Boom overload warning and control system

Details Boom overload warning and control system Boom overload warning and control system

1990-03-20

1991-10-22

Peters, Jr., Joseph F.

Traversing hoists

With haul-in line

212149, 212153, 212159, 212231, 340685, B66C 1318

Patent

active

050587528

ABSTRACT:
A boom apparatus for use in lifting and transporting a payload includes a boom pivotally mounted on a support structure and including base and outer boom sections, the outer boom section being telescopically received within the base boom section and being movable axially relative to the base boom section. Sensors are provided for sensing the total length of the boom and the total moment load experienced by the boom, and an electrical warning and control circuit generates a warning signal either when the load as sensed is greater than a first predetermined value and the total length of the boom as sensed is less than a predetermined length, or when the load as sensed is greater than a second predetermined value and the total length of the boom as sensed is greater than the predetermined length, the second predetermined value of the load being less than the first predetermined value.

REFERENCES:
patent: 3819922 (1974-06-01), Horn et al.
patent: 3893093 (1975-07-01), Paredes et al.
patent: 3987906 (1976-10-01), Kirsten
patent: 4003482 (1977-01-01), Cheze
patent: 4052602 (1977-10-01), Horn et al.
patent: 4516117 (1985-05-01), Couture et al.
patent: 4532595 (1985-07-01), Wilhelm

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