Suspension for seat of powered wheelchair
CA 2094262 A1 · Owner: Invacare Corporation · Inventors: Quintile, Mark J.; Curran, Neal J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A suspension system for a wheelchair comprises a frame (14) a, pivot bar (26) mounted to the frame through a hinge point and a, seat (32) mounted on the pivot bar. The pivot bar is supported from the frame by a shock absorber (28) and a helical spring (30) so that impacts transferred to the frame through the wheelchair wheels (10, 12) are partially decoupled from the movement of the seat. The movement of the seat is constrained in a single plane along the longitudinal axis center line (CL) of the wheelchair.
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 13, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 13, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 13, 2013.
- 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.