingly disconnecting said input and output shafts upon an increase load condition of said output shaft and overrunning clutch means between said first and second reduction gear means for drivingly connecting said first and second reduction gear means upon said overload clutch means drivingly disconnecting said input and output shafts whereby said output shaft is driven through said first and second reduction gear means from said input shaft to thereby decrease output shaft speed and increase output shaft torque, said overrunning clutch means includes first and second overrunning clutch members coupled to the respective first and second reduction gear means, said first overrunning clutch member being in driving relationship to said input shaft through said first reduction gear means, said first and second overrunning clutch members being drivingly connected upon said input shaft speed being greater than said output shaft speed, and means for fluidically disengaging the drive connection of said overload clutch means.

Claim 4

A rotary tool comprising an input shaft and an output shaft, overload clutch means between said input and output shafts for selectively drivingly connecting and disconnecting said input and output shafts, said overload clutch means drivingly connecting said input and output shafts upon relatively low load conditions of said output shaft to effect a predetermined drive ratio between said input and output shafts, first and second reduction gear means between said input and output shafts for selectively varying said predetermined drive ratio upon an increase load condition of said output shaft to decrease output shaft speed and increase output shaft torque, said overload clutch means drivingly disconnecting said input and output shafts upon an increase load condition of said output shaft and overrunning clutch means between said first and second reduction gear means for drivingly connecting said first and second reduction gear means upon said overload clutch means drivingly disconnecting said input and output shafts whereby said output shaft is driven through said first and second reduction gear means from said input shaft to thereby decrease output shaft speed and increase output shaft torque, said overrunning clutch means includes first and second overrunning clutch members coupled to the respective first and second reduction gear means, said first overrunning clutch member being in driving relationship to said input shaft through said first reduction gear means, said first and second overrunning clutch members being drivingly connected upon said input shaft speed being greater than said output shaft speed, and means for fluidically disengaging the drive connection of said overload clutch means.

Claim 5

A rotary tool comprising an input shaft and an output shaft, overload clutch means between said input and output shafts for selectively drivingly connecting and disconnecting said input and output shafts, said overload clutch means drivingly connecting said input and output shafts upon relatively low load conditions of said output shaft to effect a predetermined drive ratio between said input and output shafts, first and second reduction gear means between said input and output shafts for selectively varying said predetermined drive ratio upon an increase load condition of said output shaft to decrease output shaft speed and increase output shaft torque, said overload clutch means drivingly disconnecting said input and output shafts upon an increase load condition of said output shaft and overrunning clutch means between said first and second reduction gear means for drivingly connecting said first and second reduction gear means upon said overload clutch means drivingly disconnecting said input and output shafts whereby said output shaft is driven through said first and second reduction gear means from said input shaft to thereby decrease output shaft speed and increase output shaft torque, said overrunning clutch means includes first and second overrunning clutch members coupled to the respective first and second reduction gear means, said first overrunning clutch member being in driving relationship to said input shaft through said first reduction gear means, said first and second overrunning clutch members being drivingly connected upon said input shaft speed being greater than said output shaft speed, spring biasing means for engaging the driving connection of said overload clutch means, and means for fluidically disengaging said spring biasing means to disengage the driving connection of said overload clutch means.

Claim 6

A rotary tool comprising an input shaft and an output shaft, overload clutch means between said input and output shafts for selectively drivingly connecting and disconnecting said input and output shafts, said overload clutch means drivingly connecting said input and output shafts upon relatively low load conditions of said output shaft to effect a predetermined drive ratio between said input and output shafts, first and second reduction gear means between said input and output shafts for selectively varying said predetermined drive ratio upon an increase load condition of said output shaft to decrease output shaft speed and increase output shaft torque, said overload clutch means drivingly disconnecting said input and output shafts upon an increase load condition of said output shaft and overrunning clutch means between said first and second reduction gear means for drivingly connecting said first and second reduction gear means upon said overload clutch means drivingly disconnecting said input and output shafts whereby said output shaft is driven through said first and second reduction gear means from said input shaft to thereby decrease output shaft speed and increase output shaft torque, said overrunning clutch means includes first and second overrunning clutch members coupled to the respective first and second reduction gear means, said first overrunning clutch member being in driving relationship to said input shaft through said first reduction gear means, said first and second overrunning clutch members being drivingly connected upon said input shaft speed being greater than said output shaft speed, spring biasing means for engaging the driving connection of said overload clutch means, and means for fluidically disengaging said spring biasing means to disengage the driving connection of said overload clutch means.

