Fluid-pressure and analogous brake systems – Multiple fluid-receiving devices – Multiple motors
Patent
1980-02-22
1982-08-10
Reger, Duane A.
Fluid-pressure and analogous brake systems
Multiple fluid-receiving devices
Multiple motors
B60T 1368
Patent
active
043435173
ABSTRACT:
A hydraulic braking system for agricultural tractor-trailer combinations, taking hydraulic power from a pump on the tractor. The system includes a pressure control valve movable by the main hydraulic service supply to connect the main supply with a chamber in communication with a restricted bore and an outlet for the by-passed braking fluid. A pilot valve responsive to braking pressure, or manually operable, admits fluid to the trailer brakes and operates a check-valve closing a connection between the chamber and a return line for fluid not required for braking. The check valve enables a clean switching action and eliminates any tendency to meter at some intermediate pressure. Both constant flow and constant pressure systems are described. The return line may be connected to a low pressure sink or to the flow at the services outlet port preferably via another check valve.
REFERENCES:
patent: 3836205 (1974-09-01), Schwerin
patent: 3912334 (1975-10-01), Schwerin et al.
Clayton Dewandre & Company Limited
Reger Duane A.
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