Coupling assembly
CA 2047323 C · Owner: Collins, Marcus H. · Inventors: Diesch, Ronald W.; Collins, Marcus H.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An improved coupling assembly includes a polyurethane bushing which cooperates with a friction disc to transmit force. The polyurethane bushing reduces noise caused by components of the coupling assembly and reduces the maximum rate of acceleration between elements of the coupling assembly. The polyurethane bushing has a durometer hardness of approximately 92 Shore A and a Bayshore rebound of 20% to 50%. The maximum rate of acceleration between elements of the coupling assembly is less than 30 times the acceleration of gravity while the coupling assembly transmits a torque load which cyclically varies between at least + 12,500 pound inches and at most -2,500 pound inches during rotation of …
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 July 18, 1991 and granted June 24, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 18, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 18, 2013.
- 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.