Union joint
CA 1202341 A · Owner: Hitachi Metals, Ltd. · Inventors: Watanabe, Nobuyuki; Wanda, Nobuo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A union joint for jointing pipes comprises a union head having a male screw thread formed on the outer peripheral surface of axiall inner and portion thereof and provided at its end with a seat member made of a non-ferrous material, a union tail piece having a collar on the outer peripheral surface of the inner axial end thereof and provided at its end with a sealing surface constituted by a part of a sphere having an arcuate axial cross-section, and a union nut provided at its front inner portion with a female screw thread and at its rear portion with an inwardly projecting jaw. The union nut is adapted to be screwed to the union head through screwing engagement between the female screw in …
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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 March 25, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 25, 2003.
- 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.