Drive for a steam servo valve

Details Drive for a steam servo valve Drive for a steam servo valve

1991-03-26

1992-03-17

Look, Edward K.

Motors: expansible chamber type

Working member position feedback to motive fluid control

Electrical input and feedback signal means

91365, 91403, 91454, 91461, F15B 1300, F15B 1100

Patent

active

050958046

ABSTRACT:
A drive for a steam servo valve (2), including a control valve arrangement for regulating the actuating pressure of a servo drive (1), whereby the drive can always be actuated reliably and quickly even with comparatively high oil pressure. This is achieved by the control valve arrangement having at least two regulatable control valves (17, 21) which are pressure-actuated via at least one pilot regulating valve (proportional pressure valve 29, 34).

REFERENCES:
patent: 3620129 (1971-11-01), Fruehauf
patent: 4165613 (1979-08-01), Bernhoft et al.
patent: 4275691 (1981-06-01), Wolff et al.
patent: 4276810 (1981-07-01), Zeuner et al.
patent: 4401009 (1983-08-01), Zeuner et al.
patent: 4531449 (1985-07-01), Reith
patent: 4727791 (1988-03-01), Satoh
patent: 4741247 (1988-05-01), Glomeau et al.
patent: 4870892 (1989-10-01), Thomsen et al.

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