Variable rack adjustment assembly for pipe spinning machines
CA 2452149 A1 · Owner: Hawk Industries, Inc. · Inventors: Perez, Raul Hector; Hauk, Thomas D.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A cam-operated, rack-on-rack adjustment assembly on a drill pipe spinner allows the user to easily and in small increments (distances) (three-eighths inch, one-, quarter inch or less, or more) adjust the effective pipe engaging length of the drive, chain. In other words, the effective length of chain wrap (the amount that grips the pipe), given the pipe size can be adjusted.
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 December 5, 2003. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 5, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 5, 2025.
- 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.