Method and apparatus for monitoring the effective load carried by a crane
CA 1297552 C · Owner: Nield, Barry J. · Inventors: Nield, Barry J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This is a method of apparatus for monitoring the effective load carried by a crane having a luffing boom of variable effective length. The method includes generating a signal corresponding to the magnitude of the load supported by the boom and then a second signal corresponding to the effect of the radius. Calculations are made to calculate a load/radius value and displaying same. This is then compared with a predetermined maximum permissible load/radius value and a warning signal is generated it if differs from the maximum load radius value by less than a predetermined amount. The apparatus provides apparatus for carrying out the method by generating a false signal corresponding to the …
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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
- Granted March 17, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 17, 2009.
- 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
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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.