Synchrotilt chair with adjustable seat, back and energy mechanism
CA 2663687 C · Owner: Punches, Edward H. · Inventors: Heidmann, Kurt R.; Perkins, James A.; Peterson, Gordon J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A back construction for a seating unit has a back frame a compliant back including a back shell formed from a resiliently flexible polymeric sheet having a flexible forwardly- protruding lumbar support section that can be flexed to a plurality of different shapes. A force-generating mechanism is operably attached to at least one of the compliant back and the back frame. The force-generating mechanism is constructed to provide a biasing force that biases the lumbar support section forward to provide support for a seated user's back. The force-generating mechanism characteristically provides the biasing force without forcing a shape change in the compliant back.
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 October 19, 1998 and granted January 17, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 19, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 19, 2020.
- 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.