Variable bore packer for a ram type blowout preventer
CA 2023212 C · Owner: Cooper Industries, Inc. · Inventors: Mcwhorter, David J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A packer for use with a ram-type blowout preventer which has the capacity to accommodate a plurality of sizes of tubular members extending through the bore of the blowout preventer, the packer having a resilient body to fit the face recess of the ram and a central recess to receive a tubular member, an upper plate positioned in the upper portion of the resilient body, a lower plate positioned in the lower portion of the resilient body, a plurality of metal insert segments positioned between the upper surface of the resilient body and the under surface of the upper plate and around the central recess of the resilient body, the metal insert segments having sufficient length to engage the …
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 14, 1990 and granted March 26, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 14, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 14, 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.