Pipe joint and pipe with pipe joint
CA 2023087 A1 · Owner: Ishihara, Toshio · Inventors: Ishihara, Toshio; Akiyama, Hiroshi; Nakano, Takashi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention provides a pipe joint and a pipe with the pipe joint. The pipe joint has a coupling element of the male and the female parts, and a contact surface wherein the male and the female parts are contacted. Adjacent to the contact surface a groove which contains an O ring is provided wherein the O ring deforms regularly under hydraulic pressure by the effect of the contact surface which leads to the enhancement of the sealing capacity of the joint. The groove of the joint may be provided on one of the male and the female joints. The material may be metal, plastic, and fiber reinforced plastic. A pipe with the pipe joint can be applicable to the purpose of the invention.
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 August 10, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 10, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 10, 2012.
- 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.