Power clamp

Details Power clamp Power clamp

1993-11-29

1995-10-24

Watson, Robert C.

Work holders

With fluid means

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

B23Q 308

Patent

active

054603587

ABSTRACT:
A power clamp including a clamp assembly which is moved by a power cylinder rapidly to an approximate clamping position and is thereafter moved by the power cylinder with an intensified force to the final clamp position. The clamp includes a support structure defining a guideway, a drive assembly secured to the piston rod of the power cylinder and slidably mounted in the guideway, a guide lever pivotally mounted to the support structure, and a clamp lever pivotally mounted to the guide lever. The drive assembly includes a drive pin which is received in guide slots in the guide lever and in the clamp lever. The initial movement of the clamp assembly comprises joint pivotal movement of the guide lever and clamp lever about the pivot axis of the guide lever, the next portion of the movement comprises pivotal movement of the clamp lever relative to the guide lever under the impetus of the drive pin, and the final portion of the clamping movement comprises intensified incremental pivotal movement of the clamp lever relative to the guide lever resulting from wedging engagement of a roller carried by the drive assembly against a wedge surface defined by a tail portion of the clamp lever.

REFERENCES:
patent: 2162133 (1939-06-01), Spire
patent: 3570835 (1971-03-01), McPherson
patent: 3576151 (1971-04-01), Sendoykas
patent: 4887803 (1989-12-01), Witt
patent: 5020418 (1991-06-01), Sendoykas
patent: 5216942 (1993-06-01), Sendoykas

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