Hydraulic control means for a sweeping roller held by two cylind

Details Hydraulic control means for a sweeping roller held by two cylind Hydraulic control means for a sweeping roller held by two cylind

1987-07-31

1988-11-22

Garrett, Robert E.

Motors: expansible chamber type

Plural relatively movable or rigidly interconnected working...

Condition responsive means for modifying working member...

91518, 91519, 91532, 15 82, F15B 1100, F15B 1300

Patent

active

047857153

ABSTRACT:
The sweeping roller of a sweeping machine is held on the ground in sweeping operation by two hydraulic cylinders in such a manner that the degree of wear is small. For this purpose in each cylinder a static and different holding pressure must be set. The higher pressure is set at a pressure-limiting valve and the lower pressure at the series circuit parallel thereto of a nozzle with an adjustable throttle.

REFERENCES:
patent: 3037226 (1962-06-01), Schmidt et al.
patent: 3616477 (1971-11-01), Larson
patent: 3760688 (1973-09-01), Dummer
patent: 4328603 (1982-05-01), Dickson et al.
patent: 4349305 (1982-09-01), Wynn et al.
patent: 4615260 (1986-10-01), Takagi et al.

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