Drive-head lock washer

F - Mech Eng,Light,Heat,Weapons – 16 – B

Patent

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85/63

F16B 39/24 (2006.01)

Patent

CA 1306371

ABSTRACT There is provided a flanged drive-head lock washer for use in combination with a wedge-action-type fastener, wherein the fastener includes a bolt or screw member having a cam nut or cam head. The flanged drive- head washer is formed having a nut-like body and a plurality of wrench-engaging sides to match the sides of the particular nut or head of a bolt. The upper face of the washer comprises a plurality of cam members ar- ranged to lockingly engage the corresponding cam surface formed on the contacting surface of the cam nut or cam head. The lower surface of the washer is formed having a frictional surface defined by an enlarged annular flange. The matching cam surfaces are arranged to align the corresponding wrench-engaging side walls, whereby the cam nut or cam head can be simultaneously rotated during removal of the fastener without affecting the integrity of the fastener.

581764

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