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Cam action clamp

  • US 5,156,508 A
  • Filed: 01/09/1991
  • Issued: 10/20/1992
  • Est. Priority Date: 12/27/1989
  • Status: Expired due to Term
First Claim
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1. A cam action clamp for use against a fixed clamping surface comprising:

  • a threaded shaft extending outwardly from said fixed clamping surface;

    a movable clamping member having a clamping surface and a channel therethrough to allow said member to be mounted on said threaded shaft for slidable movement along said shaft;

    a thrust plate adjacent said movable clamping member adjacent said channel;

    coarse adjustment means comprising a mounting block threadably mounted on said threaded shaft;

    a clamping handle pivotally mounted to said mounting block for movement between a released and a clamped position, said handle being formed with fine adjustment means comprising a cam member that abuts said thrust plate whereby pivoting said handle causes said cam member to engage said thrust plate to slidably advance said movable clamping member along said threaded shaft toward said fixed clamping surface in order to clamp an article between said clamping surfaces, and whereby said mounting block can be rotated along said threaded shaft to vary the distance between said clamping surfaces;

    said thrust plate being formed with means to permit substantially the same clamping force to be exerted at different clamped positions of the clamping handle with respect to said threaded shaft.

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