Power tong with sliding jaw
CA 2384050 A1 · Owner: Mccoy Bros. Inc. · Inventors: Fraser, Jonathan Brent; Basler, Hermann; Dagenais, Dan
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A power tong or back-up tong has a sliding jaw assembly that may be advanced into the throat of the tong for engagement with a pipe. A camming surface on the inside circumference of the ring gear advances the sliding jaw assembly into full engagement with the well pipe when the ring gear is rotated with respect to the jaw assembly.
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 April 30, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 30, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 30, 2024.
- 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.