# US 2020/0400045 A1 · Valve for Variable Throttling of a Hydraulic Flow with a Fatigue-Resistant Mechanical Means for Reducing Possible Valve Oscillations

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- Number: US 2020/0400045 A1
- Document ID: US20200400045A1
- Status: Published application
- Kind: A1
- Application number: 16/888,837
- Filed: 2020-05-31
- Published: 2020-12-24
- Earliest claimed: 2019-06-19
- Assignees: Robert Bosch GmbH
- Applicants: Robert Bosch GmbH
- Inventors: Andreas Lechler; Andrej Gardt; Christoph Eisele; Edgar Kurz; Felix Schorn; Joern Kreutzer; Marcus Biehler; Michael Kloss; Patrick Schellnegger; Wolf Stahr
- Web page: https://patentgrep.com/patent/US20200400045A1

## CPC

- F01L 9/10: by fluid means, e.g. hydraulic
- F16K 15/026: {the valve member being a movable body around which the medium flows when the valve is open}
- B60T 17/04: Arrangements of piping, valves in the piping, e.g. cut-off valves, couplings or air hoses (traction couplings involving joints for supply lines, electric circuits, or the like B60D1/62; couplings peculiar to railway vehicles for, or combined with, couplings or connectors for fluid conduits or electric cables B61G5/06; pipes, cut-off valves, couplings, air hoses per se F16C, F16K, F16L)
- F16K 15/02: with guided rigid valve members
- F16K 15/063: {the valve being loaded by a spring}
- F16K 17/0433: {with vibration preventing means}
- F16K 27/0209: {Check valves or pivoted valves}
- F01L: CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F16K: VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING {(devices for emptying and evacuating the excess liquid in valves or conduits F16L55/07)}
- B60T: VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL (electrodynamic brake systems for vehicle, in general B60L; brakes per se, i.e. devices where braking effect occurs, including ultimate brake actuators, F16D); ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES

## Abstract

A valve for variable throttling of a hydraulic flow includes a tappet and a guide element in which the tappet is guided for movement in a stroke direction. The valve also includes at least one fatigue-resistant, mechanical member that locally reduces a radial play of the tappet so as to reduce possible valve oscillations.

## Claims

### Claim 1

A valve for variable throttling of a hydraulic flow, comprising:
a tappet;
a guide element in which the tappet is guided for movement in a stroke direction; and
at least one fatigue-resistant, mechanical member that locally reduces a radial play of the tappet so as to reduce possible valve oscillations.

### Claim 2 (depends on 1)

The valve according to claim 1, wherein the at least one mechanical member applies a transverse force to the tappet during a stroke movement.

### Claim 3 (depends on 1)

The valve according to claim 1, wherein the at least one mechanical member is metal.

### Claim 4 (depends on 1)

The valve according to claim 1, wherein the at least one mechanical member is a spring.

### Claim 5 (depends on 4)

The valve according to claim 4, wherein the spring is a flexible spring.

### Claim 6 (depends on 5)

The valve according to claim 5, wherein the flexible spring is orientated in the stroke direction or transversely to the stroke direction.

### Claim 7 (depends on 1)

The valve according to claim 1, wherein the at least one mechanical member is at least two mechanical members that are arranged so as to be distributed along a periphery around the tappet.

### Claim 8 (depends on 1)

The valve according to claim 1, wherein the at least one mechanical member is integrated at least in the guide element or is formed integrally therewith.

### Claim 9 (depends on 1)

The valve according to claim 1, wherein the guide element is a sleeve.

### Claim 10 (depends on 1)

The valve according to claim 1, wherein the guide element is a resilient sleeve on which a pretensioning element is supported, and wherein the pretensioning element pretensions the tappet in the stroke direction.