Plastic pulleys
CA 1137793 A · Owner: Hooker Chemicals & Plastics Corp. · Inventors: Emmett, John E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Case 4332 JFM/smt 12/12/79, IMPROVED PLASTIC PULLEYS ABSTRACT OF THE DISCLOSURE, Plastic pulleys are improved by providing a shaped metal ring on the plastic surface of the pulley sheave which contacts the belt. The metal ring provides a surface with the wear resistance and thermal conducting properties that reduce belt and pulley wear.
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 December 21, 1982. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 21, 1999.
- 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.