US3586115A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Two-speed dual drive stall torque nut running tool
Assignee: Chicago Pneumatic Tool Co LLC
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Filing: 1969-10-29
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Granted: 1971-06-22
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Expires: 1989-10-29
Abstract
Abstract A two-speed nut running tool having two separate air motors, one serving as a rundown motor; and the other as a torquing motor. Both motors are connected to a common output spindle through a common planetary gear system. The arrangement is such that the rundown motor drives the output spindle through a small gear reduction; and the torquing motor drives the spindle through a larger gear reduction. The motors operate concurrently in the same direction to drive the spindle. The rundown motor provides an initial tightness to the work determined by the limits of its capacity and then stalls. The concurrently running torquing motor thereafter continues to tighten the work through the gear system. When a reactionary torque develops through the gear system tending to rotate the rundown motor in a reverse direction from its stalled condition, a one-way clutch responds to this action to restrain such reverse rotation. This enables the torquing motor to continue its torque delivery to the work until it has reached the limit of its capacity and stalls. The stall torque capacity of the torquing motor represents the maximum value of final torque delivered to the work.
Inventors
- 👤 Lester A Amtsberg
- 👤 William K Wallace
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:53
CPC Classifications
B; B25; B25B; B25B21/00; B25B21/008
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
119 words
A two-speed dual drive stall torque nut running tool comprising a planetary gear system having an output spindle, a rundown air vane motor having a small gear reduction drive connection through the gear system with the spindle, a torquing motor separate from the rundown motor having a larger gear reduction drive connection through the gear system with the spindle, air feed means for causing pneumatic operation of both motors separately and concurrently in the same direction, and clutch means that is responsive to reactionary torque transmitted through the gear system back to the rundown motor to restrain the rundown motor against being rotated in a reverse direction by the gear system without interrupting continued operation of the torquing motor.
Claim 2
Dependent Claim
119 words
A two-speed dual drive stall torque nut running tool comprising a planetary gear system having an output spindle, a rundown air vane motor having a small gear reduction drive connection through the gear system with the spindle, a torquing motor separate from the rundown motor having a larger gear reduction drive connection through the gear system with the spindle, air feed means for causing pneumatic operation of both motors separately and concurrently in the same direction, and clutch means that is responsive to reactionary torque transmitted through the gear system back to the rundown motor to restrain the rundown motor against being rotated in a reverse direction by the gear system without interrupting continued operation of the torquing motor.
Claim 3
Dependent Claim
168 words
A two-speed dual drive stall torque nut running tool including an air vane rundown motor carrying a ring gear by means of which it is drivingly engaged to planet gears of a planetary gear system carried by an output spindle, which planet gears are also drivingly engaged centrally of the gear system by a sun gear carried by a torquing air vane motor, there being a live air feed passage common to both motors so as to cause them to operate separately and concurrently in the same direction; wherein a one way overrunning clutch means is arranged between the rotor of the rundown motor and a plate stationary with the housing, the clutch means being responsive to forward torque transmitted to the rundown motor to allow free running of the latter motor in a forward dIrection and being responsive to reverse torque transmitted to the rundown motor to engage the latter with the stationary plate so as to restrain the rotor of the latter motor against reverse rotation.
Claim 4
Dependent Claim
168 words
A two-speed dual drive stall torque nut running tool including an air vane rundown motor carrying a ring gear by means of which it is drivingly engaged to planet gears of a planetary gear system carried by an output spindle, which planet gears are also drivingly engaged centrally of the gear system by a sun gear carried by a torquing air vane motor, there being a live air feed passage common to both motors so as to cause them to operate separately and concurrently in the same direction; wherein a one way overrunning clutch means is arranged between the rotor of the rundown motor and a plate stationary with the housing, the clutch means being responsive to forward torque transmitted to the rundown motor to allow free running of the latter motor in a forward dIrection and being responsive to reverse torque transmitted to the rundown motor to engage the latter with the stationary plate so as to restrain the rotor of the latter motor against reverse rotation.
Claim 5
Dependent Claim
70 words
A two-speed dual drive stall torque nut running tool as in claim 2, wherein the motors are axially aligned with one another, the rundown motor having a forward rotor shaft end upon which the ring gear is carried and having an axial bore through which a drive shaft carrying the sun gear extends, the drive shaft being driven by the torquing motor and having rotation relative to the rundown motor.
