Scroll hydraulic machine
CA 2227685 C · Owner: Takeuchi, Makoto · Inventors: Takeuchi, Makoto; Miura, Shigeki
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed is a scroll hydraulic machine comprising: a fixed scroll; a swirling scroll, which performs a revolving swirling motion while engaging with the fixed scroll; an Oldham joint, being made of a ferrous alloy and having a key for causing the swirling scroll to move in a revolving swirling motion while preventing the swirling scroll from rotating; an aluminum front case, structured such that a key-groove portion, to which the key of the Oldham joint is fitted, and a portion supporting a thrust force acting an the swirling scroll, are made of a ferrous alloy so that even when lubricating oil slightly runs out abnormal, abrasion of the key groove does not occur; and a case body for …
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 January 22, 1998 and granted December 18, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 22, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 22, 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.