Work holders – Relatively movable jaws – Means to actuate jaw
Patent
1978-07-17
1979-06-26
Watson, Robert C.
Work holders
Relatively movable jaws
Means to actuate jaw
269 481, 269254R, 269266, B25B 120
Patent
active
041591070
ABSTRACT:
A clamping device for holding a regularly or irregularly-shaped part on a work table for machining and work operations. The clamping device has a substantially solid housing with an interior cavity filled with an essentially non-compressible elastomeric material. A disk-like pressure plate abuts a surface of the elastomeric material, and a plurality of sleeves are formed in the housing which extend radially outwardly of the interior cavity of the housing. A plurality of equally sized plungers are slidable in the sleeves that are formed as part of the housing. Pressure and movement exerted by the pressure plate against the elastomeric material is transmitted into radially outward extension of the plungers relative to the housing. Flexible extender tubes are mounted onto the clamp plungers, and they are substantially filled with elastomeric material and have part-engaging plungers at one end. When the clamp plungers are extended radially outwardly, the part-engaging plungers are likewise extended outward from the extender tubes.
REFERENCES:
patent: 1453176 (1923-04-01), Perrine
patent: 2285295 (1942-06-01), Martindell
Persista, Inc.
Watson Robert C.
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