Two-pressure brake control valve for airbrakes

Details Two-pressure brake control valve for airbrakes Two-pressure brake control valve for airbrakes

1977-02-11

1977-12-20

Reger, Duane A.

Fluid-pressure and analogous brake systems

Releasing

Motor

303 36, B60T 1522

Patent

active

040637840

ABSTRACT:
A two-pressure brake control valve has a service brake portion which is connected to a brake line, an auxiliary reservoir,an emergency reservoir and a brake cylinder. A main piston in the service brake portion is subjected to brake line pressure on one side and on its other side is subjected to pressure in the auxiliary reservoir. An auxiliary piston which has a greater sensitivity of response than the main piston is displaceable on the main piston and has one side subjected to the brake line pressure and its other side subjected to auxiliary reservoir pressure. A release acceleration valve is connected to the brake line and has an actuator in the displacement path of the auxiliary piston so as to be actuated to an open position upon movement of the auxiliary piston in the initial phase of a brake release operation. There is also a filling valve which is actuated in response to movement of the auxiliary piston to connect the emergency reservoir to the auxiliary reservoir during the release operation.

REFERENCES:
patent: 2012375 (1933-08-01), Campbell
patent: 3370893 (1968-02-01), McClure et al.
patent: 3966269 (1976-06-01), McEathron

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