Overpressure valve in the form of a check valve

Patent metadata

Field	Value
Publication number	US-9556963-B2
Application number	US-201314427138-A
Country	US
Kind code	B2
Filing date	May 23, 2013
Priority date	Sep 11, 2012
Publication date	Jan 31, 2017
Grant date	Jan 31, 2017

Abstract

The invention relates to an overpressure valve ( 1 ) which is in the form of a one-way valve or a check valve and which includes a pot-shaped housing ( 2 ) with a base ( 3 ) and central opening ( 4 ) and which also has a valve seat ( 6 ) which interacts with a spring-loaded closing body ( 7 ). A guide sleeve ( 9 ) is inserted with a force fit or form fit into the housing ( 2 ) for the purpose of receiving a compression spring ( 8 ) which exerts a load on the closing body ( 7 ), which guide sleeve simultaneously ensures a construction of the overpressure valve ( 1 ) which is secured against falling apart.

First claim

The invention claimed is:

1. An overpressure valve in the form of a one-way valve or a check valve comprising a pot-shaped housing with a base and a central opening and a valve seat which interacts with a spring-loaded closing body, a guide sleeve inserted flush in the housing with a force fit or form fit such that a guide sleeve axial end face and a housing axial end face are aligned, the guide sleeve receives a compression spring which exerts a load on the closing body, said guide sleeve secures the overpressure valve together.

2. The overpressure valve according to claim 1 , wherein the overpressure valve is a preassembled unit adapted for insertion into a tensioning device of a traction mechanism drive.

3. The overpressure valve according to claim 1 , wherein the guide sleeve is made from a plastic, and includes, on one end side, a receptacle or stroke limiting device for the closing body and, on an opposite side, a discharge hole.

4. The overpressure valve according to claim 1 , wherein the compression spring is supported on a sleeve base of the guide sleeve, and a wall height (H) of the sleeve base of the guide sleeve determines a pretensioning force of the compression spring.

5. The overpressure valve according to claim 1 , wherein the base of the housing is dome-shaped and forms, in an area of a step, the valve seat for the closing body.

6. The overpressure valve according to claim 1 , wherein a ball is provided as the closing body, and said ball is guided in a dome-shaped stroke limiting device of the guide sleeve or in a stepped section of the base.

7. A tensioner assembly including the overpressure valve according to claim 1 , further comprising a tensioning device with a main spring, the main spring of the tensioning device surrounds the housing of the overpressure valve on an outside thereof up to a length of an interference fit assembly of the housing in the tensioning device.

8. The tensioner assembly according to claim 7 , wherein the tensioning device further comprises a hollow tensioning piston, and the overpressure valve is integrated into the hollow tensioning piston of the tensioning device.

9. The overpressure valve according to claim 1 , wherein the housing is a deep drawn part.

10. The overpressure valve according to claim 1 , wherein the guide sleeve is held within the housing by the force fit or form fit without additional securing elements.

Assignees

• Schaeffler Technologies Ag

Inventors

• Hartmann Christian
• Kroon Petrus Hubertus

Classifications

• F16H2007/0806

  Compression coil springs · CPC title

• F16K15/044 Primary

  spring-loaded · CPC title

• F16H2007/0859

  Check valves · CPC title

• F16K17/0406 Primary

  in the form of balls · CPC title

• Y10T137/7927

  Ball valves · CPC title