Earth working – Mounting for pushed tool at end of motor vehicle – Transversely mounted blade
Patent
1978-10-23
1980-05-06
Johnson, Richard J.
Earth working
Mounting for pushed tool at end of motor vehicle
Transversely mounted blade
172805, E02F 376
Patent
active
042012686
ABSTRACT:
A mechanism for angling, pitching, and tilting a dozer blade utilized in a conventional bulldozer wherein the blade is connected by means of a universal joint to the center bight portion of a C-shaped frame. A vertical mast support structure at the center of the bight portion of the frame mounts one end of the extensible links used for angling, tilting, and pitching the blade. The angling and pitching control includes a pair of piston-cylinders connected between the vertical mast and the respective sides of the bulldozer blade. The hydraulic circuitry for the cylinders simultaneously extends the piston rod of one cylinder while retracting the piston rod of the opposed cylinder to angle the blade about a vertical axis. Simultaneous extension or retraction of both piston rods causes the blade to pitch about a horizontal transverse axis. The blade is additionally connected to the top end of the vertical mast structure by a tilt cylinder which is disposed parallel to the top edge of the blade. The blade adjustment construction provides that when the blade is angled, the blade tilt is not changed. The present construction eliminates conventional complex push lever and linkage arrangements, and the operation does not require a complex hydraulic system.
REFERENCES:
patent: 3122850 (1964-03-01), Rockwell
patent: 3705631 (1972-12-01), Seaberg
patent: 3773116 (1973-11-01), Coontz
patent: 3774696 (1973-11-01), Horsch
patent: 3913684 (1975-10-01), Casey
J. I. Case Company
Johnson Richard J.
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