Claim 6
Dependent Claim
114 words
A two-speed dual drive stall torque nut running tool as in claim 2, wherein the rotor of the rundown motor has a rear rotor shaft end projecting into a recess formed in the stationary plate, the clutch means has a clutch casing fixed in the recess, and the casing contains a ring of clutch roller elements in surrounding contacting relation with the rear rotor shaft end, the rollers being adapted to rotate freely upon the rear rotor shaft end in response to forward rotation of the latter and being adapted to lock the rear rotor shaft end with the casing in response to a reverse torque being applied to the rear rotor shaft end.
Claim 7
Dependent Claim
150 words
A two-speed dual drive stall torque nut running tool having a rundown air vane motor carrying a ring gear which drivingly engages planet gears carried by an output spindle, which motor is pneumatically operable concurrently and in the same direction with a torquing air vane motor carrying a sun gear which drivingly engages the planet gears; wherein a one-way overrunning clutch is arranged between the rotor of the rundown motor and a member stationary with the housing of the tool, the clutch being adapted to allow forward rotation of the rundown motor and being responsive to reverse torque transmitted to the latter motor by the sun gear through the planet gears to the ring gear to restrain the rundown motor to the stationary member against relative reverse rotation so as to permit the torquing motor to deliver its torque through the sun gear and planet gears to the output spindle.
Claim 8
Dependent Claim
150 words
A two-speed dual drive stall torque nut running tool having a rundown air vane motor carrying a ring gear which drivingly engages planet gears carried by an output spindle, which motor is pneumatically operable concurrently and in the same direction with a torquing air vane motor carrying a sun gear which drivingly engages the planet gears; wherein a one-way overrunning clutch is arranged between the rotor of the rundown motor and a member stationary with the housing of the tool, the clutch being adapted to allow forward rotation of the rundown motor and being responsive to reverse torque transmitted to the latter motor by the sun gear through the planet gears to the ring gear to restrain the rundown motor to the stationary member against relative reverse rotation so as to permit the torquing motor to deliver its torque through the sun gear and planet gears to the output spindle.
Claim 9
Dependent Claim
205 words
In a two-speed dual drive stall torque nut running tool containing a pair of air vane motors operating concurrently and separately in the same direction through common planetary gearing to drive a common work spindle, wherein a first one of the motors having a small gear reduction connection through the gearing with the spindle is adapted to stall upon the gearing upon reaching the limit of its torque capacity and a second one of the motors is adapted after such stalling action to continue torque delivery through the gearing until the extent of its torque capacity is reached; clutch means arranged between the rotor of the first motor and a member stationary with the housing of the tool having response to forwardly applied torque to the rotor of the first motor to allow forward rotation of the latter and having response to reactionary torque applied through the planetary gearing to the rotor of the first motor while the latter is stalled to engage the said rotor with the stationary member so as to restrain reverse rotation of the said rotor and to enable the second motor to continue delivery of its torque through the gearing to the work to the limit of its torque capacity.
Claim 10
Dependent Claim
205 words
In a two-speed dual drive stall torque nut running tool containing a pair of air vane motors operating concurrently and separately in the same direction through common planetary gearing to drive a common work spindle, wherein a first one of the motors having a small gear reduction connection through the gearing with the spindle is adapted to stall upon the gearing upon reaching the limit of its torque capacity and a second one of the motors is adapted after such stalling action to continue torque delivery through the gearing until the extent of its torque capacity is reached; clutch means arranged between the rotor of the first motor and a member stationary with the housing of the tool having response to forwardly applied torque to the rotor of the first motor to allow forward rotation of the latter and having response to reactionary torque applied through the planetary gearing to the rotor of the first motor while the latter is stalled to engage the said rotor with the stationary member so as to restrain reverse rotation of the said rotor and to enable the second motor to continue delivery of its torque through the gearing to the work to the limit of its torque capacity.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-21 | 1974-12-21 | 1975-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-21 | 1978-12-21 | 1979-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-21 | 1982-12-21 | 1983-06-22 | $7700.00 | Window Closed / Lapsed |