Claim 7

A rotary tool comprising an input shaft and an output shaft, overload clutch means between said input and output shafts for selectively drivingly connecting and disconnecting said input and output shafts, said overload clutch means drivingly connecting said input and output shafts upon relatively low load conditions of said output shaft to effect a predetermined drive ratio between said input and output shafts, first and second reduction gear means between said input and output shafts for selectively varying said predetermined drive ratio upon an increase load condition of said output shaft to decrease output shaft speed and increase output shaft torque, said overload clutch means drivingly disconnecting said input and output shafts upon an increase load condition of said output shaft and overrunning clutch means between said first and second reduction gear means for drivingly connecting said first and second reduction gear means upon said overload clutch means drivingly disconnecting said input and output shafts whereby said output shaft is driven through said first and second reduction gear means from said input shaft to thereby decrease output shaft speed and increase output shaft torque, said overrunning clutch means includes first and second overrunning clutch members coupled to the respective first and second reduction gear means, said first overrunning clutch member being in driving relationship to said input shaft through said first reduction gear means, said first and second overrunning clutch members being drivingly connected upon said input shaft speed being greater than said output shaft speed, spring biasing means for engaging the driving connection of said overload clutch means, means for fluidically disengaging said spring biasing means to disengage the driving connection of said overload clutch means, said overload clutch means include first and second clutch plates carried respectively by said output shaft and said input shaft, a plurality of clutch elements between said plates, said spring biasing means being effective for urging said clutch plates into cooperative driving engagement through said clutch elements, and said fluidic disengaging means being effective for urging said clutch plates apart against the force of said spring biasing means.

Claim 8

A rotary tool comprising an input shaft and an output shaft, overload clutch means between said input and output shafts for selectively drivingly connecting and disconnecting said input and output shafts, said overload clutch means drivingly connecting said input and output shafts upon relatively low load conditions of said output shaft to effect a predetermined drive ratio between said input and output shafts, first and second reduction gear means between said input and output shafts for selectively varying said predetermined drive ratio upon an increase load condition of said output shaft to decrease output shaft speed and increase output shaft torque, said overload clutch means drivingly disconnecting said input and output shafts upon an increase load condition of said output shaft and overrunning clutch means between said first and second reduction gear means for drivingly connecting said first and second reduction gear means upon said overload clutch means drivingly disconnecting said input and output shafts whereby said output shaft is driven through said first and second reduction gear means from said input shaft to thereby decrease output shaft speed and increase output shaft torque, said overrunning clutch means includes first and second overrunning clutch members coupled to the respective first and second reduction gear means, said first overrunning clutch member being in driving relationship to said input shaft through said first reduction gear means, said first and second overrunning clutch members being drivingly connected upon said input shaft speed being greater than said output shaft speed, spring biasing means for engaging the driving connection of said overload clutch means, means for fluidically disengaging said spring biasing means to disengage the driving connection of said overload clutch means, said overload clutch means include first and second clutch plates carried respectively by said output shaft and said input shaft, a plurality of clutch elements between said plates, said spring biasing means being effective for urging said clutch plates into cooperative driving engagement through said clutch elements, and said fluidic disengaging means being effective for urging said clutch plates apart against the force of said spring biasing means.

Claim 9

A rotary tool comprising an input shaft and an output shaft, overload clutch means between said input and output shafts for selectively drivingly connecting and disconnecting said input and output shafts, said overload clutch means drivingly connecting said input and output shafts upon relatively low load conditions of said output shaft to effect a predetermined drive ratio between said input and output shafts, first and second reduction gear means between said input and output shafts for selectively varying said predetermined drive ratio upon an increase load condition of said output shaft to decrease output shaft speed and increase output shaft torque, said overload clutch means drivingly disconnecting said input and output shafts upon an increase load condition of said output shaft and overrunning clutch means between said first and second reduction gear means for drivingly connecting said first and second reduction gear means upon said overload clutch means drivingly disconnecting said input and output shafts whereby said output shaft is driven through said first and second reduction gear means from said input shaft to thereby decrease output shaft speed and increase output shaft torque, said overrunning clutch means includes first and second overrunning clutch members coupled to the respective first and second reduction gear means, said first overrunning clutch member being in driving relationship to said input shaft through said first reduction gear means, said first and second overrunning clutch members being drivingly connected upon said input shaft speed being greater than said output shaft speed, means for fluidically disengaging the driving connection of said overload clutch, fluidic motor means for driving said input shaft, and means responsive to a pressure drop caused by resistance to the driving of said fluidic motor means for discontinuing the operation of said fluid disengaging means whereby said output shaft is driven by said input shaft through said overload clutch means.

