Valve of a piston pump having a two-part closing body

Patent metadata

Field	Value
Publication number	US-11007990-B2
Application number	US-201514747449-A
Country	US
Kind code	B2
Filing date	Jun 23, 2015
Priority date	Jun 27, 2014
Publication date	May 18, 2021
Grant date	May 18, 2021

Abstract

A valve of a piston pump for a vehicle brake system having a closing body which is resiliently preloaded against a sealing seat. The closing body is formed in two parts with a damping piston and a closing element inserted therein. The damping piston is axially displaceably guided in a cylindrical piston guide. At least one flow channel is provided between the damping piston and the piston guide. The at least one flow channel is configured such that fluid can flow around the damping piston in the longitudinal direction thereof through the at least one flow channel.

First claim

What is claimed is:

1. A valve of a piston pump for a vehicle brake system, the valve comprising:
a cylinder having a circular outflow opening at a first end thereof, the outflow opening being surrounded by a sealing seat;
a pump cover which encloses the first end, the pump cover forming a cylindrical piston guide;
a closing body resiliently preloaded against the sealing seat, the closing body formed in two parts with a damping piston and a closing element inserted in the damping piston,
wherein the damping piston is axially displaceably guided in the cylindrical piston guide,
wherein at least one flow channel is provided between an outer circumferential surface of the damping piston and the piston guide, and
wherein the at least one flow channel is configured to enable fluid to flow around the damping piston in a longitudinal direction of the damping piston through the at least one flow channel.

2. The valve according to claim 1 , wherein the at least one flow channel is a cutout in the damping piston.

3. The valve according to claim 2 , wherein the cutout is a radially directed slot in the damping piston.

4. The valve according to claim 2 , wherein the cutout includes four cutouts provided in a uniformly distributed manner over a circumference of the damping piston.

5. The valve according to claim 1 , wherein the at least one flow channel is a cutout in the piston guide.

6. The valve according to claim 5 , wherein the cutout is a radially directed groove in the piston guide.

7. The valve according to claim 5 , wherein the cutout includes four cutouts provided in a uniformly distributed manner over a circumference of the piston guide.

8. The valve according to claim 1 , wherein the valve is configured for use on a piston pump of a hydraulic vehicle brake system.

Assignees

• Bosch Gmbh Robert

Inventors

• Hennig Oliver
• Schellnegger Patrick
• Gaertner Oliver

Classifications

• F04B53/125

  Reciprocating valves · CPC title

• B60T8/341

  Systems characterised by their valves (B60T8/36, B60T8/38 take precedence) · CPC title

• F04B53/10

  Valves; Arrangement of valves · CPC title

• Y10T137/7929

  Spring coaxial with valve · CPC title

• B60T8/4031 Primary

  Pump units characterised by their construction or mounting (pump units in combination with valve blocks B60T8/36) · CPC title