Blowout preventer
CA 1300004 C · Owner: Wilson, James A. · Inventors: Wilson, James A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A blowout preventer for use on wellheads for sealing around tubing strings, polished rods, and wirelines including a body, having a bore therethrough and connectable on a wallhead integral laterally opposed side chambers in the body a closure, cap over each of the side chambers an operating screw through, each of the closure caps a seal assembly in each of the side, chamgers adapted to come together in the bore of the body to seal off flow through the body, each of the seal assemblies including a ram plate having only an upper backup plats and side retainer walls, and an elastic seal supported on each ram plate below the backup plate inside the retainer walls adapted to compress, together …
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
- Granted May 5, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 5, 2009.
- 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.