Don G Prather

US Patent:

53335228, Aug 2, 1994

Filed:

Nov 12, 1993

Appl. No.:

8/150993

Inventors:

Don G. Prather - Austin TX
Hugh M. Prather - Austin TX

International Classification:

B25B 1352

US Classification:

81 64

Abstract:

An oil filter wrench with self tightening capabilities for grasping and rotating a cylindrical oil filter can comprising, in combination, a wrench for grasping and rotating a cylindrical object filter can comprising, a strap fabricated of a flexible material having a fixed end and a free end, a ring platform with the fixed end of the strap slidably coupled thereto, an arcuate guide slot formed in the ring platform with a roller slidable therealong, the roller being coupled to the fixed end of the strap to allow limited sliding movement of the roller and the fixed end of the strap with respect to the ring platform, a spring resiliently coupling the roller and the free end of the strap to the ring platform, a flexible cable coupled at one end to the free end of the strap and guide means to control the movement of the cable with respect to the free end of the strap, and a handle coupled the ring platform to effect rotation of the strap with respect to a cylindrical object held by the strap and coupled to the other end of the cable for pulling the cable to tighten the strap around the object whereby continued pulling of the cable by the minor handle will grasp and rotate the object.