Claim 10

A rotary tool comprising an input shaft and an output shaft, overload clutch means between said input and output shafts for selectively drivingly connecting and disconnecting said input and output shafts, said overload clutch means drivingly connecting said input and output shafts upon relatively low load conditions of said output shaft to effect a predetermined drive ratio between said input and output shafts, first and second reduction gear means between said input and output shafts for selectively varying said predetermined drive ratio upon an increase load condition of said output shaft to decrease output shaft speed and increase output shaft torque, said overload clutch means drivingly disconnecting said input and output shafts upon an increase load condition of said output shaft and overrunning clutch means between said first and second reduction gear means for drivingly connecting said first and second reduction gear means upon said overload clutch means drivingly disconnecting said input and output shafts whereby said output shaft is driven through said first and second reduction gear means from said input shaft to thereby decrease output shaft speed and increase output shaft torque, said overrunning clutch means includes first and second overrunning clutch members coupled to the respective first and second reduction gear means, said first overrunning clutch member being in driving relationship to said input shaft through said first reduction gear means, said first and second overrunning clutch members being drivingly connected upon said input shaft speed being greater than said output shaft speed, means for fluidically disengaging the driving connection of said overload clutch, fluidic motor means for driving said input shaft, and means responsive to a pressure drop caused by resistance to the driving of said fluidic motor means for discontinuing the operation of said fluid disengaging means whereby said output shaft is driven by said input shaft through said overload clutch means.

Claim 11

A rotary tool comprising an input shaft and an output shaft, overload clutch means between said input and output shafts for selectively drivingly connecting and disconnecting said input and output shafts, said overload clutch means drivingly connecting said input and output shafts upon relatively low load conditions of said output shaft to effect a predetermined drive ratio between said input and output shafts, first and second reduction gear means between said input and output shafts for selectively varying said predetermined drive ratio upon an increase load condition of said output shaft to decrease output shaft speed and increase output shaft torque, said overload clutch means drivingly disconnecting said input and output shafts upon an increase load condition of said output shaft and overrunning clutch means between said first and second reduction gear means for drivingly connecting said first and second reduction gear means upon said overload clutch means drivingly disconnecting said input and output shafts whereby said output shaft is driven through said first and second reduction gear means from said input shaft to thereby decrease output shaft speed and increase output shaft torque, said overrunning clutch means includes first and second overrunning clutch members coupled to the respective first and second reduction gear means, said first overrunning clutch member being in driving relationship to said input shaft through said first reduction gear means, said first and second overrunning clutch members being drivingly connected upon said input shaft speed being greater than said output shaft speed, said first and second reduction gear means are planetary gear sets each including a sun gear and planet gears carried by a cage, and said overrunning clutch means is coupled between the planet cage of one said first and second reduction gear means and the sun gear of the other of said first and second reduction gear means.

Claim 12

A rotary tool comprising an input shaft and an output shaft, overload clutch means between said input and output shafts for selectively drivingly connecting and disconnecting said input and output shafts, said overload clutch means drivingly connecting said input and output shafts upon relatively low load conditions of said output shaft to effect a predetermined drive ratio between said input and output shafts, first and second reduction gear means between said input and output shafts for selectively varying said predetermined drive ratio upon an increase load condition of said output shaft to decrease output shaft speed and increase output shaft torque, said overload clutch means drivingly disconnecting said input and output shafts upon an increase load condition of said output shaft and overrunning clutch means between said first and second reduction gear means for drivingly connecting said first and second reduction gear means upon said overload clutch means drivingly disconnecting said input and output shafts whereby said output shaft is driven through said first and second reduction gear means from said input shaft to thereby decrease output shaft speed and increase output shaft torque, said overrunning clutch means includes first and second overrunning clutch members coupled to the respective first and second reduction gear means, said first overrunning clutch member being in driving relationship to said input shaft through said first reduction gear means, said first and second overrunning clutch members being drivingly connected upon said input shaft speed being greater than said output shaft speed, said first and second reduction gear means are planetary gear sets each including a sun gear and planet gears carried by a cage, and said overrunning clutch means is coupled between the planet cage of one said first and second reduction gear means and the sun gear of the other of said first and second reduction gear means.

