Valve seat structure
CA 1162178 A · Owner: Acf Industries, Incorporated · Inventors: Shelton, William S.; Meyer, Danny S.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Case 232S, ABSTRACT OF THE DISCLOSURE, A valve seat structure for an expanding type gate valve. A valve seat is received in each annular seat recess formed around the upstream and downstream flow passages and opening to the valve chamber wherein a gate assembly is movable between open and closed positions. An annular face seal is mounted within an annular groove in the front seat face of each valve seat. A substantial portion of the bottom of the annular groove comprises a frusto-conical bottom portion which forms a wedging surface with a cone angle in the range of approximately 30° to 60° and disposed substantially coaxial with the groove sides and the flow passages. The rear seal face of …
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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 February 14, 1984. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 14, 2001.
- 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.