Emergency tree and height descender
CA 2264992 A1 · Owner: Walker, George K. · Inventors: Walker, George K.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A compact, lightweight, self contained rappel apparatus by which a person such as, a parachuting smoke jumper, aviator or other person may safety descend a line or rope, from a tree canopy or other high perch to the ground or a lower elevation. The invention, is designed for one-handed use with a preferred figure 8 system of descent line reeving, around and about the top pipe and bottom pipe of the descender that results in multiple, frictional line-to-line contact points as the line crosses itself in each figure 8 wrap in the, area between the top pipe and bottom pipe.
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 March 5, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 5, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 5, 2021.
- 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.