Claim 13

A rotary tool comprising an input shaft and an output shaft, overload clutch means between said input and output shafts for selectively drivingly connecting and disconnecting said input and output shafts, said overload clutch means drivingly connecting said input and output shafts upon relatively low load conditions of said output shaft to effect a predetermined drive ratio between said input and output shafts, first and second reduction gear means between said input and output shafts for selectively varying said predetermined drive ratio upon an increase load condition of said output shaft to decrease output shaft speed and increase output shaft torque, said overload clutch means drivingly disconnecting said input and output shafts upon an increase load condition of said output shaft and overrunning clutch means between said first and second reduction gear means for drivingly connecting said first and second reduction gear means upon said overload clutch means drivingly disconnecting said input and output shafts whereby said output shaft is driven through said first and second reduction gear means from said input shaft to thereby decrease output shaft speed and increase output shaft torque, said overrunning clutch means includes first and second overrunning clutch members coupled to the respective first and second reduction gear means, said first overrunning clutch member being in driving relationship to said input shaft through said first reduction gear means, said first and second overrunning clutch members being drivingly connected upon said input shaft speed being greater than said output shaft speed, said first and second reduction gear means are planetary gear sets each including a sun gear and planet gears carried by a cage, said overrunning clutch means is coupled between the planet cage of one of said first and second reduction gear means and the sun gear of the other of said first and second reduction gear means, and the planet cage of said other first and second reduction gear means is fixedly carried by said output shaft.

Claim 14

A rotary tool comprising an input shaft and an output shaft, overload clutch means between said input and output shafts for selectively drivingly connecting and disconnecting said input and output shafts, said overload clutch means drivingly connecting said input and output shafts upon relatively low load conditions of said output shaft to effect a predetermined drive ratio between said input and output shafts, first and second reduction gear means between said input and output shafts for selectively varying said predetermined drive ratio upon an increase load condition of said output shaft to decrease output shaft speed and increase output shaft torque, said overload clutch means drivingly disconnecting said input and output shafts upon an increase load condition of said output shaft and overrunning clutch means between said first and second reduction gear means for drivingly connecting said first and second reduction gear means upon said overload clutch means drivingly disconnecting said input and output shafts whereby said output shaft is driven through said first and second reduction gear means from said input shaft to thereby decrease output shaft speed and increase output shaft torque, said overrunning clutch means includes first and second overrunning clutch members coupled to the respective first and second reduction gear means, said first overrunning clutch member being in driving relationship to said input shaft through said first reduction gear means, said first and second overrunning clutch members being drivingly connected upon said input shaft speed being greater than said output shaft speed, said first and second reduction gear means are planetary gear sets each including a sun gear and planet gears carried by a cage, said overrunning clutch means is coupled between the planet cage of one of said first and second reduction gear means and the sun gear of the other of said first and second reduction gear means, and the planet cage of said other first and second reduction gear means is fixedly carried by said output shaft.

Claim 15

The rotary tool as defined in claim 1 wherein said overload clutch means includes first and second clutch plates carried respectively by said output shaft and said input shaft, a plurality of clutch elements between said plates, and means biasingly urging said plates into cooperative driving engagement through said clutch elements.

Claim 16

The rotary tool as defined in claim 1 including means for fluidically disengaging the driving connection of said overload clutch means.

Claim 17

The rotary tool as defined in claim 1 including spring biasing means for engaging the driving connection of said overload clutch means, and means for fluidically disengaging said spring biasing means to disengage the driving connection of said overload clutch means.

Claim 18

The rotary tool as defined in claim 1 including spring biasing means for engaging the driving connection of said overload clutch means, means for fluidically disengaging said spring biasing means to disengage the driving connection of said overload clutch means, said overload clutch means include first and second clutch plates carried respectively by said output shaft and said input shaft, a plurality of clutch elements between said plates, said spring biasing means being effective for urging said clutch plates into cooperative driving engagement through said clutch elements, and said fluidic disengaging means being effective for urging said clutch plates apart against the force of said spring biasing means.

Claim 19

The rotary tool as defined in claim 1 including means for fluidically disengaging the driving connection of said overload clutch, fluidic motor means for driving said input shaft, and means responsive to a pressure drop caused by resistance to the driving of said fluidic motor means for discontinuing the operation of said fluidic disengaging means whereby said output shaft is driven by said input shaft through said overload clutch means.

Claim 20

The rotary tool as defined in claim 1 wherein said first and second reduction gear means are planetary gear sets each including a sun gear and planet gears carried by a cage, and said overrunning clutch means is coupled between the planet cage of one said first and second reduction gear means and the sun gear of the other of said first and second reduction gear means.

