Diaphragm actuated air cycle valve
CA 2248259 C · Owner: Lucas, Clive D. · Inventors: Sabet, Ahmed I.; Lucas, Clive D.; Armour, Jeffrey C.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An actuated air valve includes a valve body (12) in line with a flow passage (14) for admitting a flow of fluid. A valve member (16) is pivotally mounted about the centerline of the valve body and is pivoted between high flow and low flow positions. A diaphragm (26) and linkage (20 22) is in mechanical , connection to the valve member. A pressure tap from the flow of fluid provides an impulse to the diaphragm which displaces the linkage thus varying the , position of the valve member. A three-way solenoid valve (34) is used to selectively admit the impulse to the diaphragm thus governing the , displacement of the linkage and thereby varying the position of the valve member.
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
- Filed February 12, 1997 and granted January 29, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 12, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 12, 2019.
- 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.