Pilot operated fluid valve
CA 2187601 C · Owner: Katzman, Yuval · Inventors: Katzman, Yuval
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A gas purge valve comprising a housing provided with an inlet for connecting to a liquid system to be purged. A flexible diaphragm formed with an aperture of restricted dimension is maintained in the housing dividing it into first and second chambers the first chamber communicating with the inlet. A pilot valve controlled first outlet is formed in the second chamber and a second outlet is formed in the first chamber. There is also provided a diaphragm seating formed in the first chamber being engageable by said diaphragm so as to seal said second outlet; the arrangement being such that the pilot valve is displaceable between a first position in which gas is discharged from the second …
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 October 10, 1996 and granted June 13, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 10, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 10, 2018.
- 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.