Pipeline packer
CA 1292704 C · Owner: Dowasue Industries Ltd. · Inventors: Campbell, Douglas C.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The pipeline packer described herein typically includes a main body adapted for propulsion through the pipeline in an axial direction. A brake shoe support assembly is located on the main body and a plurality of circumferentially spaced brake shoes capable of gripping the interior wall of the pipeline are mounted to the support assembly. Fluid pressure activated means are associated with the bake shoe support assembly for urging the brake shoes radially outwardly into griping engagement with the pipeline to secure the main body in a desired location in the pipeline against the pipeline pressure forces acting thereon. A pair of annular wedging means are also mounted to the main body for …
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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 December 3, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 3, 2008.
- 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.