Counter-balancing mechanism
CA 2437590 C · Owner: Ronford-Baker Engineering Company Ltd. · Inventors: Lawrence, Jeffrey
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A counter-balancing mechanism comprising a support for supporting an article to be tilted about a horizontal axis; a cam movable with the support the cam , surface , of which varies in a direction normal to the plane of rotation of the support; and a cam , follower loaded by a resilient means whereby as the support rotates, the cam , follower and resilient means causes a return force to be exerted to substantially counteract the , torque caused by the rotation of the support. Preferably a means for varying , the , return force in accordance with a load on the support is provided wherein the , cam and , resilient means is able to rotate about a centre offset from the central axis about …
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 February 8, 2002 and granted January 31, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 8, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 8, 2024.
- 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.