Negative rate compensated hydraulic servo system

Details Negative rate compensated hydraulic servo system Negative rate compensated hydraulic servo system

1979-08-23

1982-11-23

Maslousky, Paul E.

Motors: expansible chamber type

Constantly applied motive fluid with controlled venting

91387, 91417R, 91416, 137 82, F15B 1316, F15B 1517

Patent

active

043599290

ABSTRACT:
A flapper valve having a negative rate characteristic is variably opened by an external force and controls fluid pressure to a piston which moves, in response to this pressure, in order to return the valve to a null position. A positive rate flapper valve applies force to the negative rate flapper valve and balances the fluid pressure in the negative rate flapper valve, thus providing high sensitivity negative flapper valve operation in the null position region and a negative rate in the region to overcome piston friction, without instability.

REFERENCES:
patent: 2911991 (1959-11-01), Pearl
patent: 2920639 (1960-01-01), Higgins, Jr. et al.
patent: 2995116 (1961-08-01), Dobbins
patent: 3139922 (1964-07-01), Peczkowski
patent: 3171330 (1965-03-01), McCombs, Jr.
patent: 3313212 (1967-04-01), Baker et al.
patent: 3393606 (1968-07-01), Magnoni et al.
patent: 3491652 (1970-01-01), Riggs

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