Fail-safe overload protective system having bridge unbalance compensating means
CA 1057835 A · Owner: Allis-Chalmers Corporation · Inventors: Herwig, Warren E.; Downing, Terry R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An overload protective system continuously monitors the forward overturning moment on a counterbalanced lift truck and prevents further raising of the carriage or further forward tilting of the mast when the overturning moment is excessive. Resistance strain gage sensors mounted on a load carrying tilt jack pin which resists the overturning moment are connected in an electrical bridge which may be inherently unbalanced due to the weight of the unloaded carriage and derives a strain signal proportional to the mechanical strain in the load carrying anchor when the carriage supports a load; a high gain differential amplifier raises the level of the strain signal output from the bridge and …
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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 July 3, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 3, 1996.
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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.