Earth working – Mounting for pushed tool at end of motor vehicle – Transversely mounted blade
Patent
1981-09-04
1983-09-20
Johnson, Richard J.
Earth working
Mounting for pushed tool at end of motor vehicle
Transversely mounted blade
172821, 172826, 172827, E02F 376
Patent
active
044050194
ABSTRACT:
A mechanism for angling, pitching, and tilting a dozer blade utilized in a conventional bulldozer wherein the blade is pivotally connected by an angling frame to the forward ends of push arms. A tilt-pitch control assembly for the blade is provided including a pitch cylinder, a pitch-tilt cylinder, a torsion bar, and drag link connections. The pitch cylinder and pitch-tilt cylinder are each pivotally attached to the torsion bar by the drag link connections. If a load is applied against one side of the blade, the load is transmitted to the pitch cylinder or pitch-tilt cylinder closest to the loaded side of the blade thereby causing some movement of that cylinder. The cylinder which is under load transmits any movement through its respective drag link connection into a turning movement on the torsion bar. This turning movement on the torsion bar is, in turn, transmitted to the opposite side of the blade and to the unloaded cylinder which provides support to the loaded cylinder for counteracting any uneven or undistributed loads on the blade. The pitch-tilt cylinder includes opposed extensible piston rods for providing maximum blade tilt at all pitch positions of the blade. This overcomes the problem of having no tilt cylinder stroke available to tilt the blade when the blade is fully pitched forwardly or rearwardly. Thus, the present construction provides for maximum blade tilt at all pitch positions of the blade and a stabilizing arrangement to prevent the blade from following the path of least resistance when uneven loads are applied to the blade.
REFERENCES:
patent: 1923412 (1933-08-01), Bacon
patent: 1974520 (1934-09-01), Stewart
patent: 1977817 (1934-10-01), Bird
patent: 3158944 (1964-12-01), Rehberg
patent: 3661215 (1972-05-01), Pensa
patent: 3773116 (1973-11-01), Coontz
patent: 4076080 (1978-02-01), Anderson
patent: 4133392 (1979-01-01), Freese
patent: 4244429 (1981-01-01), Nissen
J. I. Case Company
Johnson Richard J.
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