Patent ID: 8146462

Claim:
An adjustable cam wrench comprising a pair of lever arms, one lever arm having a pocket for a nut or bolt, said pocket being configured to contact from two to three faces of said nut or bolt, the other lever arm having a cam surface, a fixed pivot member, said pivot member forming a fixed pivot point, each of said pair of lever arms being rotatable around said fixed pivot point, one of said lever arms being rotatably fixed to a bearing member and said bearing member being rigidly fixed to said fixed pivot member, said bearing member being rotatably secured to said other lever arm, said bearing member being rotatable about its center, said fixed pivot being fixed to said bearing member at a position such that the center of rotation of said fixed pivot member is non-concentric with respect to said bearing member, a lever arm position adjuster means fixed to said bearing member for rotating said bearing member, a transverse pin, said transverse pin being positioned to lock said lever arm position adjuster means to said bearing member, said position adjuster means is an arm member pivotable about said transverse pin that attaches said arm member to said bearing member, said arm member being pivotable about an axis of said transverse pin transverse to the rotational axis of said bearing member whereby rotation of said adjuster means varies the distance between the cam surface and said pocket.