Method for manufacturing a drum brake shoe
CA 2102898 A1 · Owner: Alliedsignal Inc. · Inventors: Johannesen, Donald Dixon
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A drum brake shoe is provided by fine blanking the brake shoe web (50) so that the web (50) has radially extending weld projections (60) at a circumferential edge (52) with a radial recess (62) , disposed on each side of a weld projection (60). As a brake shoe rim (40) is fed through a welding and forming mechanism (65) a, flat surface (41) of the rim (40) engages a radially extending weld projection (60) and a weld is effected. Welding wheels (90 100) of the mechanism (65) rotate to bend the rim (40) and engage the rim (40) with the next weld projection as a weld is effected between the rim (40) and web (50). The manufacturing method will provide a more consistent welding process that …
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 15, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 15, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 15, 2014.
- 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.