Sprocket wrench with clamp
OwnerRoss Whitneyinventor
Life of this patent
Estimating the term…
Abstract
A sprocket gripping tool has a clamp with first and second opposed jaws. The first jaw has first, second, and third holes and the second jaw has a first threaded hole and a protuberance receivable within the second hole of the first jaw. A threaded knob passes through the first hole of the first clamp and threadingly engages the second clamp to draw the jaws together. A lever arm with a grip end has a pin that engages with sprocket teeth and a hole for attaching one end of a length of roller chain. The other end of the chain attaches to the clamp. The grip end, roller chain and clamp all engage sets of sprocket teeth, so the sprocket may be torqued by the lever arm.
Claims20
A clamp for a sprocket of a tooth and sprocket system defining a diametral pitch, comprising first and second opposed jaws, with said first jaw comprising first, second, and third through apertures having parallel axes and said second jaw comprising a first through aperture having internal threads and a protuberance of which at least a portion is complementary to and receivable within said second through aperture of said first jaw, and
- a threaded fastener receivable within said first through aperture of said first jaw, threadingly receivable within said first through aperture of said second jaw, and having a head larger than a diameter of said first through aperture of said first jaw,
- wherein a roller chain defines a pitch complementary to said diametral pitch of said tooth and sprocket system, and wherein at least two from among said first, second and third through apertures are spaced apart by said pitch.
A sprocket gripping tool, comprising a clamp for a sprocket of a tooth and sprocket system defining a diametral pitch, further comprising
- first and second opposed jaws, with said first jaw comprising first, second, and third through apertures having parallel axes and said second jaw comprising a first through aperture having internal threads and a protuberance of which at least a portion is complementary to and receivable within said second through aperture of said first jaw, and
- a first, threaded fastener receivable within said first through aperture of said first jaw, threadingly receivable within said first through aperture of said second jaw, and having a head larger than a diameter of said first through aperture of said first jaw;
- a lever arm having a grip end comprising a first pin receivable within a gap between teeth of a sprocket, and
- a first through aperture for receiving a second fastener;
- and
- a length of roller chain having its first end secured by said second fastener to said grip end of said lever arm, and its second end secured by a third fastener to said clamp,
- wherein said roller chain defines a pitch complementary to a tooth and sprocket system having a diametral pitch, and at least two from among said first, second, and third through apertures of said first jaw are spaced apart by said pitch.
Dependencies are inferred from the claim text.