Apparatus for opening and closing a fluid conduit
CA 1088909 A · Owner: Paul Wurth S.A. · Inventors: Mailliet, Pierre; Ulveling, Leon
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An apparatus for opening and closing a fluid conduit of the type which extends in a substantially vertical direction above an enclosure, the diameter of the enclosure being greater than the diameter of the fluid conduit. The fluid conduit or pipe includes a transverse slit to provide for movement of a shut-off valve therethrough to open and close the pipe the fluid, circulating through the fluid conduit having a tendency to escape through the transverse slit to the environment external to the pipe. Since it is desirable to hermetically seal the valve, a frame is provided which is completely integrated with the upper part of the enclosure and which is a prolongation of the walls of the …
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 November 4, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 4, 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.