Through conduit valve
CA 2039641 C · Owner: Marx, Norbert · Inventors: Marx, Norbert; Genreith, Hans; Nagler, Gunter
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A double disk wedge valve the valve disk (16) of which is movable by an actuating rod (22) and is provided with a pipe bridge (23) which includes two sealing rings (24, 25) connected by way of a compensator (26) said sealing rings in the open, position of the valve (10) being urged by elastic bias against the sealing seats (14 15) of the valve housing (11), wherein said compensator (26) comprises an inner pipe section (27) and an outer pipe section (28) extending in coaxial relationship therewith. The outer pipe section (28) is fixedly joined especially welded, to both, sealing rings (24 25). Also, it has a circumferentially extending indentation (31). The inner pipe section (27) is fixedly …
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 April 3, 1991 and granted November 8, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 3, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 3, 2013.
- 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.