Load moment sensing system for lift trucks

Details Load moment sensing system for lift trucks Load moment sensing system for lift trucks

1976-06-30

1978-06-06

Hoffman, Drayton E.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

340267C, B65G 4700

Patent

active

040930912

ABSTRACT:
An improved load moment sensing system for a lift truck having tilt and lift cylinders for tilting a mast and lifting a carriage on the mast, respectively. A sensor is provided for sensing the load moment placed on the frame and a sensor is provided for determining when the carriage is elevated on the mast. A logic system is responsive to the sensors for preventing actuation of the tilt and lift cylinders simultaneously when an overload is sensed while allowing rearward tilting only when an overload has been sensed and when the carriage is elevated. The system also prevents tilting forwardly when an overload has been sensed and when the carriage is elevated. The system also allows tilting forwardly when an overload has been sensed and the carriage is not elevated.

REFERENCES:
patent: 2751994 (1956-06-01), Remde
patent: 3831492 (1974-08-01), Young
patent: 3850322 (1974-11-01), Ekstrom
patent: 3866200 (1975-02-01), Paredes et al.
patent: 3960286 (1976-06-01), Spooner et al.
patent: 3993166 (1976-11-01), Senour
patent: 4003487 (1977-01-01), Downing

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