Electrically controlled pneumatic multi-branch pipe valve embedded element

Abstract

A valve insert comprises a bushing assembly, a piston assembly and a spring. Its design prevents non-longitudinal movement of the piston assembly as it is moved within the longitudinal bore of the bushing assembly. This virtually eliminates the bell clapper effect commonly suffered by many of the valve inserts currently used in the industry. The design of the valve insert also avoids the pressure imbalances inherent to the prior art valve inserts. The valve insert is designed to fit snugly and sealingly within a suitable borehole, such as the fill and cut-out boreholes of an ECP manifold assembly.

Description

[0001] The present invention relates to a U.S. patent application entitled "ECP Manifold Ventilation Valve Insert" with application number 09 / 605,762. This patent application has the same assignee and the application date of June 28, 2000, and the principle of the patent application is cited here for reference in this application. Technical field [0002] The present invention generally relates to a valve assembly (also called a "valve insert") used in a manifold for controlling fluid flow in a system in which the manifold is installed. More specifically, the present invention relates to valve inserts designed to be used in the manifold of freight railcars equipped with electro-controlled pneumatic (ECP) braking equipment. Background technique [0003] The following background information helps readers understand only one of the many environments in which the invention can be applied. Unless clearly expressed in this application, the terms used herein will not be limited to a spec...

AI Technical Summary

Problems solved by technology

However, these flanges do little to prevent the bottom end of the shaft 912 from moving back and forth, side to side, as is clearly seen in FIG. 2

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