Self-locking clamping device

Details Self-locking clamping device Self-locking clamping device

1986-08-12

1988-01-26

Watson, Robert C.

Work holders

With fluid means

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

269 94, 269234, 269238, B23Q 308

Patent

active

047212934

ABSTRACT:
A self-locking, fluid-operated, tool clamping device is disclosed. The device provides a double-acting piston formed with a camming surface intermediate its ends. The camming surface is formed with a locking angle with respect to the axis of the piston. A cylindrical clamping pin is guided within the device for movement in a direction perpendicular to the camming surface and is provided with an end surface perpendicular to such direction of movement which engages the camming surface. An output lever pivotably mounted on the device engages the clamping pin at one end and is operable to engage tooling at its other end to clamp the tooling in position. The clamping pin is cylindrical and is free to rotate about its axis so as to reduce localized wear when the device is repeatedly cycled. A spring operably positioned between the lever and the body of the device resiliently biases the lever and the clamping pin toward the release position.

REFERENCES:
patent: 2722867 (1955-11-01), Dackor et al.
patent: 3170322 (1965-02-01), Cavanaugh
patent: 3336022 (1967-08-01), Tridgell
patent: 3941362 (1976-03-01), Arnold et al.
patent: 3998444 (1976-12-01), Stockwell
patent: 4406445 (1983-09-01), Seidel
patent: 4511127 (1985-04-01), Schron et al.

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