Cleaning pig with debris flushing action
CA 1288554 C · Owner: Ralls, Gene R. · Inventors: Ralls, Gene R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A CLEANING PIG WITH DEBRIS FLUSHING ACTION" Abstract of the Invention, A cleaning pig for use in a pipeline to be moved through the pipeline by the flow of fluid therethrough the pig being formed of a cylindrical body having shallow depth channels formed in paralleled spiral patterns on the cylindrical surface, and an elongated, narrow brush, member positioned in each of the channels each of the, brush members having bristles which extend generally radially outward from the pig body, the width of the brush members being less than the width of the channels providing fluid flow passageways within each of the channels permitting fluid to flow past the pig as it is moved through a pipeline to …
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 September 10, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 10, 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.