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US 2007/0164180 A1Published application
Conical cam
OwnerJohn Michael Peter Arraninventor
Life of this patent
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Abstract
A conical cam rotates through a greater angle than a conventional planar cam in constricted spaces providing a greater range of movement. A climbing device for obtaining a secure removable fixing in a crevice utilises one or more conical cams to achieve an improved expansion range without loss of strength and without additional weight or complexity.
Claims18
A device for providing an anchor at various sizes of openings in a surface, said device comprising:
- a camming member substantially conical in shape the base edge of which forms an arcuate surface such that the slant height is not constant;
- attachment means whereby a load may be attached to said device,
- whereby the device may be secured between the walls of a opening with a point on the arcuate surface of the camming member in contact with one wall of the opening.
Dependencies are inferred from the claim text.