Pneumatically driven train brake pipe pressure exhaust valve

Details Pneumatically driven train brake pipe pressure exhaust valve Pneumatically driven train brake pipe pressure exhaust valve

1997-03-11

1999-08-24

Lee, Kevin

Fluid handling

Systems

Multiple inlet with single outlet

137607, 137628, 251 612, F16K 31126

Patent

active

059412801

ABSTRACT:
A valve device for reducing the brake pipe pressure in a railroad train brake pipe at a location remote from a train locomotive including a pair of valves, a first valve to controllably vent brake pipe pressure from the brake pipe for purposes of service brake applications and a second valve to quickly vent brake pipe pressure from the brake pipe at a relatively high rate for purposes of emergency brake applications, and a pneumatic drive means to open the first valve in response to a controlled supply pressure and open the second valve in response to an emergency supply pressure.

REFERENCES:
patent: 1184143 (1916-05-01), Slater
patent: 2639908 (1953-05-01), Graham
patent: 4615353 (1986-10-01), McKee
patent: 5586813 (1996-12-01), McKay et al.

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