Electrohydraulic servovalve having removably attached feedback e

Details Electrohydraulic servovalve having removably attached feedback e Electrohydraulic servovalve having removably attached feedback e

1978-10-23

1980-05-06

Maslousky, Paul E.

Motors: expansible chamber type

Jet control type

91365, 91386, 91387, 13762561, 13762564, 403 4, 403 24, F15B 1316

Patent

active

042011140

ABSTRACT:
An electrohydraulic servovalve including a second stage piston slidably mounted within a housing and movable responsive to application of pressure signals thereacross to control the flow of fluid under pressure from a source to a load in response to electrical input signals applied to the servovalve. The electrical signals are applied to a torque motor which has a driven member affixed thereto which generates the pressure signals applied to the spool. A mechanical feedback member is connected between the driven member and the spool. The mechanical feedback member is part of an assembly which is removably attached to the driven member. The removable attachment includes a tang extending radially from the driven member which receives a holder to which the feedback member is permanently affixed. The holder includes opposed flanges one of which receives the tang through an indexing opening provided therein. The tang resides in a space defined between the flanges and further the holder includes means for clamping the holder to the tang to position the feedback member in its normal operational position.

REFERENCES:
patent: 2461851 (1949-02-01), Stoples
patent: 3218936 (1965-11-01), Anderson et al.
patent: 3401603 (1968-09-01), Coakley et al.
patent: 3584649 (1971-06-01), Cobb
patent: 3750532 (1973-08-01), Kubilos
patent: 3915427 (1975-10-01), Swogger

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