Fluid-operated piston
CA 1265417 C · Owner: General Motors Corporation · Inventors: Lederman, Frederick E.
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 fluid-operated friction engaged torque transmitting device, such as a clutch or brake has a, piston member. The piston has a rigid material such, as metal or plastic, body member which is encased in an elastomeric cover. The elastomeric cover is a molded structure which is bonded to the rigid body. The elastomeric cover has integrally formed therewith during molding, a pair of annular lip seals a valve, structure and a spring portion. A reaction plate or ring is molded or bonded to the spring portion.
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
- Granted February 6, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 6, 2007.
- 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.