Seat support for office chairs or the like
CA 2203193 C · Owner: Hirschmann, Manfred · Inventors: Hirschmann, Manfred
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An office chair seat carrier or support includes a seat platform earner and a back, rest carrier pivotally connected about parallel rotatable axes to a carrier part. A stack, of lamellar disks is pivotally connected between the earner part seat , platform carrier, and back rest carrier for holding the carriers in place by frictional contact. The stack, of lamellar disks is linked with a holding member rigidly attached to the carrier part. Frictional contact is established by activating an actuator lever which slides a clamping, member against the stack of lamellar disks. The clamping member applies a lateral, clamping force upon the stack of lamellar disks forcing the disks together. …
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 12, 1995 and granted April 18, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 12, 2015.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 12, 2017.
- 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.