Damping valve for a vibration damper

Patent metadata

Field	Value
Publication number	US-11434970-B2
Application number	US-201816628978-A
Country	US
Kind code	B2
Filing date	Jun 21, 2018
Priority date	Jul 7, 2017
Publication date	Sep 6, 2022
Grant date	Sep 6, 2022

Abstract

A damping valve having a damping valve body with at least one flow channel for damping medium. A valve rod is arranged in the flow channel. The valve rod cooperates with a valve disk and a valve seat surface. The valve rod carries a further valve disk that cooperates with a second valve seat surface. The first valve disk together with the first valve seat surface forms a first partial valve having a first permanently open pilot orifice cross section, and the second valve disk together with the second valve seat surface forms a second partial valve having a second pilot orifice cross section, and a shuttle valve is formed which opens one partial valve and closes the other partial valve depending on the flow direction.

First claim

The invention claimed is:

1. A damping valve comprising:
a damping valve body with a flow channel having a first and second throughflow direction;
a first valve disk configured such that the first valve disk restricts a damping medium flow;
a check valve arrangement with a check valve; and
a second valve disk configured such that the second valve disk restricts the damping medium flow,
wherein the valve disks each have an annular flow path that restricts the dampening medium flow, and
wherein the check valve switches between the two throughflow directions of the flow channel.

2. The damping valve according to claim 1 , wherein the check valve arrangement has a divisible housing having a check valve body.

3. The damping valve according to claim 2 , wherein the divisible housing has a guide shoulder for at least one valve disk.

4. The damping valve according to claim 2 , wherein the divisible housing is centered in the flow channel via the valve disks.

5. The damping valve according to claim 1 , wherein a supporting disk is associated with at least one of the valve disks.

6. The damping valve according to claim 5 , wherein the supporting disk is centered at a divisible housing.

7. The damping valve according to claim 5 , wherein the supporting disk has a larger outer diameter than an inner diameter of a valve seat surface.

8. The damping valve according to claim 1 , wherein the flow channel has a radial shoulder configured as a valve seat surface for the first valve disk.

9. The damping valve according to claim 1 , wherein the check valve arrangement is fixed in the at least one flow channel by a screw ring.

Assignees

• Zahnradfabrik Friedrichshafen

Inventors

• Beck Holger
• Schmitz Klaus
• Kapell Sven

Classifications

• F16F9/46

  allowing control from a distance {, i.e. location of means for control input being remote from site of valves, e.g. on damper external wall (attachment of valve units to cylinders F16F9/325)} · CPC title

• F16K47/0111

  the valve members comprising a plunger sliding within a fixed dashpot · CPC title

• F16F9/3488

  characterised by features intended to affect valve bias or pre-stress · CPC title

• Y10T137/7837

  Direct response valves [i.e., check valve type] · CPC title

• F16F9/3405

  Throttling passages in or on piston body, e.g. slots (F16F9/344, F16F9/3481 take precedence) · CPC title