Handle assembly for chair control mechanism
CA 2019521 C · Owner: 1012697 Ontario Limited · Inventors: Stumpf, William S.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A chair control mechanism of the type having a seat support member pivotally mounted on a leg mounting member and a, spring loaded adjustment mechanism for controlling the pivotal movement of one member with respect to the other. The adjustment mechanism includes a handle mounted on an adjustment screw for movement therealong to compress or allow extension of the compression spring. A nut is threadedly mounted on the adjustment screw and serves to retain the members adjustment, screw and spring in an assembled configuration during shipping to and assembly of a chair by a chair manufacturer. A hand wheel is provided for attachment to the nut after the control mechanism has been assembled and …
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 June 21, 1990 and granted November 15, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 21, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 21, 2012.
- 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.