Work holders – With fluid means – Cylinder-piston means in series with additional positioning...
Reexamination Certificate
2006-04-25
2006-04-25
Wilson, Lee D. (Department: 3723)
Work holders
With fluid means
Cylinder-piston means in series with additional positioning...
C269S024000
Reexamination Certificate
active
07032897
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.
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Hovey & Williams, LLP
Vektek, Inc.
Wilson Lee D.
LandOfFree
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