Claim 21

A rotary tool comprising an input shaft and an output shaft, overload clutch means between said input and output shafts for selectively drivingly connecting and disconnecting said input and output shafts, said overload clutch means drivingly connecting said input and output shafts upon relatively low load conditions of said output shaft to effect a predetermined drive ratio between said input and output shafts, first and second reduction gear means between said input and output shafts for selectively varying said predetermined drive ratio upon an increase load condition of said output shaft to decrease output shaft speed and increase output shaft torque, said overload clutch means drivingly disconnecting said input and output shafts upon an increase load condition of said output shaft and overrunning clutch means between said first and second reduction gear means for drivingly connecting said first and second reduction gear means upon said overload clutch means drivingly disconnecting said input and output shafts whereby said output shaft is driven through said first and second reduction gear means from said input shaft to thereby decrease output shaft speed and increase output shaft torque, said overrunning clutch means includes first and second overrunning clutch members coupled to the respective first and second reduction gear means, said first overrunning clutch member being in driving relationship to said input shaft through said first reduction gear means, said first and second overrunning clutch members being drivingly connected upon said input shaft speed being greater than said output shaft speed, said overload clutch means includes first and second clutch plates carried respectively by said output shaft and said input shaft, a plurality of clutch elements between said plates, means biasingly urging said plates into cooperative driving engagement through said clutch elements, and means for fluidically disengaging the driving connection of said overload clutch.

Claim 22

A rotary tool comprising an input shaft and an output shaft, overload clutch means between said input and output shafts for selectively drivingly connecting and disconnecting said input and output shafts, said overload clutch means drivingly connecting said input and output shafts upon relatively low load conditions of said output shaft to effect a predetermined drive ratio between said input and output shafts, first and second reduction gear means between said input and output shafts for selectively varying said predetermined drive ratio upon an increase load condition of said output shaft to decrease output shaft speed and increase output shaft torque, said overload clutch means drivingly disconnecting said input and output shafts upon an increase load condition of said output shaft and overrunning clutch means between said first and second reduction gear means for drivingly connecting said first and second reduction gear means upon said overload clutch means drivingly disconnecting said input and output shafts whereby said output shaft is driven through said first and second reduction gear means from said input shaft to thereby decrease output shaft speed and increase output shaft torque, said overrunning clutch means includes first and second overrunning clutch members coupled to the respective first and second reduction gear means, said first overrunning clutch member being in driving relationship to said input shaft through said first reduction gear means, said first and second overrunning clutch members being drivingly connected upon said input shaft speed being greater than said output shaft speed, said overload clutch means includes first and second clutch plates carried respectively by said output shaft and said input shaft, a plurality of clutch elements between said plates, means biasingly urging said plates into cooperative driving engagement through said clutch elements, and means for fluidically disengaging the driving connection of said overload clutch.

Claim 23

A rotary tool comprising an input shaft and an output shaft, overload clutch means between said input and output shafts for selectively drivingly connecting and disconnecting said input and output shafts, said overload clutch means drivingly connecting said input and output shafts upon relatively low load conditions of said output shaft to effect a predetermined drive ratio between said input and output shafts, first and second reduction gear means between said input and output shafts for selectively varying said predetermined drive ratio upon an increase load condition of said output shaft to decrease output shaft speed and increase output shaft torque, said overload clutch means drivingly disconnecting said input and output shafts upon an increase load condition of said output shaft and overrunning clutch means between said first and second reduction gear means for drivingly connecting said first and second reduction gear means upon said overload clutch means drivingly disconnecting said input and output shafts whereby said output cshaft is driven through said first and second reduction gear means from said input shaft to thereby decrease output shaft speed and increase output shaft torque, said overrunning clutch means includes first and second overrunning clutch members coupled to the respective first and second reduction gear means, said first overrunning clutch member being in driving relationship to said input shaft through said first reduction gear means, said first and second overrunning clutch members being drivingly connected upon said input shaft speed being greater than said output shaft speed, said overload clutch means includes first and second clutch plates carried respectively by said output shaft and said input shaft, a plurality of clutch elements between said plates, means biasingly urging said plates into cooperative driving engagement through said clutch elements, spring biasing means for engaging the driving connection of said overload clutch means, and means for fluidically disengaging said spring biasing means to disengage the driving connection of said overload clutch means.

