Fluid-pressure and analogous brake systems – Multiple fluid-receiving devices – Multiple motors
Patent
1987-04-17
1988-10-04
Kashnikow, Andres
Fluid-pressure and analogous brake systems
Multiple fluid-receiving devices
Multiple motors
303 40, 303 54, B60T 1300, B60T 1502, B60T 1512
Patent
active
047751924
ABSTRACT:
An apparatus is disclosed for the control of brake pressure in a trailer pulled by a tractor. The apparatus includes a two-circuit controllable relay valve as the trailer control valve. The first circuit is controlled by the brake valve of the tractor with the pressure from the brake apparatus of such tractor. The second circuit can be optionally-connected to a distribution valve with a pressure medium source with a specified pressure or with atmosphere. Activation of the distribution valve is controlled so that the distribution valve connects the second circuit with the pressure medium source before or at the beginning of the activation of the first circuit. With this apparatus, the brake pressure can be increased in the brake apparatus of the trailer prior to increase of the brake pressure in the brake apparatus of the tractor. The level of brake pressure increased first in the brake unit of the trailer can be regulated by a set screw acting on the trailer control valve.
REFERENCES:
patent: 3041114 (1962-06-01), Stelzer
patent: 3944294 (1976-03-01), Masuda et al.
Pohl Wolfgang
Reinecke Erich
Schulz Hans-Joachim
Kashnikow Andres
Newholm Timothy
Ray, Jr. J. O.
Wabco Westinghouse Fahrzeugbremsen GmbH
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