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US 10,946,851 B2Granted
Pump arrangement for a hydraulic unit having a pump piston
AssigneeRobert Bosch GmbH
InventorOliver Gaertner
Life of this patent
Estimating the term…
Abstract
In a pump arrangement for a hydraulic unit of a vehicle brake system having a pump housing and a pump piston which is guided so as to be displaceable axially back and forth in the pump housing, a damping element is provided radially between the pump piston and the pump housing. The damping element damps vibrations of the pump piston which occur during an operation of the pump arrangement.
Claims12
A pump arrangement for a hydraulic unit of a vehicle brake system, comprising:
- a pump housing;
- a pump piston guided so as to be displaceable axially in the pump housing;
- and
- a damping element arranged radially between the pump piston and the pump housing, the damping element configured to damp vibrations of the pump piston which occur during operation of the pump arrangement,
- wherein the damping element comprises a piston-bearing surface that bears against a piston outer surface of the pump piston, and the piston-bearing surface is configured with a friction-reducing coating.
2 more elements
A pump arrangement for a hydraulic unit of a vehicle brake system, comprising:
- a pump housing;
- a pump piston guided so as to be displaceable axially in the pump housing;
- and
- a damping element arranged radially between the pump piston and the pump housing, the damping element configured to damp vibrations of the pump piston which occur during operation of the pump arrangement,
- wherein the damping element comprises:
- a piston-bearing surface that bears against a piston outer surface of the pump piston;
- and
- a supporting surface facing away from the piston-bearing surface and supported on an inner surface in the pump housing,
- wherein the damping element is of a first material and a second material, the piston-bearing surface formed of the first material and the supporting surface formed of the second material, and
- wherein the first material has a lower coefficient of friction than the second material.
7 more elements
Dependencies are inferred from the claim text.