B - Operations – Transporting – 25 – B
Patent
B - Operations, Transporting
25
B
81/55
B25B 13/52 (2006.01)
Patent
CA 1092867
CLEATED CHAIN WRENCH Jonathan L. Laird, Jr. - Parkesburg, PA Abstract of the Disclosure A chain wrench has a handle having a chain element pivoted to the handle by a pair of links to permit passage of the free end of the chain between the links, whereby the chain may be wrapped in full circumscribing relation to a workpiece. The handle has a camming surface and teeth elements positioned to confront the exposed surface of the chain when it is wrapped around the workpiece. The chain has a cleated surface on one side and has a smooth surface on the opposite side. In one mode of operation, the cleated surface confronts the workpiece to engage the same, whereby the cam surface causes the cleats to grip the workpiece and anchor the chain at that point when said handle is actuated to apply torque to the workpiece, the smooth surface permitting the chain to slide over said camming surface prior to applying torquing action upon said handle to afford snug engagement of the chain about substantially the entire circumference of the workpiece. In another mode of operation, the smooth surface of the chain confronts the workpiece and the cleated surface is exposed when it is wrapped around the workpiece. The teeth elements of the handle engage the cleated surface of the chain so that the cleats mesh with the teeth of the handle to tighten the chain around the workpiece when the handle is actuated to apply torque to the workpiece. The chain may be either a link-type chain having metallic links, or a strap of textile material which may be used when the workpiece has a high finish which may be easily damaged by either surface of the chain. Preferably, the wrench provides two chain elements which may be used interchangeably.
312739
Borden Ladner Gervais Llp
Laird Jonathan L. Jr.
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