Cooling spoke arrangement for a brake disc
CA 2203197 C · Owner: Engle, Thomas H. · Inventors: Engle, Thomas H.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Brake disc for attachment to rotating machinery to retard the rotating machinery. The disc has a hub for attachment to the rotating machinery. The hub is structurally connected to a rim having two annular portions spaced apart axially from one another which have at least one opening therebetween and which have axisymmetric friction surfaces sloped in opposition to each other for contact with a brake shoe.
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 April 21, 1997 and granted November 7, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 21, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 21, 2019.
- 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.