Chucks or sockets – Expanding – Collet type
Patent
1991-03-08
1992-09-22
Bishop, Steven C.
Chucks or sockets
Expanding
Collet type
279 469, 279 51, 279156, 279157, B23B 3140, B23B 3120
Patent
active
051491117
ABSTRACT:
An arbor or chuck assembly for holding a workpiece or tool includes an arbor or chuck body having a linear body portion and an or contraction portion with inclined faces, a collet positioned radially between the arbor or chuck body and the workpiece or tool for reciprocal movement along a machine axis and having a linear body portion and an expansion/contraction portion with inclined faces in sliding contact with those of the arbor or chuck body, and a ball bushing provided between the linear surfaces of the collet and arbor or chuck body with a slight interference fit, in order to provide zero clearance and substantially frictionless movement therebetween. Expansion and release of the arbor or chuck is controlled by a compression spring biasing the collet in the expansion direction, and a drawbar for pushing the collet against the spring force in the release direction. The collet may have rubber seals for sealing its slots and expansion apertures from contaminants. A cap mounted on the end of the arbor or chuck body may have a tapered wall which slidingly engages an edge of the collet portion as it reaches the end of its travel in the release direction to avoid deformation.
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patent: 3774313 (1973-11-01), Occhialini et al.
patent: 3997176 (1976-12-01), Wyckoff et al.
Bishop Steven C.
Chong Leighton K.
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