Swing clamp apparatus with spring biased cam assembly

Details Swing clamp apparatus with spring biased cam assembly Swing clamp apparatus with spring biased cam assembly

2005-05-03

2005-05-03

Wilson, Lee D. (Department: 3723)

Work holders

With fluid means

Plural positioning means sequentially operated

C269S032000

Reexamination Certificate

active

06886820

ABSTRACT:
An improved shiftable clamp (12) adapted for connection to a fixture (10) is provided, wherein the clamp (12) is selectively operable to engage and hold a workpiece (14) to the fixture (10). The clamp (12) includes a tubular body (22) and a piston (24) telescopically received within the body (22). Movement of the piston (24) is guided and controlled by way of a cam assembly (26) including a cam track (64) formed in the piston (24) and an associated cam track follower ball (66) mounted on the body (22). A spring unit (74) is also provided on the body (22) and includes a spring (82, 96) serving to self-center and bias the ball (66) into the track (64). This insures that the ball (66) smoothly rotates during movement of piston (22) and reduces wear and premature clamp failure.

REFERENCES:
patent: 3572216 (1971-03-01), Seesody
patent: 3605569 (1971-09-01), Seesody
patent: 5192058 (1993-03-01), VanDalsem et al.
patent: 5820118 (1998-10-01), Craft
patent: 5876025 (1999-03-01), Yonezawa
patent: 6663093 (2003-12-01), Yonezawa et al.

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