Wet disc brake
CA 2062292 C · Owner: Schaber, Charles D. · Inventors: Schaber, Charles D.; Dewald, Gregory T.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A spring applied - hydraulically released (SAHR) type wet disc brake for a wheeled vehicle having a large braking torque and energy absorption capacity. The brake unit includes a piston housing in which an annular piston is mounted for reciprocal movement towards and away from a disc housing. The disc housing defines a disc chamber in which a plurality of interleaved non-rotating and rotating discs are disposed. A pressure plate disposed on one side of the disc pack is mounted for reciprocating movement towards and away from the disc pack and is operative to apply clamping forces to the discs in order to generate braking torque. A plurality of biasing springs urges the pressure plate …
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 March 4, 1992 and granted October 21, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 4, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 4, 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.