Motor grader drawbar assembly with fluid-operated cylinders for

Details Motor grader drawbar assembly with fluid-operated cylinders for Motor grader drawbar assembly with fluid-operated cylinders for

1975-07-09

1976-11-02

Stouffer, Richard T.

Earth working

Scraper between front and rear ground supports of vehicle

Specific actuator between frame and scraper

91 44, 91 45, 172742, 188 74, 192 3N, E02F 385

Patent

active

039891127

ABSTRACT:
The motor grader drawbar assembly has a blade mounted on a circle gear and a drive unit operatively connected to the circle gear to selectively rotate it and the blade. A plurality of radially mounted pistons operate against an upright wall of the circle gear to provide a brake and/or locking mechanism. The pistons, and their accompanying cylinders, are mounted in members which also underlie and support the circle gear. Thus, the vertical position of the circle gear is not affected by the braking operation. A hydraulic circuit is provided to alternately operate the drive unit and the braking operation.

REFERENCES:
patent: 2089730 (1937-08-01), Brown et al.
patent: 2928381 (1960-03-01), MacDonald
patent: 3593806 (1971-07-01), Gurries
patent: 3712384 (1973-01-01), Fisher
patent: 3819018 (1974-06-01), Muller et al.

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