Combined preheat and cutting oxygen valve for cutting torches
CA 2212159 C · Owner: Lincoln Global, Inc. · Inventors: Endfield, Randy C.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The valve body of a gas torch is provided with a combined preheat oxygen and cutting oxygen valve unit in which the respective valves are coaxially interengaged and mounted in a single bore provided therefor in the valve body. The preheat oxygen valve is rotatable relative to the bore to control the flow of preheat oxygen to the torch tip and the cutting oxygen valve is axially displaceable relative to the preheat oxygen valve to control the flow of cutting oxygen to the torch tip. The preheat oxygen valve includes an operating knob by which the valve is rotated and which knob is disposed beneath a pivotal operating lever by which the cutting oxygen valve is operated.
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 July 30, 1997 and granted March 27, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 30, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 30, 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.