Annular blowout preventer
CA 1059435 A · Owner: Cameron Iron Works · Inventors: Jones, Marvin R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
There is disclosed an assembly for use in an annular blowout preventer of the type wherein a packer received, within a recess about a bore through the preventer housing is, adapted to be contracted by means of a piston having an annulus of resilient material movable inwardly within a chamber surrounding the recess and divided therefrom by a wall of the housing, and a disc-shaped member of resilient material extending through and sealably slidable within a slot in the wall to transmit the inward movement of the piston to the packer. The assembly comprises a packer and piston of particular design also means of particular design interconnecting the piston and packer.
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 July 31, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 31, 1996.
- 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.