Differential pressure relief valve
CA 1085262 A · Owner: Braukmann Armaturen Ag · Inventors: Braukmann, Heinz W.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A differential pressure relief valve formed of a housing having first and second chambers sealed from the atmosphere and separated by an annular diaphragm with the chambers and the annulus of the diaphragm traversed by a moveable sleeve. The first chamber communicates to a primary pressure source through a first channel in the housing and the second chamber communicates to a secondary pressure source through holes provided in the sleeve and then to a second channel in the housing. The end of the sleeve protruding from the second chamber is engageable with a seat in the housing. The arrangement is such that when the primary pressure exceeds the secondary pressure by a predetermined amount …
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 9, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 9, 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.