Release device for emergency brake actuators

Details Release device for emergency brake actuators Release device for emergency brake actuators

1974-11-22

1976-01-13

Blix, Trygve M.

Fluid-pressure and analogous brake systems

Releasing

188170, 303 13, B60T 1502

Patent

active

039320030

ABSTRACT:
A release device adapted to be interposed in the air pressure line to an emergency brake actuator of the type which sets its brake by spring action if the pressure in the air pressure line should fail or should fall below a safe pressure; the release device including a main valve movable in response to pressure in the air pressure line to a first position communicating between the air pressure line and the emergency brake actuator; and, in absence of such pressure, is movable to a second position by air pressure from an auxiliary source such as a hand pump or, if needed, air from an available tire, wherein the inlet from the air pressure line is closed and air is supplied from such auxiliary source to the actuator so as to release its brake; the release device further including a bleed valve to insure against any back pressure on the main valve when the air pressure line is functioning.

REFERENCES:
patent: 3095067 (1963-06-01), Murty et al.
patent: 3272566 (1966-09-01), Clack
patent: 3285672 (1966-11-01), Avrea
patent: 3431031 (1969-03-01), Ike
patent: 3650568 (1972-03-01), Poplawski

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