Emergency descent device
CA 1237400 A · Owner: Sheu, Por-Jiy · Inventors: Sheu, Por-Jiy
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
of the Invention, IMPROVED EMERGENCY DESCENT DEVICE An improved descent device including a rotating spool on which are wound cables 34 and 35 is provided with a fluid rotation-retarding means having a plurality of vane members mounted for rotation in a fluid-filled chamber 12. Each vane member is comprised of a vane shell 23 receiving a vane core 22 which is normally biassed in a radially inward direction and is extensible from the vane shell 23 by centrifugal force. The retarding force depends on the contact surfaces between the vane members and the fluid 10 which vary with centrifugal force.
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
- Granted May 31, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 31, 2005.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
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.