Uni-directional/bi-directional gate valve
CA 1269652 C · Owner: Barrington, Claud C. · Inventors: Barrington, Claud C.; Wafer, Don B.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A uni-directional/bi-directional sealing gate valve comprises a valve body with a float passage and a valve gate chamber intersecting the flow passage. A valve gate in the chamber controls fluid flow through the valve. The gate has a flow passage extending therethrough for cooperation with the body flow passage to permit fluid flow through the valve when the gate is in a first position. When the gate is in each of second and third positions, a device prevents fluid flow through the valve. A fluid tight seal is provided between the valve gate and the valve flow passage. A pressure relief is provided in the valve gate for permitting escape of pressure from the gate chamber into the body flow …
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
- Granted May 29, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 29, 2007.
- 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.