Claim 24

A rotary tool comprising an input shaft and an output shaft, overload clutch means between said input and output shafts for selectively drivingly connecting and disconnecting said input and output shafts, said overload clutch means drivingly connecting said input and output shafts upon relatively low load conditions of said output shaft to effect a predetermined drive ratio between said input and output shafts, first and second reduction gear means between said input and output shafts for selectively varying said predetermined drive ratio upon an increase load condition of said output shaft to decrease output shaft speed and increase output shaft torque, said overload clutch means drivingly disconnecting said input and output shafts upon an increase load condition of said output shaft and overrunning clutch means between said first and second reduction gear means for drivingly connecting said first and second reduction gear means upon said overload clutch means drivingly disconnecting said input and output shafts whereby said output cshaft is driven through said first and second reduction gear means from said input shaft to thereby decrease output shaft speed and increase output shaft torque, said overrunning clutch means includes first and second overrunning clutch members coupled to the respective first and second reduction gear means, said first overrunning clutch member being in driving relationship to said input shaft through said first reduction gear means, said first and second overrunning clutch members being drivingly connected upon said input shaft speed being greater than said output shaft speed, said overload clutch means includes first and second clutch plates carried respectively by said output shaft and said input shaft, a plurality of clutch elements between said plates, means biasingly urging said plates into cooperative driving engagement through said clutch elements, spring biasing means for engaging the driving connection of said overload clutch means, and means for fluidically disengaging said spring biasing means to disengage the driving connection of said overload clutch means.

Claim 25

A rotary tool comprising an input shaft and an output shaft, overload clutch means between said input and output shafts for selectively drivingly connecting and disconnecting said input and output shafts, said overload clutch means drivingly connecting said input and output shafts upon relatively low load conditions of said output shaft to effect a predetermined drive ratio between said input and output shafts, first and second reduction gear means between said input and output shafts for selectively varying said predetermined drive ratio upon an increase load condition of said output shaft to decrease output shaft speed and increase output shaft torque, said overload clutch means drivingly disconnecting said input and output shafts upon an increase load condition of said output shaft and overrunning clutch means between said first and second reduction gear means for drivingly connecting said first and second reduction gear means upon said overload clutch means drivingly disconnecting said input and output shafts whereby said output shaft is driven through said first and second reduction gear means from said input shaft to thereby decrease output shaft speed and increase output shaft torque, said overrunning clutch means includes first and second overrunning clutch members coupled to the respective first and second reduction gear means, said first overrunning clutch member being in driving relationship to said input shaft through said first reduction gear means, said first and second overrunning clutch members being drivingly connected upon said input shaft speed being greater than said output shaft speed, said overload clutch means includes first and second clutch plates carried respectively by said output shaft and said input shaft, a plurality of clutch elements between said plates, means biasingly urging said plates into cooperative driving engagement through said clutch elements, spring biasing means for engaging the driving connection of said overload clutch means, means for fluidically disengaging said spring biasing means to disengage the driving connection of said overload clutch means, said overload clutch means include first and second clutch plates carried respectively by said output shaft and said input shaft, a plurality of clutch elements between said plates, said spring biasing means being effective for urging said clutch plates into cooperative driving engagement through said clutch elements, and said fluidic disengaging means being effective for urging said clutch plates apart against the force of said spring biasing means.

Claim 26

A rotary tool comprising an input shaft and an output shaft, overload clutch means between said input and output shafts for selectively drivingly connecting and disconnecting said input and output shafts, said overload clutch means drivingly connecting said input and output shafts upon relatively low load conditions of said output shaft to effect a predetermined drive ratio between said input and output shafts, first and second reduction gear means between said input and output shafts for selectively varying said predetermined drive ratio upon an increase load condition of said output shaft to decrease output shaft speed and increase output shaft torque, said overload clutch means drivingly disconnecting said input and output shafts upon an increase load condition of said output shaft and overrunning clutch means between said first and second reduction gear means for drivingly connecting said first and second reduction gear means upon said overload clutch means drivingly disconnecting said input and output shafts whereby said output shaft is driven through said first and second reduction gear means from said input shaft to thereby decrease output shaft speed and increase output shaft torque, said overrunning clutch means includes first and second overrunning clutch members coupled to the respective first and second reduction gear means, said first overrunning clutch member being in driving relationship to said input shaft through said first reduction gear means, said first and second overrunning clutch members being drivingly connected upon said input shaft speed being greater than said output shaft speed, said overload clutch means includes first and second clutch plates carried respectively by said output shaft and said input shaft, a plurality of clutch elements between said plates, means biasingly urging said plates into cooperative driving engagement through said clutch elements, spring biasing means for engaging the driving connection of said overload clutch means, means for fluidically disengaging said spring biasing means to disengage the driving connection of said overload clutch means, said overload clutch means include first and second clutch plates carried respectively by said output shaft and said input shaft, a plurality of clutch elements between said plates, said spring biasing means being effective for urging said clutch plates into cooperative driving engagement through said clutch elements, and said fluidic disengaging means being effective for urging said clutch plates apart against the force of said spring biasing means.

