Pressure compensated flow control system
CA 1186972 A · Owner: French, Bruce C. · Inventors: French, Bruce C.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In a pressure compensated flow control system a flow control valve has a valve element which is subjected to pulsating fluid pressure by which it is maintained in a state of dither about a mean position corresponding to the selected flow rate through the valve. The valve element is spring-biassed towards a closed position and is displaced against the spring bias by an amount which is a function of the rate at which fluid is applied on one side of the valve element and the rate at which the fluid is bled away via an orifice.
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 14, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 14, 2002.
- 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.