Non-return valve
CA 1183061 A · Owner: Sulzer Brothers Limited · Inventors: Tiefenthaler, Edelbert
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A b s t r a c t, The non-return valve comprises a housing (2) provided with an outlet connection (4), an inlet connection (3) and opposite the latter, a coaxial installation opening (5). An insert (10) is secured in the latter which is closed, by a cover (7), and together with the latter defines a chamber disposed coaxially of the inlet connection (3). A piston (25) is arranged for displacement in this chamber and divides the chamber into two cylindrical chambers (15 15') and has one end of a valve spindle (22) secured to it. At the other end of the valve spindle (22) is a valve plate (50) co-operating with a valve seat (53) provided in he housing (2) near the inlet connection (3). …
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 February 26, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 26, 2002.
- 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.