Check valve for a hydraulic power-assisted steering system
AssigneeThyssenkrupp Presta AG
InventorsPeter Hölzle, Roger Kollmeier, Niels Worringen
Life of this patent
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Abstract
The invention relates to a check valve for a hydraulic power-assisted steering system, with a valve housing, into which a movable valve member is inserted, wherein the valve member interacts with sealing effect with a valve seat, and has lateral guide elements for guiding the valve member in the valve housing, wherein the movable valve member is a shaped metal part with uniform wall thickness and at least three guide elements having a constant width in the circumferential direction.
Claims8
A check valve for a hydraulic power-assisted steering system, with a valve housing, into which a movable valve member is inserted, wherein:
- the valve member interacts with sealing effect with a valve seat and has lateral guide elements for guiding the valve member in the valve housing,
- a base is provided, which carries outflow openings located downstream of the valve member and a trunnion arranged centrally in the direction of flow beneath the movable valve member, which trunnion delimits the stroke of the valve member, and
- a helical spring is arranged centrally and coaxially to an axis of symmetry of the check valve, which helical spring pre-tensions the check valve into the closed position, wherein
- the outflow openings in the base are open only in the axial direction of the valve, and that the sections of the base forming the outflow openings are arranged outside the contact surface of the helical spring.
Dependencies are inferred from the claim text.