High bandwidth rotary servo valves

Details High bandwidth rotary servo valves High bandwidth rotary servo valves

2008-01-29

2008-01-29

Fox, John (Department: 3753)

Fluid handling

Systems

Multi-way valve unit

C137S625220, C137S625240, C251S283000

Reexamination Certificate

active

07322375

ABSTRACT:
A valve includes a rotating, substantially pressure-balanced spool that selectively aligns openings within the spool with openings within a sleeve to selectively connect ports of a manifold for gas or liquid routing. A valve may also include a stem, a needle coupled to the stem. a seat configured to receive the needle, a reservoir, an outlet coupled to the reservoir, and a servo motor coupled to the stem. The servo motor rotates the stem to raise or lower the needle relative to the seat to variably restrict or allow matter flowing from the reservoir to the outlet.

REFERENCES:
patent: 2047615 (1936-07-01), Chadborn
patent: 2234322 (1941-03-01), Sicard
patent: 2547929 (1951-04-01), Dawson
patent: 3015344 (1962-01-01), Hausmann et al.
patent: 3199539 (1965-08-01), Leathem
patent: 3442291 (1969-05-01), Carls
patent: 3454049 (1969-07-01), Hoos
patent: 4177834 (1979-12-01), Bonney
patent: 4800924 (1989-01-01), Johnson
patent: 5467800 (1995-11-01), Sallas
patent: 5522416 (1996-06-01), Farrell et al.
patent: 5954093 (1999-09-01), Leonard

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