Pipe connection
CA 1317985 C · Owner: Elsner, Lothar · Inventors: Elsner, Lothar
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A connection for connecting lengths of pipe in end-toend relation includes a cylindrical coupling element threaded at, each end to receive a threaded coupling member. Internally the, coupling element has a frustoconical surface engageable by a corresponding surface on an annular coupling ring. Internally the coupling ring has a plurality of sharp-edged annular ribs for gripping the external surface of a pipe The clamping ring has a central helical slot extending therethrough for about four, turns, and a flat end surface facing a flat locating surface on the coupling member. The slot winds in the opposite direction to that of the threads between the coupling element and the coupling member. …
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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 May 18, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 18, 2010.
- 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.