Quick disengaging valve actuator
CA 1069018 A · Owner: Baker International Corporation · Inventors: Akkerman, Neil H.; Foster, Stephen R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An actuator is provided which is respondable to control fluid pressure for moving an operative means of a valve between open and closed positions. The actuator comprises a housing having a cylindrical bore defined therethrough. A shaft is carried in the housing and is engagable with the operative means. Piston means are carried by one of the shaft and the housing and are sealingly slidable along the other of the shaft and the housing and longitudinally movable within the cylindrical bore. Fluid chamber means are companionly associated with the piston for yielding a differential force across the piston means upon variation of fluid control pressure within the actuator. The shaft is …
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 January 1, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 1, 1997.
- 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.