Chucks or sockets – With fluid-pressure actuator – Socket type
Patent
1988-10-24
1989-12-05
Bishop, Steven C.
Chucks or sockets
With fluid-pressure actuator
Socket type
279 51, 279 53, B23B 3120
Patent
active
048848212
ABSTRACT:
A collet chuck having a tubular housing with the inside diameter tapering outwardly at one end to match the taper of an inserted collet, threads on the reduced outside diameter of the housing at this same end for a collet closer or disc tightener to screw on. This collect closer is in the shape of a disc with knurled outer surface, and radial holes spaced in this outer surface so a lever can be inserted in any of these holes to assist in screwing the disc on the housing. A section of the inside diameter of the disc is threaded, the remaining part is an enlarged recess. When the disc is screwed on the housing, a needle thrust bearing and the flat ring of a rod assembly is loosely positioned in the recess of the disc tightener. A lock ring that slides on the larger diameter of the housing is fastened to the disc tightener to form a closed pocket with the ring and bearing inside. Rods fastened to the flat ring and sliding in axial holes through the wall section of the larger diameter of the housing, have a flange nut fastened to the rod ends protruding from the housing. This flange nut slides in the enlarged diameter end of the housing and has an internal threaded diameter for the collet to screw into. With the collet in place, any movement of the disc tightener will transfer to the collet, causing the collet to move in and out of the housing. Thus the collet can clamp or release a workpiece. A threaded plunger screwed through an axial hole in the wall of the housing, has a spring actuated tip to fit in the groove of the collet to prevent the collet from rotating, but to allow it to slide in and out of the housing.
REFERENCES:
patent: 2434600 (1948-01-01), Swenson
patent: 2574754 (1951-11-01), Peters
patent: 3746353 (1973-07-01), Allen
patent: 4218165 (1980-08-01), Riddersholm
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