Flexible seating structure for rotary valves
CA 2084381 A1 · Owner: Henry Pratt Company · Inventors: Kurkjian, Gregory A. Jr.; Kurkjian, Gregory A. Jr.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A flexible seating apparatus is disclosed for use in rotary valves comprising a flexible seat ring attached to one of the valve body and valve closure member in a cantilevered fashion and maintained against the other of the valve body and valve closure member by pressurized fluid forces during closure. A resilient seal member is positioned between the flexible seating ring and that one of the valve body and valve closure member to which it is attached. Slotted fastener holes spaced radially along the flexible seat and corresponding fasteners permit automatic axial adjustment and proper positioning of the flexible seat ring upon assembly and initial closure of the valve's closure member. An …
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 December 2, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 2, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 2, 2014.
- 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.