Motors: expansible chamber type – Plural relatively movable or rigidly interconnected working... – Separate valve means actuatable by a common nonmanual...
Patent
1997-01-30
1998-02-24
Lopez, F. Daniel
Motors: expansible chamber type
Plural relatively movable or rigidly interconnected working...
Separate valve means actuatable by a common nonmanual...
91530, 172439, 180900, F15B 1116
Patent
active
057202141
ABSTRACT:
In a working vehicle including a first control valve assembly (15) for controlling the operation of a hydraulic lift cylinder (14), a cylinder case (13) of the lift cylinder includes, at one of its side surfaces, a vertical seating surface (52) on which a second control valve assembly (20) for controlling the operation of plural another hydraulic actuators (18, 19) is mounted. The second valve assembly includes plural control valve spools (31, 32) which extend in the valve case axially of the vehicle at levels different from one another. Of ports in the valve case, fluid inlet port (26), fluid outlet port (27) for conducting fluid towards the first valve assembly which is mounted on the cylinder case preferably at a lower surface thereof, and fluid drain port (30) open at the seating surface for connecting these ports directly to corresponding fluid passages in the cylinder case, while fluid output ports (28A, 28B, 29A, 29B) for conducting fluid towards the actuators open at an outer side surface of the valve case.
REFERENCES:
patent: 2638045 (1953-05-01), Heitshu
patent: 4183287 (1980-01-01), Hamada et al.
patent: 4643442 (1987-02-01), Ohashi et al.
patent: 5479845 (1996-01-01), Kawamura et al.
Operator's Manual for International 1566 and 1568 Tractors, pp. 36 and 39-41.
Amano Hideki
Kawamura Masahisa
Kanzaki Kokyukoki Mfg. Co. Ltd.
Lopez F. Daniel
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