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Solenoid valve seat and method of making same

A technology of valve seat and valve cavity, which is applied in the field of ABS pneumatic braking system, can solve the problems of undurable, expensive, and unstable performance of synthetic rubber valve seat, achieve good performance, ensure effective sealing, and enhance performance

Inactive Publication Date: 2002-10-30
BENDIX COMML VEHICLE SYST LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the performance instability, cost and durability of synthetic rubber valve seats prompted the consideration of alternative devices

Method used

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  • Solenoid valve seat and method of making same
  • Solenoid valve seat and method of making same
  • Solenoid valve seat and method of making same

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Embodiment Construction

[0018] Reference is made only to the drawings showing a preferred embodiment of the present invention and its manufacturing method, but the present invention is not limited thereto. FIG. 1 shows a valve device 10 comprising a housing 12 with an inlet 14 and an outlet 16 . The housing 12 includes a cavity forming a valve chamber 18 between the inlet and the outlet. Although the inlet and outlet are axially aligned, it should be understood that the invention is not particularly limited to the illustrated embodiment.

[0019] More particularly, the valve device of the present invention is a solenoid valve seat for use in an anti-lock braking system (ABS) module. As shown, the solenoid valve arrangement is in a normally closed position wherein a valve member such as a ball 30 is urged by a biasing member such as a coil spring 32 towards a closed position near the outlet.

[0020] For the reasons stated in the background section above, in braking systems for heavy vehicles or tru...

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PUM

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Abstract

An improved, air tight valve seat for a pneumatic brake system is achieved by using a plastic valve seat that is coined by the valve member. The valve member is a harder material, for example metal, than the thermo-plastic valve seat. The valve member is brought to an elevated temperature less than the melting point of the valve seat. The valve member engages the valve seat, coining the desired surface of the valve seat to conform it to the valve member. The heated valve member then remains in the valve assembly after coining.

Description

technical field [0001] The present invention relates to an ABS pneumatic braking system for a heavy vehicle, and more particularly, the present invention relates to an improved valve seat for a solenoid valve assembly used in a module associated with a pneumatic braking system. Background technique [0002] Solenoid valve assemblies, especially their valve seats, are common structural components in pneumatic braking systems. Typically, the seat is made or molded from synthetic rubber. Rubber is ideal because it has good sealing properties to match the valve member. That is, the elasticity of the rubber provides a good airtight seal when the valve seat and valve member are fitted together. This is one of the reasons why rubber valve seats are widely used in pneumatic brake systems. [0003] On the other hand, rubber or synthetic rubber seats are relatively expensive. Also, due to the compressibility of rubber, an increased stroke is required to operate or seal the rubber ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60T8/34B60T8/36B60T15/02F16K25/00F16K29/00F16K31/06
CPCB60T8/342B60T8/362B60T15/027F16K29/00Y10T29/49409Y10T137/0491
Inventor 青·胡迈克尔·D·托伯尔罗伯特·J·赫布斯特
Owner BENDIX COMML VEHICLE SYST LLC