Means for introducing inspection equipment in active pipelines
CA 2038174 A1 · Owner: Mcnulty, George R. · Inventors: Luff, Charles E.; Mcnulty, George R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method and apparatus for internally, inspecting a relatively small diameter live pipeline with a camera introduced into an elongated hole cut into the wall of the pipeline at a strategic location. A housing formed by a pair of opposed oblique nipples is secured to the pipe and a rotary cutter is operated successively through the nipples to produce the elongated hole. The camera is introduced successively through each of the nipples to scan both upstream and downstream of the location of the elongated hole. The oblique orientation of the nipples simplifies the elongated hole forming operation and reduces flexural stresses on a cable used to propel the camera through 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 March 13, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 13, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 13, 2013.
- 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.