Pneumatically controlled relay valve arrangements

Details Pneumatically controlled relay valve arrangements Pneumatically controlled relay valve arrangements

1984-06-11

1986-03-11

Reger, Duane A.

Fluid-pressure and analogous brake systems

Automatic

Application valve

B60T 1502

Patent

active

045751579

ABSTRACT:
A pneumatically controlled double seat relay valve including a housing for accommodating a reciprocating control piston having a first reactive surface acted upon by a source of control pressure and having a second reactive surface acted upon by a source of working pressure. A spring biasing valve piston slidably disposed in a tubular projection formed in the control piston. A spring biased slidable valve member disposed in a central bore formed in the housing and including an inlet valve cooperatively associated with an inlet valve seat formed by an annular lip of the central bore. An outlet valve seat carried by the slidable valve member and cooperatively associated with one side of the valve piston to initially close the outlet valve and subsequently open the inlet valve when control pressure is applied to the first reactive surface and for allowing the inlet valve to close when working pressure is applied to the one side of the slidable valve member to overcome the spring bias.

REFERENCES:
patent: 3291539 (1966-12-01), Bueler
patent: 4300805 (1981-11-01), Reinecke

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