Servo valve
AssigneeMercedes-Benz AG
InventorsGerd Speidel, Ernst-Heinrich Fasse
Life of this patent
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Abstract
In a servo valve for hydraulic power steerings of motor vehicles which consists of a rotary spool valve having a rotary spool rotatably disposed in a control sleeve, a front end of the control sleeve and a flange structure on the rotary spool have spaced oppositely arranged faces forming a gap therebetween in which a C-shaped spring is disposed which extends around the rotary spool and has free opposite ends in engagement with pins projecting axially toward one another from the opposite faces of the control sleeve and the flange structure when both are in a center position relative to one another so as to bias the control sleeve and the flange structure into such center position with a predetermined spring force.
Claims8
A servo valve especially for hydraulic power steerings of motor vehicles, consisting of a rotary spool valve having a rotary spool received in a control sleeve so as to be rotatable relative to the control sleeve and spring means biasing said rotary spool and said control sleeve into a center position relative to one another, said control sleeve having a front end and said rotary spool having a face structure disposed opposite the front end of said control sleeve and in spaced relationship therefrom so as to form a gap therebetween, said control sleeve front end and said face structure having means axially projecting therefrom toward one another at a predetermined distance from the axis of said control sleeve and said rotary spool and having a combined length somewhat less than the width of said gap, and a C-shaped spring disposed in said gap around said rotary spool and having opposite free ends engaging said axially projecting means for biasing said rotary spool and said control sleeve into a center position in which said axially projecting means are in axial alignment with each other.
Dependencies are inferred from the claim text.