Compressor valve
CA 2211268 C · Owner: Dover Resources, Inc. · Inventors: Bassett, H. Eugene
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An intake or exhaust valve of a compressor comprises a seating plate (10) and a guard plate (12). The seating plate (10) has a plurality of clusters (66 68) of holes (16) extending through the seating plate (10) the holes (16) of , each cluster (66, 68) being arranged along a respective circular locus and communicating with respective seating surfaces (72 74) opening through an , inner surface (70) of the seating plate (10). The guard plate (12) defines a respective stop surface (89) spaced from the seating surfaces (72 74). A , respective annular seal ring (20) reciprocates between each stop surface (89) and the respective opposed seating surfaces (72 74). A plurality of springs , (22) …
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 October 31, 1995 and granted August 27, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 31, 2015.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 31, 2017.
- 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.