Tool retainer having axially and radially movable clamping membe

Details Tool retainer having axially and radially movable clamping membe Tool retainer having axially and radially movable clamping membe

1984-06-04

1986-01-28

Silverberg, Fred

Chucks or sockets

With fluid-pressure actuator

Socket type

279 20, 279 28, B23B 3130

Patent

active

045667055

ABSTRACT:
The drill spindle of a deep well drilling machine has a sleeve-like extension with a conical internal surface which is complementary to conical external surfaces on an annulus of claws forming part of a clamping device which is inserted into the extension and has an axial passage for the shank of a rotary tool. A set of dished springs normally urges a ring against a conical end face of the clamping device whereby the latter urges its claws against the internal surface of the extension and the claws transmit torque from the spindle to the shank of the tool. If the transmission of torque is to be terminated, the piston of a fluid-operated motor is caused to shift the ring against the opposition of the dished springs whereby the claws relax the force with which they engage the shank and the latter can be extracted from the passage of the clamping device.

REFERENCES:
patent: 2860881 (1958-11-01), Perrachione
patent: 3072416 (1963-01-01), Leifer
patent: 3451314 (1969-06-01), Smrekar
patent: 3490333 (1970-01-01), Scruton
patent: 4094521 (1978-06-01), Piotrowski

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