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US 10,408,363 B2Granted
Valve having a control slide guided in a valve housing so as to be longitudinally movable
AssigneeHydac System GmbH
InventorsSascha Alexander Biwersi, Marcus Hettiger, Christoph Stoenner
Life of this patent
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Abstract
A valve has a control slide (4) guided in a valve housing (6) so as to be longitudinally movable. The control slide selectively connects a plurality of fluid connection points (P, T, A, B) in the valve housing (6) to each other in a fluid-conducting manner or disconnects the fluid connection points from each other, and can be electrically controlled by a stepper motor (2). The control slide (4) can be actuated by an emergency device (34, 52) in the event of a malfunction or failure.
Claims10
A valve, comprising;
- a valve housing having a plurality of connection points therein and having a longitudinal axis;
- a control slide guided for axial movement in said valve housing along said longitudinal axis and selectively connecting and disconnecting said connection points in fluid communication;
- an electrical step motor having a toothed rack coupled to a first axial end of said control slide and controlling axial movement of said control slide in said valve housing, said toothed rack being in meshed engagement with a pinion of said step motor;
- an emergency device coupled to and activating said control slide to move axially along longitudinal axis in said valve housing upon a malfunction or a failure, said emergency device including a manually actuatable control rod fixedly connected to a second axial end of said control slide opposite said first axial end;
- and an emergency button fixedly connected on a free axial end of said control rod remote from said control slide.
2 more elements
Dependencies are inferred from the claim text.