Shut off valve system for robotic welding devices
CA 2221202 C · Owner: Doutt, Kingsley · Inventors: Doutt, Kingsley
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A sensor and valving system for controlling the flow of liquid coolant in a welding electrode cooling circuit using coolant under pressure in supply and return lines. The system is responsive to loss of coolant to the welding electrodes by pressure response upon loss of coolant detection, the coolant supply is cut off and effective lines are isolated allowing for repair or replaceable without additional loss of coolant from the system.
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 November 14, 1997 and granted November 6, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 14, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 14, 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.