Valve member for pilot operated valves
CA 1085802 A · Owner: Automatic Switch Company · Inventors: Fromfield, James P.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure, A valve member including a flexible diaphragm (16') movable into and out of engagement with a valve seat (14') to close and open the valve, respectively. A rigid support plate (19') rests against the face of the diaphragm opposite the face which engages the valve seat. A stem (36) projects from the plate, through a hole (35) in the diaphragm and into the orifice (13') surrounded by the valve seat. The diaphragm and plate are not rigidly secured together so that, the entire diaphragm is free to flex with respect to the support plate. A pilot passageway (26') may extend completely through the plate and stem. The stem is long enough such that the lower end of the …
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 September 16, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 16, 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.