Gas lockout system
CA 2118949 A1 · Owner: Pgi International, Ltd. · Inventors: Nimberger, Spencer M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A propane gas distribution system according to the present invention substantially enhances safety by providing a gas lockout device within the enclosure containing the distribution lines to the propane appliances for closing off a gas distribution line in response to either a sensed low pressure level or a sensed high pressure level. The closure member within the lockout device is biased closed but is, normally prevented from closing by a stop member which in turn is held in position until the unsafe low pressure or unsafe high pressure condition exists. A security control member is utilized for restricting the re-opening of the lockout device to select personnel which typically would be a …
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 14, 1994. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 14, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 14, 2016.
- 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.