Axle pivot control method and apparatus for industrial vehicle
CA 2254729 C · Owner: Ishikawa, Kazuo · Inventors: Ogawa, Takaki; Ishikawa, Kazuo; Suzuki, Masakatsu
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An apparatus for controlling pivoting the rear axle of a forklift. The forklift includes forks which are lifted, and lowered relative to a body frame. A locking mechanism which includes a hydraulic damper and an electromagnetic valve, locks the rear axle to stabilize the body frame. A controller controls the locking mechanism to lock the rear axle when the fork height is at least as great as a predetermined height threshold value and the weight of a load on the fork is at least as great as a predetermined weight threshold value. The controller also controls the locking mechanism to lock the rear axle when the lateral acceleration is at least as great as a predetermined threshold value. …
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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 December 1, 1998 and granted September 16, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 1, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 1, 2020.
- 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.