US Patent: 4,690,415
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| Hydraulic Nosepiece Assembly for a Collet Closer, and Method
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Patentee:
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| Warren B. Holdridge (exact or similar names) - Gardena, Los Angeles County, CA |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Aug. 15, 1986 |
| Granted: |
Sep. 01, 1987 |
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Joel Havens
"Vintage Machinery" entry for Holdridge Mfg. Co.
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Description: |
| Abstract:
A method and apparatus are shown for closing a spring collet upon a work piece in a lathe or similar machine tool, in which neither the work piece nor the collet is moved in the longitudinal or axial direction.
The collet closer has a nosepiece assembly within which an axially movable sleeve is provided. Movement of the sleeve causes the collet to open or close, in a radial direction, without axial dislocation of either collet or work piece.
The nosepiece assembly contains a hydraulic circuit which actuates the movable sleeve in response to movements of a draw bar. |
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