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US 2026/0218773 A1Published application
Hydraulic damper
AssigneeBeijingwest Industries Co., Ltd.
InventorsDominik KASPRZYK, Karol KOZUBEK
Life of this patent
Estimating the term…
Abstract
A damper assembly with a hydraulic compression stop (HCS) includes a tube defining an interior chamber. The damper assembly also includes a piston assembly slidably disposed in the tube. The piston assembly includes an HCS piston and a safety valve assembly disposed on top of a base valve. The safety valve assembly includes one or more deflective discs configured to deflect in response to a force applied to the piston rod exceeding a predetermined threshold, the deflection of the discs enables a second flow of working fluid from the HCS to the base valve assembly thereby reducing the forces applied to the HCS.
Claims20
A hydraulic damper comprising:
- a main tube filled with a working fluid;
- an external tube extending about the main tube and defining a compensation chamber;
- a main piston assembly slidably disposed in the main tube and dividing the main tube into a rebound chamber and a compression chamber;
- a base valve assembly located at an end of the compression chamber to control a flow of working fluid passing between the compression chamber and the compensation chamber;
- and
- a hydraulic compression stop assembly disposed in the compression chamber and including:
- a safety valve assembly including a plurality of deflective discs and an adapter member the safety valve assembly configured to change between a disengaged state and an engaged state,
- a sleeve fixed on the adapter member and configured to allow the flow of working fluid between the sleeve and the main tube through the base valve assembly, the sleeve defining an inner chamber, and
- an additional piston assembly displaceable along with the main piston assembly and apt to be introduced inside the inner chamber of the sleeve at an end of a hydraulic damper compression stroke to generate an additional damping force, wherein the additional damping force is associated with a pressure applied to the safety valve assembly,
- wherein in response to the associated pressure being below a predetermined threshold, the safety valve assembly is in the disengaged state, in which the plurality of deflective discs are not deflected to enable a first flow of working fluid from the inner chamber to the compression chamber, and in response to the associated pressure rising above the predetermined threshold, the safety valve assembly is in the engaged state, in which the plurality of deflective discs are deflected to enable a second flow of working fluid from the safety valve assembly to the base valve assembly.
7 more elements
A hydraulic damper comprising:
- a main tube filled with a working fluid;
- an external tube extending about the main tube and defining a compensation chamber;
- a main piston assembly including a main piston rod and slidably disposed inside the main tube and dividing the main tube into a rebound chamber and a compression chamber;
- a base valve assembly located at an end of the compression chamber to control a flow of working fluid passing between the compression chamber and the compensation chamber;
- and
- a hydraulic compression stop assembly disposed in the compression chamber and including:
- a safety valve assembly configured to change between a disengaged state and an engaged state,
- a sleeve fixed on safety valve assembly and configured to allow the flow of fluid between the sleeve and the main tube through the base valve assembly, the sleeve defining an inner chamber, and
- an additional piston assembly including an additional piston rod, a piston ring, and a fastener, the fastener fixing the piston ring to the additional piston rod, wherein the additional piston assembly is displaceable along with the main piston assembly and apt to be introduced inside the inner chamber of the sleeve at an end of a hydraulic damper compression stroke to generate an additional damping force, wherein the additional damping force is associated with a pressure applied to the safety valve assembly,
- wherein in response to the associated pressure being below a predetermined threshold, the safety valve assembly is in the disengaged state to enable a first flow of working fluid between the additional piston assembly and the inner chamber, and in response to the associated pressure rising above the predetermined threshold, the safety valve is in the engaged state to enable a second flow of working fluid to flow from the safety valve assembly to the base valve assembly.
7 more elements
A hydraulic damper comprising:
- a main tube filled with a working fluid;
- an external tube extending about the main tube and defining a compensation chamber;
- a main piston assembly including a main piston rod and slidably disposed inside the main tube and dividing the main tube into a rebound chamber and a compression chamber;
- a base valve assembly located at an end of the compression chamber to control a flow of working fluid passing between the compression chamber and the compensation chamber;
- and
- a hydraulic compression stop assembly disposed in the compression chamber and including:
- a safety valve assembly configured to change between a disengaged state and an engaged state the safety valve assembly include a plurality of deflective discs configured to deflect to change a state of the safety valve assembly from the disengaged state to the engage state,
- a sleeve fixed on safety valve assembly and configured to allow the flow of fluid between the sleeve and the main tube through the base valve assembly, the sleeve defining an inner chamber, and
- an additional piston assembly including an additional piston rod, a piston ring, and a fastener, the fastener fixing the piston ring to the additional piston rod, wherein the additional piston assembly is displaceable along with the main piston assembly and apt to be introduced inside the inner chamber of the sleeve at an end of a hydraulic damper compression stroke to generate additional damping force, wherein a pressure applied to the safety valve assembly is based on the additional damping force,
- wherein in response to the pressure being below a predetermined threshold, the safety valve assembly is in the disengaged state to enable a first flow of working fluid between the additional piston assembly and the inner chamber, and in response to the pressure rising above the predetermined threshold, the safety valve assembly is in an engaged state to enable a second flow of working fluid to flow from the safety valve assembly to the base valve assembly.
7 more elements
Dependencies are inferred from the claim text.