Drum brake assembly, brake shoes for same, and method
CA 1306203 C · Owner: Flaim, Thomas A. · Inventors: Flaim, Thomas A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure A drum brake assembly with the brake shoe lining friction surface subtending over a total effective friction surface arc length between the shoe heel and toe ends of about 49° on the first or primary shoe, symmetrical about the shoe horizontal center line, and about 57° on the second or secondary shoe similarly symmetrical. The first or primary shoe may have about the same friction surface arc length as the second or secondary shoe in some instances each then, preferably being about 50% of the friction surface arc length of the prior art typical secondary shoe lining of about 117°. Different methods of reducing the effective friction surface arc lengths are …
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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 August 11, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 11, 2009.
- 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.