Split sprocket with quick locking mechanism
CA 2106552 C · Owner: Polychem Corporation · Inventors: Hannum, Joseph Robert
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A split sprocket with quick locking mechanism is made of non-metallic components. The split sprocket is coupled to a shaft element by removable wedge members disposed between the sprocket's half members. Key members in, conjunction with set screws, secure the wedge members and prevent the sprocket's half members from tilting about the shaft element. The wedge members maintain a uniform pitch diameter of the sprocket's teeth by preventing contact between the half sprocket members.
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
- Filed September 20, 1993 and granted February 3, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 20, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 20, 2015.
- 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.