Chucks or sockets – Expanding – Collet type
Patent
1994-09-02
1996-10-01
Bishop, Steven C.
Chucks or sockets
Expanding
Collet type
118503, 269 481, 427128, 451 63, 451307, 279 50, B23B 3140
Patent
active
055606245
ABSTRACT:
A collet system for mounting, holding, and rotating a rigid disk substrate is described, the collet system including a collet and an expander, the collet having a base portion and fingers longitudinally extending therefrom. The inner surface of the disk is clamped by the radially expanding fingers at a location which is not coplanar with any locus of expansion contact points between the collet fingers and the expander. The outward radial force exerted on the inner disk surface is thereby determined by a cantilever spring tension experienced by the fingers, thus producing a highly consistent, repeatable force which is robust against small frictional variations in the environment and against small variations in inner diameters among disks. Inward axial movement of the expander into the collet is abuttably stopped at a predetermined offset for increased robustness, tolerance, and repeatability of results.
REFERENCES:
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patent: 2929635 (1960-03-01), Czerenda
patent: 3143356 (1964-08-01), Pray
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patent: 3868886 (1975-03-01), Bondie
patent: 4403319 (1983-09-01), Adamek et al.
patent: 4408318 (1983-10-01), Sugiura
patent: 4705279 (1987-11-01), Mizukami et al.
patent: 4755981 (1988-07-01), Ekhoff
patent: 5275424 (1994-01-01), Watanabe
Hoshizaki Jon
Hursh Kevin C.
Williams Roger O.
Bishop Steven C.
Exclusive Design Company
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