Ball valve
CA 1053649 A · Owner: Crane Canada Limited · Inventors: Liberman, Richard
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A ball valve is disclosed having improved seal life. The ball valve has a main body unit with a fluid passageway therethrough, an inlet and an outlet, one at each end of the fluid passageway and a ball closure member fitting closely within the central chamber, the ball closure member fitting closely within the central chamber, the ball closure member having a passage therethrough, the passage being smaller in diameter than the inlet or outlet. Means are provided for rotating the ball closure member to align or misalign the passage in the ball closure member with the fluid passageway in the main body unit. Two annular seals are positioned in the fluid passageway on either side of the ball …
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 1, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 1, 1996.
- 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.