Work holders – With fluid means – Cylinder-piston means in series with additional positioning...
Patent
1995-05-12
1997-01-21
Watson, Robert C.
Work holders
With fluid means
Cylinder-piston means in series with additional positioning...
269229, 269239, B25B 504
Patent
active
055953751
ABSTRACT:
A clamp for releasably gripping a workpiece includes a base member, a first jaw portion attached to the base member and having a first gripping portion and a second jaw member pivotally coupled to the base member at a pivot location, and having a second gripping portion. The second jaw is pivotable about the pivot location between an open, retracted position where the first and second gripping portions are spaced apart and a closed, gripping portion where the first and second gripping portions engage the workpiece and apply a gripping force to hold the workpiece. An actuator selectively retracts the second jaw member from the gripping position into the retracted position by application of a retracting force. A mechanism which may include a cam or an over-center linkage releasably holds the second jaw member in the retracted position independently of the retracting force.
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Benn Corporation
Lynch Thomas W.
Watson Robert C.
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