Claim 27

A rotary tool comprising an input shaft and an output shaft, overload clutch means between said input and output shafts for selectively drivingly connecting and disconnecting said input and output shafts, said overload clutch means drivingly connecting said input and output shafts upon relatively low load conditions of said output shaft to effect a predetermined drive ratio between said input and output shafts, first and second reduction gear means between said input and output shafts for selectively varying said predetermined drive ratio upon an increase load condition of said output shaft to decrease output shaft speed and increase output shaft torque, said overload clutch means drivingly disconnecting said input and output shafts upon an increase load condition of said output shaft and overrunning clutch means between said first and second reduction gear means for drivingly connecting said first and second reduction gear means upon said overload clutch means drivingly disconnecting said input and output shafts whereby said output shaft is driven through said first and second reduction gear means from said input shaft to thereby decrease output shaft speed and increase output shaft torque, said overrunning clutch means includes first and second overrunning clutch members coupled to the respective first and second reduction gear means, said first overrunning clutch member being in driving relationship to said input shaft through said first reduction gear means, said first and second overrunning clutch members being drivingly connected upon said input shaft speed being greater than said output shaft speed, said overload clutch means includes first and second clutch plates carried respectively by said output shaft and said input shaft, a plurality of clutch elements between said plates, means biasingly urging said plates into cooperative driving engagement through said clutch elements, means for fluidically disengaging the driving connection of said overload clutch, fluidic motor means for driving said input shaft, and means responsive to a pressure drop caused by resistance to the driving of said fluidic motor means for discontinuing the operation of said fluidic disengaging means whereby said output shaft is driven by said said input shaft through said overload clutch means.

Claim 28

A rotary tool comprising an input shaft and an output shaft, overload clutch means between said input and output shafts for selectively drivingly connecting and disconnecting said input and output shafts, said overload clutch means drivingly connecting said input and output shafts upon relatively low load conditions of said output shaft to effect a predetermined drive ratio between said input and output shafts, first and second reduction gear means between said input and output shafts for selectively varying said predetermined drive ratio upon an increase load condition of said output shaft to decrease output shaft speed and increase output shaft torque, said overload clutch means drivingly disconnecting said input and output shafts upon an increase load condition of said output shaft and overrunning clutch means between said first and second reduction gear means for drivingly connecting said first and second reduction gear means upon said overload clutch means drivingly disconnecting said input and output shafts whereby said output shaft is driven through said first and second reduction gear means from said input shaft to thereby decrease output shaft speed and increase output shaft torque, said overrunning clutch means includes first and second overrunning clutch members coupled to the respective first and second reduction gear means, said first overrunning clutch member being in driving relationship to said input shaft through said first reduction gear means, said first and second overrunning clutch members being drivingly connected upon said input shaft speed being greater than said output shaft speed, said overload clutch means includes first and second clutch plates carried respectively by said output shaft and said input shaft, a plurality of clutch elements between said plates, means biasingly urging said plates into cooperative driving engagement through said clutch elements, means for fluidically disengaging the driving connection of said overload clutch, fluidic motor means for driving said input shaft, and means responsive to a pressure drop caused by resistance to the driving of said fluidic motor means for discontinuing the operation of said fluidic disengaging means whereby said output shaft is driven by said said input shaft through said overload clutch means.

Claim 29

A rotary tool comprising an input shaft and an output shaft, overload clutch means between said input and output shafts for selectively drivingly connecting and disconnecting said input and output shafts, said overload clutch means drivingly connecting said input and output shafts upon relatively low load conditions of said output shaft to effect a predetermined drive ratio between said input and output shafts, first and second reduction gear means between said input and output shafts for selectively varying said predetermined drive ratio upon an increase load condition of said output shaft to decrease output shaft speed and increase output shaft torque, said overload clutch means drivingly disconnecting said input and output shafts upon an increase load condition of said output shaft and overrunning clutch means between said first and second reduction gear means for drivingly connecting said first and second reduction gear means upon said overload clutch means drivingly disconnecting said input and output shafts whereby said output shaft is driven through said first and second reduction gear means from said input shaft to thereby decrease output shaft speed and increase output shaft torque, said overrunning clutch means includes first and second overrunning clutch members coupled to the respective first and second reduction gear means, said first overrunning clutch member being in driving relationship to said input shaft through said first reduction gear means, said first and second overrunning clutch members being drivingly connected upon said input shaft speed being greater than said output shaft speed, said overload clutch means includes first and second clutch plates carried respectively by said output shaft and said input shaft, a plurality of clutch elements between said plates, means biasingly urging said plates into cooperative driving engagement through said clutch elements, said first and second reduction gear means are planetary gear sets each including a sun gear and planet gears carried by a cage, and said overrunning clutch means is coupled between the planet cage of one of said first and second reduction gear means and the sun gear of the other of said first and second reduction gear means.

