Bicycle sprocket drive assembly
CA 1262644 C · Owner: Sharon, Wilfred John · Inventors: Sharon, Wilfred John
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A bicycle sprocket drive which utilizes a crank having a number of splines and a sprocket having mating indentations or slots in its face. The splines and the mating radial slots have tapered driving faces. By cold forming the tapered slots into the front face of the sprocket, as by a stamping process the, removal of material from the sprocket is avoided. The resulting back faces of the sprocket slots, because they are displaced from the remainder of the sprocket, serve to provide the desired alignment of the drive sprocket with the rear or driven sprocket of the bicycle.
Read the whole patent
Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted November 7, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 7, 2006.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.