Power transfer assembly with one-piece retainer ring
CA 2062786 A1 · Owner: Lammers, Bryan G. · Inventors: Lammers, Bryan G.; Fee, David M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A power transfer assembly (10) with a one-piece retainer ring (46) includes a housing (12), a plurality of alternating rotatable and non-rotatable friction discs (24, 26) a power actuated piston, (28), a spring washer (42) a cushion spring (30) between the, piston (28) and the friction discs (24 26), and a retaining ring, (46) for retaining the spring washer (42) in place. The one-piece retainer ring (46) includes a first retainer portion (48) positioned within a recessed groove (44) in the housing (12) and a second portion (50) in contact with the spring washer (42). Prior art clutch and brake assemblies utilize several types of retaining rings and reaction type wear members to retain …
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 8, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 8, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 8, 2013.
- 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.