Fluid handling – Systems – Supply and exhaust
Patent
1990-01-24
1991-06-11
Michalsky, Gerald A.
Fluid handling
Systems
Supply and exhaust
91436, 13759613, 13762568, F15B 1304
Patent
active
050224344
ABSTRACT:
A directional control valve includes a casing having a bore therein, a pair of inlet/outlet passages connected to a pair of inlet/outlet apertures, a U-shaped supply passage disposed between the inlet/outlet passages, a pair of reservoir passages between which the inlet/outlet passages are disposed and a plunger which has a plurality of land portions and is reciprocably movable in the bore into which the inlet/outlet passages and the U-shaped passage and the reservoir passages open, such that a fluid passed through the inlet/outlet apertures and the inlet/outlet passages and the U-shaped supply passage and the reservoir passages is controlled in response to a reciprocating motion of the plunger. A sub-reservoir is provided, through which one of the inlet/outlet passages is communicated with one of the reservoir passages. The sub-reservoir has an inlet and an outlet which open into the bore so that both of the inlet and the outlet of the sub-reservoir are directed towards only one of the land portions or towards two of the land portions which are adjacent to each other.
REFERENCES:
patent: 2448557 (1949-09-01), Stephens
patent: 2651324 (1953-09-01), Hodgson et al.
patent: 2916050 (1959-12-01), Ruhl
patent: 2949097 (1960-08-01), Vander Kaay
patent: 2980136 (1961-04-01), Krehbiel
Michalsky Gerald A.
Toshiba Machine Co. Ltd.
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