System for establishing a sealing connection between two axially impacting members in a pipe conduit
CA 2006674 C · Owner: Framo Engineering A/S · Inventors: Hjertholm, Ole G.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A system for establishment of a sealing connection between two axially impacting members (10,11) in a pipe conduit, has an intermediate, elastically yielding metal sealing ring (59) arranged in a groove between the members. The sealing ring (59) is made of highly elastic rust-free steel and designed wedge-shaped. By prestressing the sealing ring between the members sealing engagement of the sealing ring is ensured. During use the sealing ring is adapted to be moved radially outwards in the associated groove and thereby compensates for tendencies to the opening of the gap between the members with the occurence of high medium pressures in the pipe conduit. After cessation of the high …
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 December 27, 1989 and granted July 2, 1996. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 27, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 27, 2011.
- 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.