Chair
CA 1285860 C · Owner: Cross, Michael G. · Inventors: Cross, Michael G.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An invalid chair has a seat which rises (under spring or other power) at the front as well as at the back to assist the occupant to stand. The seat is mounted by means of a mechanism comprising two pairs of tracks on the frame and seat respectively, two pairs of levers forming a scissor-like linkage with lever ends carrying respective rollers running in the tracks , and torsion springs to provide the force urging the seat upwardly. A latch mechanism is provided to latch the seat down. It can be released by a sitting occupant operating a manual device under one arm When the seat rises, the back rises further than the front .
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 July 9, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 9, 2008.
- 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.