Scroll hydraulic machine
CA 2241869 C · Owner: Mitsubishi Heavy Industries, Ltd. · Inventors: Watanabe, Kazuhide; Miura, Shigeki; Takeda, Kimiharu
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A scroll hydraulic machine comprising a housing having a key groove, a fixed scroll disposed in said housing a swirling, scroll having a key groove disposed in said housing engaging, with said fixed scroll, and moving in a swirling motion and an, Oldham ring provided with a swirling key engaging in a freely, sliding manner, with said key groove formed on said swirling scroll, and a fixed key engaging, in a freely sliding manner with the key groove formed on said housing and Sn plated on at, least one side surface of the swirling key and the fixed key.
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 June 29, 1998 and granted March 5, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 29, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 29, 2020.
- 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.