Descending device
CA 2002779 C · Owner: Constantinis, Daniel Alexander · Inventors: Mortlock, David Michael; Constantinis, Daniel Alexander; O'Donovan, Roger
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A device whereby personnel or other loads may descend from an elevated position at a controlled and variable speed, comprising a restraining member (12) having a series of slots (13). A tape stored in a container (20) passes through the slots (13) to a hook (10) for attachment of the device to a fixed point. A user wearing a harness (21) removably attached to the restraining member (12) may descend at a controlled rate determined by a light load applied to the tape (11) below the restraining member (12) owing to the frictional contact of the tape (11) passing around the edges of slots (13). After the descent a quick release shackle (16) releases the harness (21) from the device.
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 10, 1989 and granted November 19, 1996. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 10, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 10, 2011.
- 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.