Device for controlling the attitude of an implement drawn by an

Details Device for controlling the attitude of an implement drawn by an Device for controlling the attitude of an implement drawn by an

1990-11-30

1993-01-12

Taylor, Dennis L.

Earth working

Automatic power control

Draft responsive

172 7, 172239, 172261, 7386257, A01B 63112, A01B 63111

Patent

active

051782200

ABSTRACT:
The device is mounted in an agricultural machine comprising two links for drawing an implement, a lifter member and a central control unit for controlling the member. The device comprises: two horizontal bars carried in the form of brackets from the chassis of the machine; and four resistive elements deposited on flat faces of the bars symmetrically with respect to a neutral axis defined in this latter, made of a material having an electrical resistance proportional to the deformations to which they are subject and connected in a Wheatstone bridge circuit in such a way such that this arrangement generates an electrical signal proportional to the imbalance of the bridge caused by the deformations to which the elements are subjected, and which are transmitted from the traction force on the implement.

REFERENCES:
patent: 4215570 (1980-08-01), Eer Nisse
patent: 4367656 (1983-01-01), Fritsch
patent: 4456074 (1984-06-01), Prudenziati
patent: 4612995 (1986-09-01), Benedek et al.
patent: 4640368 (1987-02-01), Kittle et al.
patent: 4721001 (1988-01-01), Hesse et al.
patent: 4735103 (1988-04-01), Mussard et al.
patent: 4858475 (1989-08-01), Jacobson
patent: 4932253 (1990-06-01), McCoy

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