Anti-rotation ring for a scroll machine
CA 2091482 A1 · Owner: Tecumseh Products Company · Inventors: Richardson, Hubert, Jr.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An anti-rotation device for a hermetic scroll type compressor, including a ring member with an opening having two parallel sides and one pair of axially aligned tabs. An interfitting orbiting scroll hub having two opposing flats slides within the oldham ring opening with the orbiting hub flats sliding against and rectilinearly with parallel sides of the opening. Ring member tabs slide in a pair of grooves on the compressor frame perpendicular to the direction of sliding of the orbiting scroll hub.
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 11, 1993. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 11, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 11, 2015.
- 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.