Cam action clamp
First Claim
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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Accused Products
Abstract
A cam action clamp for use against a fixed clamping surface comprising a threaded shaft extending outwardly from the fixed clamping surface and a movable clamping member having a channel therethrough to allow the clamping member to be mounted on the threaded shaft for slidable movement along the shaft. A thrust plate is affixed to the movable clamping member adjacent the channel. A mounting block is threadably mounted on the threaded shaft and a clamping handle is pivotally mounted to the mounting block. The handle is formed as a cam member that abuts the thrust plate. Pivoting the handle causes the cam member to engage the thrust plate to slidably advance the movable clamping member along the threaded shaft toward the fixed clamping surface in order to clamp an article between the surfaces. The mounting block can be rotated along the threaded shaft to vary the distance between the clamping surfaces. The thrust plate can be formed with stepped surfaces that allow the clamping handle to be repositioned to a more convenient angle while still applying the same clamping force. In addition, a shroud member is provided that encloses the threaded shaft to prevent objects, such as a user'"'"' s hand, getting pinched between the shaft and the pivotable clamping handle.
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Citations
14 Claims
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1. A cam action clamp for use against a fixed clamping surface comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A cam action clamp for use against a fixed clamping surface comprising:
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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, 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; and a shroud member in the form of an arcuate section enclosing said threaded shaft and adapted to permit pivoting of said handle member past said shaft and prevent objects from becoming caught between said handle and threaded shaft during said pivoting. - View Dependent Claims (11, 12, 13, 14)
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Specification