Brake apparatus with a combined brake cylinder and reservoir

Details Brake apparatus with a combined brake cylinder and reservoir Brake apparatus with a combined brake cylinder and reservoir

1977-03-04

1977-11-15

Reger, Duane A.

Fluid-pressure and analogous brake systems

Automatic

Synchronizing

92 64, B60T 1522

Patent

active

040583481

ABSTRACT:
This invention relates to a novel railway vehicle brake apparatus that comprises a brake cylinder device having two tandem-connected pistons of unequal size, the larger of which is provided with a check valve and cooperates with a hollow cylindrical body in which it is slidably disposed to form on its respective opposite sides two fluid pressure storage reservoirs wherein is stored fluid under pressure for effecting a brake application. This brake apparatus further comprises a novel brake control valve device that is so responsive to a reduction of pressure in a train brake pipe as to first cause simultaneous shifting of both pistons in a brake-applying direction and a transfer of fluid under pressure from one side of the larger piston to the other until a chosen braking force is transmitted through brake rigging to press brake shoes against the wheels of a vehicle. Thereafter, the control valve device is operative to release fluid under pressure from the one side of the larger piston to atmosphere to increase the braking force pressing the shoes against the wheels.

REFERENCES:
patent: 2031213 (1936-02-01), Farmer
patent: 3175869 (1965-03-01), Kirk
patent: 3183795 (1965-05-01), Kirk
patent: 4003606 (1977-01-01), Plantan

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