Infinitesimally variable hydraulic valve

Details Infinitesimally variable hydraulic valve Infinitesimally variable hydraulic valve

1984-06-25

1987-06-30

Look, Edward K.

Motors: expansible chamber type

With motive fluid valve

Plural actuators for single valve means

91461, 91462, 13762517, 13762566, 13762568, F15B 1108

Patent

active

046761411

ABSTRACT:
A hydraulic valve provides infinitesimally variable flow in both directions through the valve including a position of no flow. The valve can be operated either hydraulically or mechanically. It includes a housing with a bore therethrough, a sleeve slidably mounted inside the bore, and endplates enclosing the ends of the bore. Ports allow controlled passage of hydraulic fluid through the housing, the sleeve, and extensions from the endplates so that fluid from a hydraulic pump enters ports in the housing, flows controllably through the valve, out one of the endplates, through a use apparatus, back into the remaining endplate, and to a sump.

REFERENCES:
patent: 148692 (1874-03-01), Hain et al.
patent: 807865 (1905-12-01), Prescott
patent: 3216454 (1965-11-01), Richter et al.
patent: 3318332 (1967-05-01), Lansky et al.
patent: 3941223 (1976-03-01), Murakami
patent: 3949646 (1976-04-01), Taylor
patent: 4199007 (1980-04-01), Holmes

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