Expired Canadian patentCanada
Hydraulic actuator to provide both rotary and linear motions to a movable valve
CA 1095486 A · Owner: Allis-Chalmers Corporation · Inventors: Goldman, Holliday L.; Winther, Svend E.
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A hydraulic cylinder is provided with pistons to provide both rotary and a linear motions; utilization of a built in check valve traps fluid pressure to sustain piston in a desired operating position.
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 10, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 10, 1998.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledApril 24, 1979
GrantedFebruary 10, 1981
Term endedFebruary 10, 1998
Patent numberCA 1095486 A
Classification (IPC)F16K39/06 +2 more
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.