Gas burner tool for purging a gas supply pipe
CA 2207370 A1 · Owner: Eaton, Timothy C. · Inventors: Eaton, Timothy C.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Purging of a gas supply line is effected using a serviceman's purging tool having a hose for attachment to the supply line with an opposite end of the hose attached to a burner nozzle carried on a support frame. The burner nozzle is arranged to generate a stream of the gases exiting from the pipe to be purged. The frame carries a receptacle for a propane torch and angles the burner of the torch so as to be directed across the stream of gas from the supply pipe. The burner from the torch thus provides combustion of the purged non-ignitable products from the supply pipe until the ignitable gas reaches the nozzle whereupon the ignitable gas is ignited indicating that the pipe is purged. The …
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 June 10, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 10, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 10, 2019.
- 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.