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US 10,760,637 B2Granted
Adjustable damping valve device
AssigneeZF Friedrichshafen AG
InventorsThomas Manger, Lukas Ruhmann, Stefan Schmitt
Life of this patent
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Abstract
An adjustable damping valve device for a vibration damper, includes a main stage valve which is controlled by a pre-stage valve with a pre-stage valve body, which pre-stage valve can be actuated by an electromagnetic actuator, wherein an emergency operation valve controls the main stage valve during emergency operation, wherein an emergency operation armature is preloaded on the pre-stage valve body of the pre-stage valve by an emergency operation spring so that the pre-stage valve forms the emergency operation valve.
Claims12
An adjustable damping valve device for a vibration damper comprising:
- a main stage valve having an axially movable main stage valve body and an axially extending channel;
- a pre-stage valve including an axially moveable pre-stage valve body having a first surface facing said axially extending channel in said main stage valve body and a cover surface opposite said first surface and facing away from said axially extending channel and constructed to control said main stage valve;
- an electromagnetic actuator constructed to actuate said pre-stage valve;
- an emergency operation valve constructed to control said main stage valve during an outage of power supplied to the electromagnetic actuator;
- and
- an emergency operation armature preloaded by an emergency operation spring on said axially moveable pre-stage valve body of said pre-stage valve so that, during the outage of power supply to the electromagnetic actuator, the emergency operation armature is in constant direct contact with said cover surface of said axially moveable pre-stage valve body and so that said pre-stage valve forms said emergency operation value.
3 more elements
Dependencies are inferred from the claim text.