Power operated rotatable clamping assembly

Details Power operated rotatable clamping assembly Power operated rotatable clamping assembly

1983-03-04

1985-01-22

Watson, Robert C.

Work holders

With fluid means

Cylinder-piston means in series with additional positioning...

269 77, 269233, 269 93, 269237, B23Q 308

Patent

active

044947399

ABSTRACT:
A clamping assembly is operated by a piston and cylinder assembly rotatably mounted on a support. A mounting bracket rotatably mounted on the support is provided with a pair of pivotally mounted plates each having a clamping arm and a cam track. The mounting bracket includes an annular shoulder engaging the support; a flange draws the shoulder against the support, thereby selectively locking the bracket and the piston and cylinder against rotation in any of a plurality of rotational positions. A drive rod connected to the piston extends through the support and into an elongate slot in the bracket. A pair of rollers secured to the outer end of the rod are disposed in the cam slots and drive the plates to pivot. The cam slots are specially configured to lock the clamp in a locking position in the event that fluid pressure is lost in the piston.

REFERENCES:
patent: 930687 (1909-08-01), Pfeifer
patent: 1274074 (1918-07-01), O'Brien
patent: 1351232 (1920-08-01), Collins
patent: 3482830 (1969-12-01), Sendoykas
patent: 3570835 (1971-03-01), McPherson

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