High pressure water jet cleaner and coating applicator
CA 2017972 C · Owner: Crc-Evans Rehabilitation Systems, Inc. · Inventors: Rogala, Stanley J.; Taylor, Sidney A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract, An automated pipeline rehabilitation apparatus is disclosed. The apparatus employs a centering assembly with pivoting arms which can pivot between an operating position and a installation/removal position to allow the unit to be removed from a pipeline. Arcuate rings are mounted on the arms. Spray nozzles are mounted on the arcuate rings for reciprocating arcuate motion along the rings to treat the pipline. The nozzles can be used to clean the pipeline and prepare the outer surface of the pipeline with high pressure water jets in training abrasives. The nozzles can also be used to apply a coating, preferably a polyurethane coating to the pipeline.
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 May 31, 1990 and granted November 9, 1993. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 31, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 31, 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.