Method of forming a brake drum
CA 1248332 A · Owner: Rockwell International Corporation · Inventors: Williams, Richard J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract:, A method of forming a brake drum includes the steps of casting an iron cylindrical brake drum with a flange end and an open end to include a plurality of generally axially extending fins around an exterior surface thereof. The casting includes providing the fins with radially extending side walls which diverge along a length thereof from the open end to a widest distance therebetween at a predetermined location from the open end and converge along the length thereof from the predetermined location toward the flange end. Accordingly adjacent side walls of adjacent fins define a space therebetween having its narrowest portion at the predetermined location. A braking surface is …
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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 January 10, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 10, 2006.
- 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.