Self-release choker hook
CA 2134390 A1 · Owner: Forest Engineering Research Institute Of Canada · Inventors: Ewart, James M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A choker hook has a main body and a latch member rotatable relative to said main body. The latch member is biased by a spring thereby to form a pocket to hold the ferrule of a choker cable used in logging operations. The latch member has a toe piece which will contact the surface of a log when the choker hook is rotated by the choker cable relative to the log. The force between the toe piece and its attached latch member will tend to rotate the latch member relative to the main body when the effect of the force on the choker hook is such that the toe piece is brought into contact with the outside of the log. The ferrule pocket will open and the ferrule and attached cable will be released …
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 October 26, 1994. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 26, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 26, 2016.
- 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.