Scroll hydraulic machine
CA 2227682 C · Owner: Kawada, Minoru · Inventors: Kawada, Minoru; Miura, Shigeki
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A scroll hydraulic machine is disclosed comprising a fixed scroll, a swirling scroll performing a revolutionary swirling motion while engaging with the fixed scroll and a, balance weight in which a distance between a center of revolution of the swirling scroll and a center of gravity of the balance weight is changed in response to a rotational speed of the swirling scroll wherein the, balance weight includes a fixed balance weight a movable, balance weight provided in the fixed balance weight and capable of moving in a radial direction of the revolutionary swirling motion, an absorbing member for preventing a collision sound when the movable balance weight is advanced towards the center of …
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.