Rotatable pipe coupling structure
CA 1061827 A · Owner: Grace, George A. · Inventors: Grace, George A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The specification describes a rotatable multiple pipe coupling structure employing a labyrinth seal between each stationary pipe and its respective rotatable pipe. Because of no protruding parts from inner pipes into the channels, there will be minimized turbulence in the fluids to be transferred through the rotatable multiple pipe coupling structure. There is also described a rotatable pipe coupling structure having a stationary pipe and a corresponding rotatable pipe. The pipes are rotatably sealed with a labyrinth seal. The coupling structures according to this invention may be further provided with a driving shaft longitudinally and centrally extending therethrough. The coupling …
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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 September 4, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 4, 1996.
- 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.