Method and apparatus for indicating effective digging depth of a

Details Method and apparatus for indicating effective digging depth of a Method and apparatus for indicating effective digging depth of a

1975-08-14

1976-12-14

Paperner, L. J.

Traversing hoists

Overhead

Cable

37DIG19, 212 39MS, 235186, 340267C, G08B 522, E02F 926

Patent

active

039970710

ABSTRACT:
In a backhoe of the type having an outreach boom horizontally pivotally mounted relative to a vehicle, a downreach boom horizontally pivotally mounted to the free end of the outreach boom, and a digging bucket horizontally pivotally mounted to the free end of the downreach boom, apparatus is provided for respectively generating signals proportional to the angle between the outreach boom and the horizontal, the angle between the outreach boom and the downreach boom, and the angle between the downreach boom and a line drawn to the digging teeth of the bucket. Such signals are combined according to a trigonometric equation to provide a continuous signal and visual indication proportional to the depth of the digging teeth of the bucket relative to the horizontal pivotal mounting axis of the outreach boom on the vehicle. In accordance with a modification, the absolute elevation of the digging teeth of the backhoe bucket is determined and indicated by measuring the absolute elevation of the pivotal mounting axis of the outreach boom relative to a reference plane defined by a rotating laser beam.

REFERENCES:
patent: 3346724 (1967-10-01), Fuhrmeister et al.
patent: 3347398 (1967-10-01), Smith
patent: 3505514 (1970-04-01), Fathauer
patent: 3549876 (1970-12-01), Hamilton
patent: 3819922 (1974-06-01), Horn et al.
patent: 3825808 (1974-07-01), Leach
patent: 3833932 (1974-09-01), Hamilton
patent: 3924452 (1975-12-01), Meyer et al.
patent: 3932855 (1976-01-01), Hamilton

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