Torque transfer apparatus
CA 2097089 C · Owner: Frank'S Casing Crew And Rental Tools, Inc. · Inventors: Bouligny, Vernon; Sibille, Mark
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An apparatus for making up of breaking out of two members having mating threaded connections, such as pipe joints or bolts for avoiding undesirable transverse forces relative to the two members during tightening (or loosening), thereby insuring the connection is made up (or broken out) by essentially pure torque loads. A power-driven lead tong rotatingly drives a first threaded member out of its axis. A back-up tong secures a second threaded member against axial rotation in response to the rotation of the first member. An interconnecting frame and isolation apparatus adapts the lead tong to the back-up tong in such a manner that their relative tendencies to rotate about the threaded …
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 26, 1990 and granted February 10, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 26, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 26, 2012.
- 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.