Rotary valve and seal
CA 2022784 C · Owner: Bruggestrath, Bernd · Inventors: Adams, Horst Heinz; Kappe, Rudolf August; Bruggestrath, Bernd
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A rotary valve assembly having a housing a valve, member and a seal assembly. The seal assembly has at least one seal subassembly with two resilient sealing elements, each having a substantially linear section and a curved section formed integrally with the linear section. The linear and curved sections of the two sealing elements are disposed adjacent each other. The two resilient sealing elements may have different resiliency characteristics.
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 August 7, 1990 and granted November 8, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 7, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 7, 2012.
- 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.