Bristle pig cup
CA 1255460 A · Owner: Knapp, Kenneth M. · Inventors: Knapp, Kenneth M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure For use with a mandrel supporting a plurality of cups an improved pipeline pigging cup is set forth in the preferred and illustrated embodiment. The cup is equipped with a large protruding lip around the periphery, and has a reinforcing member in the lip to secure the lip in a resilient fashion against the surrounding pipeline. The reinforcing member is formed of a strip of cloth backing with upstanding staples in the form of a multitude of small staple tips; the tips are arranged at or near the surface of the lip, thereby defining an abrasion resistant surface.
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 June 13, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 13, 2006.
- 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.