Earth working – Scraper between front and rear ground supports of vehicle – Specific actuator between frame and scraper
Patent
1976-09-17
1978-04-18
Stouffer, Richard T.
Earth working
Scraper between front and rear ground supports of vehicle
Specific actuator between frame and scraper
91447, 172719, 172747, E02F 376
Patent
active
040846440
ABSTRACT:
A motor grader including a main frame mounted on steerable wheels, a drawbar frame mounted on the main frame, a working implement carried by a circle gear rotatably mounted on the drawbar frame and a hydraulic control circuit is described. An improvement in the control of the working implement is disclosed in which continuous downward force is exerted on the circle gear at all times during operation by hydraulic rams. Preferred embodiments of the invention are described wherein the force is exerted by hydraulic means including wear surfaces in contact with the circle gear and wherein the hydraulic control circuit is adapted to provide automatic operation.
REFERENCES:
patent: 3304100 (1967-02-01), Long
patent: 3381587 (1968-05-01), Parquet
patent: 3593806 (1971-07-01), Gurries
patent: 3618427 (1971-11-01), Schoepe
patent: 3943824 (1976-03-01), Fletcher
patent: 3980000 (1976-09-01), Iijima et al.
patent: 3984910 (1976-10-01), Helton et al.
patent: 3989112 (1976-11-01), Cole et al.
patent: 4016936 (1977-04-01), Easterling et al.
Cole Carroll R.
Dezelan Joseph E.
Easterling Gene B.
Caterpillar Tractor Co.
Stouffer Richard T.
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