Claim 30

A rotary tool comprising an input shaft and an output shaft, overload clutch means between said input and output shafts for selectively drivingly connecting and disconnecting said input and output shafts, said overload clutch means drivingly connecting said input and output shafts upon relatively low load conditions of said output shaft to effect a predetermined drive ratio between said input and output shafts, first and second reduction gear means between said input and output shafts for selectively varying said predetermined drive ratio upon an increase load condition of said output shaft to decrease output shaft speed and increase output shaft torque, said overload clutch means drivingly disconnecting said input and output shafts upon an increase load condition of said output shaft and overrunning clutch means between said first and second reduction gear means for drivingly connecting said first and second reduction gear means upon said overload clutch means drivingly disconnecting said input and output shafts whereby said output shaft is driven through said first and second reduction gear means from said input shaft to thereby decrease output shaft speed and increase output shaft torque, said overrunning clutch means includes first and second overrunning clutch members coupled to the respective first and second reduction gear means, said first overrunning clutch member being in driving relationship to said input shaft through said first reduction gear means, said first and second overrunning clutch members being drivingly connected upon said input shaft speed being greater than said output shaft speed, said overload clutch means includes first and second clutch plates carried respectively by said output shaft and said input shaft, a plurality of clutch elements between said plates, means biasingly urging said plates into cooperative driving engagement through said clutch elements, said first and second reduction gear means are planetary gear sets each including a sun gear and planet gears carried by a cage, and said overrunning clutch means is coupled between the planet cage of one of said first and second reduction gear means and the sun gear of the other of said first and second reduction gear means.

Claim 31

The rotary tool as defined in claim 5 wherein said first and second reduction gear means are planetary gear sets each including a sun gear and planet gears carried by a cage, and said overrunning clutch means is coupled between the planet cage of one said first and second reduction gear means and the sun gear of the other of said first and second reduction gear means.

Claim 32

The rotary tool as defined in claim 5 wherein said first and second reduction gear means are planetary gear sets each including a sun gear and planet gears carried by a cage, and said overrunning clutch means is coupled between the planet cage of one said first and second reduction gear means and the sun gear of the other of said first and second reduction gear means.

Claim 33

The rotary tool as defined in claim 8 including spring biasing means for engaging the driving connection of said overload clutch means, and means for fluidically disengaging said spring biasing means to disengage the driving connection of said overload clutch means.

Claim 34

The rotary tool as defined in claim 8 including spring biasing means for engaging the driving connection of said overload clutch means, means for fluidically disengaging said spring biasing means to disengage the driving connection of said overload clutch means, said overload clutch means include first and second clutch plates carried respectively by said output shaft and said input shaft, a plurality of clutch elements between said plates, said spring biasing means being effective for urging said clutch plates into cooperative driving engagement through said clutch elements and said fluidic disengaging means being effective for urging said clutch plates apart against the force of said spring biasing means.

Claim 35

The rotary tool as defined in claim 8 including means for fluidically disengaging the driving connection of said overload clutch, fluidic motor means for driving said input shaft, and means responsive to a pressure drop caused by resistance to the driving of said fluidic motor means for discontinuing the operation of said fluidic disengaging means whereby said output shaft is driven by said input shaft through said overload clutch means.

Claim 36

The rotary tool as defined in claim 8 wherein said first and second reduction gear means are planetary gear sets each including a sun gear and planet gears carried by a cage, and said overrunning clutch means is coupled between the planet cage of one said first and second reduction gear means and the sun gear of the other of said first and second reduction gear means.

Claim 37

The rotary tool as defined in claim 15 wherein said first and second reduction gear means are planetary gear sets each including a sun gear and planet gears carried by a cage, and said overrunning clutch means is coupled between the planet cage of one said first and second reduction gear means and the sun gear of the other of said first and second reduction gear means.