Frame assembly for a chair
CA 1280348 C · Owner: Faultless-Doerner Manufacturing Inc. · Inventors: Dicks, Peter
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A frame assembly for a chair includes a base member a, seat support member and a backrest member. The front end of the seat support member is pivotally mounted on the front end of the base member a seat suspension spring is provided for the purposes of urging the seat support member to its elevated position. The seat suspension spring is mounted at a point spaced a substantial distance from the pivotal connection between the base and the seat support. Preferably, the suspension spring is a compression spring mounted rearwardly of and extending longitudinally of the backrest member so as to enjoy a substantial mechanical advantage.
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 February 19, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 19, 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.