Lever apparatus having a freely movable fulcrum and mechanical apparatus using the same
CA 2034005 C · Owner: Yoshiki Industrial Co. Ltd. · Inventors: Yoshizawa, Yasuo; Kato, Mitsuo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A movable fulcrum type lever apparatus comprising a lever member pivotally supported by a movable fulcrum. One end of the lever member is connected to a force point regulator, and the other end is connected to an action point regulator. The fulcrum includes a roller which is in rolling contact with a fulcrum guide groove of a fulcrum guide member, and the lever member is pivotally supported on a roller shaft. Alternatively the fulcrum, includes a slider inserted in the fulcrum guide groove. In this case the lever member is pivotally supported on the slider.
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 6, 1990 and granted July 12, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 6, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 6, 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.