Chucks or sockets – Expanding – Collet type
Patent
1997-02-13
1999-02-09
Bishop, Steven C.
Chucks or sockets
Expanding
Collet type
279143, B23B 3140, B23B 3120
Patent
active
058684000
ABSTRACT:
A push-type expanding mandrel apparatus that includes an expandable member with a tapered mandrel and a pushing member with a push rod. The body of the pushing member is held within a bore in a collet adapter that fits within the bore of a machine spindle, and the push rod enters a bore in the expanding member and tapered mandrel. Force applied to the back of the collet adapter is transferred to the pushing member at the interface of a tapered, inward facing shoulder in the bore of the collet adapter and a tapered hip on the body of the pushing member. As force is transferred to the pushing member, the push rod within the bore of the tapered mandrel exerts an outward force on the mandrel, causing leaves on the mandrel to expand outward and grip a workpiece from within a bore in the workpiece.
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patent: 4465244 (1984-08-01), Karr
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patent: 5396708 (1995-03-01), Whitley
Bishop Steven C.
Lares Research
O'Banion John P.
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