Piston pump having a holder

Patent metadata

Field	Value
Publication number	US-9631617-B2
Application number	US-201113994753-A
Country	US
Kind code	B2
Filing date	Oct 25, 2011
Priority date	Dec 17, 2010
Publication date	Apr 25, 2017
Grant date	Apr 25, 2017

Abstract

A piston pump, in particular for a hydraulic assembly of an electronically controllable vehicle brake system, includes a cylinder element that has a pressure chamber with an outlet formed on the inside. The piston pump further includes an outlet-restricting element held on the outside of the cylinder element on a component by a first holder.

First claim

The invention claimed is:

1. A piston pump, comprising:
a cylinder element forming a delivery chamber with an outlet on an inside of the cylinder element; and
an outlet valve outside the cylinder element and hydraulically downstream of the delivery chamber, the outlet valve including:
a component defining a plurality of openings and having a first mount region; and
an outlet-restricting element positioned over the plurality of openings and mounted at the first mount region of the component in such a way that fluid passing through the plurality of openings bends the outlet-restricting element such that a radially outer portion of the outlet-restricting element deflects away from the plurality of openings in an axial direction by a greater axial distance than a radially inner portion of the outlet-restricting element,

wherein the radially inner portion of the outlet-restricting element is fixed axially such that the radially inner portion does not move when the radially outer portion deflects.

2. The piston pump as claimed in claim 1 , wherein the component bears against the cylinder element.

3. The piston pump as claimed in claim 1 , wherein the component is at least partially of plate-shaped design.

4. The piston pump as claimed in claim 1 , wherein:
the outlet valve further comprises a valve spring, and
the component comprises a second mount region on which the valve spring is mounted.

5. The piston pump as claimed in claim 4 , wherein the valve spring is embodied as a leaf spring or spiral spring.

6. The piston pump as claimed in claim 1 , wherein the openings of the plurality of openings are spaced around a circumference of the component.

7. The piston pump as claimed in claim 6 , wherein the openings are spaced around a circumference of the first mount region.

8. The piston pump as claimed in claim 1 , wherein the component is fixed in position by a closure element, which defines a space for a damper.

9. The piston pump as claimed in claim 1 , wherein the component is formed as an injection-molded part, a turned metal part, or as a cold-formed part.

10. The piston pump as claimed in claim 1 , wherein the piston pump is for a hydraulic assembly of an electronically controlled vehicle brake system.

11. The piston pump as claimed in claim 1 , wherein the first mount region is on a first side of the component which faces toward the cylinder element, and the outlet-restricting element is interposed between the first side of the component and the cylinder element.

12. A piston pump, comprising:
a cylinder element forming a delivery chamber with an outlet on an inside of the cylinder element; and
an outlet valve outside the cylinder element and hydraulically downstream of the delivery chamber, the outlet valve including:
a component defining a plurality of openings and having a first mount region; and
an outlet-restricting element positioned over the plurality of openings and mounted at the first mount region of the component in such a way that fluid passing through the plurality of openings deflects a radially outer portion of the outlet-restricting element away from the plurality of openings in an axial direction,

wherein the first mount region of the component comprises a step configured to pre-tension the outlet-restricting element.

13. A piston pump, comprising:
a cylinder element forming a delivery chamber with an outlet on an inside of the cylinder element; and
an outlet valve outside the cylinder element; and hydraulically downstream of the delivery chamber, the outlet valve including:
a component defining a plurality of openings and having a first mount region on a first side of the component which faces the cylinder element; and
an outlet-restricting element interposed between the first side of the component and the cylinder element, positioned over the plurality of openings, and mounted at the first mount region of the component in such a way that fluid passing through the plurality of openings deflects a radially outer portion of the outlet-restricting element away from the plurality of openings in an axial direction,

wherein a portion of the first side of the component bears against the cylinder element.

14. The piston pump as claimed in claim 13 , wherein:
the outlet valve further comprises a valve spring, and
the component comprises a second mount region on the first side of the component, and the valve spring is mounted on the second mount region.

15. The piston pump as claimed in claim 13 , wherein the component is fixed in position by a closure element, which defines a space for a damper, the closure element bearing against a second side of the component that is opposite the first side.

Assignees

• Gaertner Oliver
• Jahn Heiko
• Zimmermann Marc
• Gosse Daniel
• Bosch Gmbh Robert

Inventors

• Gaertner Oliver
• Jahn Heiko
• Zimmermann Marc
• Gosse Daniel

Classifications

• F04B53/162

  Adaptations of cylinders · CPC title

• F04B39/125

  Cylinder heads · CPC title

• F04B53/007

  Cylinder heads · CPC title

• F04B11/0091

  using a special shape of fluid pass, e.g. throttles, ducts · CPC title

• B60T8/4031 Primary

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