Quickly interchangeable chuck with mechanical power assist clamp

Chucks or sockets – With fluid-pressure actuator – Jaws mounted on flexible member; i.e. – diaphragm

Patent

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Details

279 205, B23B 3132

Patent

active

053261143

ABSTRACT:
A quick-change chuck includes a power-assist clamp feature for use in a machine tool having a powered draw bar. The chuck body includes inner and outer faces with a bore formed therethrough. A tapered polygon alignment pin extends inwardly from the inner face to center the chuck on a longitudinal axis of the machine tool. An axially-movable member is supported by the body for reciprocation along the longitudinal axis, and jaws which move radially as the axially movable member is reciprocated, are connected to the movable member for receiving and clamping a workpiece. The jaws are normally spring-biased to a preload or clamped position. A clamping stud is also connected to the movable member for receiving the draw bar gripping fingers. An initial stroke of the powered draw bar pulls the stud and registers the chuck onto the machine tool, and further stroke in the same direction displaces the clamping stud and movable member to provide the power-assist clamping to the workpiece.

REFERENCES:
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patent: 2824744 (1958-02-01), Peters
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patent: 3600777 (1971-08-01), Ollearo
patent: 3604083 (1971-09-01), Antonietto
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patent: 4512068 (1985-04-01), Piotrowski
patent: 4662043 (1987-05-01), Stone et al.
patent: 4777713 (1988-10-01), Kitamura
Pratt Burnerd America "The Most Advanced Power and Manual Chucks in the Industry, Jun. 1990".
Aros Elmec Super Lock.
Price List from Pratt Burnerd America, dated Feb. 5, 1990.
Advertising Brochure entitled "Power Draw Bars" from A. Ott Kempten.

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