Non-return valve
CA 1078704 A · Owner: Gustav F. Gerdts Kg · Inventors: Schutzer, Gerhard
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A non-return valve is disclosed which has a valve housing,a valve seat, at least one closing part co-operating with the valve seat and mounted pivotably In the housing, and at least one closing spring held stationarily in the housing and comprising at least one pivotable operating arm which engages with the closing part. The closing spring is arranged in the inlet side of the internal chamber of the valve housing and a connecting means is provided which connects the operating arm to the closing part under tension in the direction in which the closing part pivots. The closing part and the operating arm are permitted to move relatively in the longitudinal direction of the operating arm.
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 June 3, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 3, 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.