Power actuated valve
CA 1048477 A · Owner: Parker And Harper Manufacturing Company · Inventors: Holloway, David G.; Massey, Roger G.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A power actuated ninety degree rotation valve in which the power actuator is coupled to the valve stem by a socket which simultaneously engages a lug fixed with the valve stem and a nut threaded to said valve stem so that the nut cannot loosen during actuation of the valve.
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 February 13, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 13, 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.