Earth working – Scraper between front and rear ground supports of vehicle – Specific actuator between frame and scraper
Patent
1976-08-30
1978-02-21
Stouffer, Richard T.
Earth working
Scraper between front and rear ground supports of vehicle
Specific actuator between frame and scraper
172484, 172742, E02F 376
Patent
active
040747689
ABSTRACT:
A motor grader comprises a tractor having a frame extending forwardly therefrom and supported on a plurality of road wheels. A first bracket is universally connected to the frame and is pivotally connected to a second bracket, disposed forwardly thereof, by a parallelogram-type linkage. A double-acting hydraulic cylinder is pivotally interconnected between the first and second brackets to selectively pivot the second bracket relative to the first bracket and to maintain the brackets in parallel relationship relative to each other. A mold board is mounted for lateral sliding movements on a support member pivotally connected to a forward end of the second bracket. A pair of cylinders are pivotally interconnected between the second bracket and the support member to selectively pivot the support member and mold board relative to the second bracket. A pair of generally vertically disposed cylinders are pivotally interconnected between the frame and the second bracket to selectively raise and lower the second bracket and attached mold board relative to ground level. The mold board may be moved relative to the support member by a cylinder pivotally interconnected therebetween and another cylinder is interconnected between first and second pivoted parts of the support member to selectively tip the mold board.
REFERENCES:
patent: 2147631 (1939-02-01), Arndt
patent: 2195607 (1940-04-01), Wilson et al.
patent: 3454110 (1969-07-01), Hanser
patent: 3568778 (1971-03-01), Swisher, Jr. et al.
Caterpillar Tractor Co.
Stouffer Richard T.
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