Tool coupling apparatus

Claim 2

Appartus for use in coupling or uncoupling a tool to or from a rotating spindle, said apparatus comprising a housing; a normally stationary rotor for supporting such tool; means mounting said rotor in said housing for rotation about an axis and for movements relative to said housing along an axial path between a lowered position and a raised position in which said rotor is engageable by said tool, said rotor being rotatable and movable from its raised position toward its lowered position in response to its engagement with said tool; and retarding means carried by said housing and engageable with said rotor in response to movement thereof toward its lowered position to apply a braking force on said rotor.

Claim 3

Apparatus according to claim 1 including means biasing said rotor toward its raised position.

Claim 4

Apparatus according to claim 1 including limit means in the path of movement of said rotor toward its raised position for limiting the extent of such movement.

Claim 5

Apparatus according to claim 3 wherein said limit means comprises a peripheral flange carried by said rotor and stop means carried by said housing in a position to engage said flange.

Claim 6

Apparatus according to claim 1 including limit means in the path of movement of said rotor toward its retracted position for limiting the extent of such movement.

Claim 7

Apparatus according to claim 5 wherein said limit means comprises a peripheral flange carried by said rotor and stop means carried by said housing in a position to engage said flange.

Claim 8

Apparatus according to claim 1 wherein said rotor has an exposed face engageable with said tool; an axially movable sleeve encircling said rotor and engageable by said tool for axial movements relative to said housing; and stop means in the path of movement of said sleeve axially of said housing for limiting the extent of such movement.

Claim 9

Apparatus according to claim 7 wherein said stop means is resiliently deformable.

Claim 10

Apparatus according to claim 1 including clutch means carried by said rotor for engagement with said tool.

Claim 11

Apparatus according to claim 9 wherein said clutch means comprises a member having a high coefficient of friction.

Claim 12

Apparatus according to claim 9 wherein said clutch means comprises an annular friction member.

Claim 13

Apparatus according to claim 10 wherein said member comprises a ring.

Claim 14

Apparatus for use in coupling and uncoupling a tool to or from a vertically movable, rotating spindle, said apparatus comprising a housing; a normally stationary rotor journaled in said housing for rotation about a vertical axis, said rotor having an exposed upper face engageable by said tool; means mounting said rotor for vertical, axially reciprocating movements between raised and lowered positions, said rotor being rotatable and axially movable in response to engagement of said tool with said face; retarding means carried by said housing in the path of movement of said rotor and engageable with the latter in response to movement thereof toward its lowered position for exerting a braking force on said rotor; and yieldable biasing means acting on said rotor for permitting movement thereof toward its lowered position and constantly urging said rotor to its raised position in which said rotor and said retarding means are disengaged.

Claim 15

Apparatus for use in coupling and uncoupling a tool to or from a vertically movable, rotating spindle, said apparatus comprising a housing; a normally stationary rotor journaled in said housing for rotation about a vertical axis, said rotor having an exposed upper face engageable by said tool; means mounting said rotor for vertical, axially reciprocating movements between raised and lowered positions, said rotor being rotatable and axially movable in response to engagement of said tool with said face; retarding means carried by said housing in the path of movement of said rotor and engageable with the latter in response to movement thereof toward its lowered position for exerting a braking force on said rotor; and yieldable biasing means acting on said rotor for permitting movement thereof toward its lowered position and constantly urging said rotor to its raised position in which said rotor and said retarding means are disengaged.

Claim 16

Apparatus according to claim 13 including limit means acting between said housing and said rotor for limiting axial movements thereof.

Claim 17

Apparatus according to claim 13 wherein said housing has a bottom and wherein said yieldable biasing means comprises compression spring means reacting between said rotor and the bottom of said housing.

Claim 18

Apparatus according to claim 13 wherein said retarding means comprises force applying means extending substantially radially of the axis of rotation of said rotor and in engagement with the rotor at its periphery, said force applying means exerting a substantially radial force on said rotor.

Claim 19

Apparatus according to claim 16 wherein the periphery of said rotor is inclined to said axis and in such direction as to cause the force exerted thereon by said force applying means to increase as said rotor moves toward its lowered position.