Apparatus and method for controlling a construction machine
CA 2185722 C · Owner: Tozawa, Shoji · Inventors: Tozawa, Shoji; Ono, Tomoaki
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The finishing precision and uniformity of hardness of a surface finished by a construction machine, such as back-hoe is improved by, modifying the targets of a position-tracking control system based on work-load applied to the end effector of the construction machine. For example compaction force of a surface, contoured by a position-tracking back-hoe can be made more uniform. This is accomplished by adjusting actuator targets, otherwise controlled on the basis of positional and speed constraints in response to a detected work load acting on the end effector. To detect work load, a hydraulic fluid pressure signal can be applied to a computer which generates target position and speed …
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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 September 16, 1996 and granted September 9, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 16, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 16, 2018.
- 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.