Split seat gate valve
CA 2046017 C · Owner: Warman International Ltd. · Inventors: Kimpel, Alvin A.; Owens, Brian S.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A gate valve assembly is disclosed which has two body housing members with coaxial through passages which are connected together in end-to-end relation. The housing members have a gate slot and a seat portion slot located beneath the gate slot. Resilient sealing means are located between the body housing members and are compressed by the opposed housing members to form a liquid-tight seal along the sides of the valve. Two resilient valve liners are fitted within the housing members, each has a body with a cylindrical through passage and a generally cylindrical outer surface which engages within the through passage of the housing member. The body has a planar front face and a seat portion …
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 May 31, 1991 and granted March 18, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 31, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 31, 2013.
- 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.