ES378471A3 - Improvements in notice devices for a vehicle hydraulic brake system. (Machine-translation by Google Translate, not legally binding) - Google Patents

Abstract

Improvements in warning devices for a hydraulic brake system for vehicles of the class that have a brake control cylinder, hydraulic brake actuators, and a hydraulic fluid circuit that interconnects the master cylinder and said actuators, providing said device, automatic warning of a fall in braking pressure in the system, characterized in that the device comprises in combination: (a) a body having an internal cylindrical chamber; (b) a closed end surface in said chamber; (c) a ball located in said chamber with freedom to move axially therein; (d) means that impel the ball in a rest position against the closed end surface of the chamber; (e) respective inlet and outlet ports in the wall of the cylindrical chamber for connection respectively to the brake control cylinder and to the hydraulic fluid circuit leading to the hydraulic brake actuators; (f) an electrically isolated contact located in the chamber in such a position that it is connected by the ball when the latter is displaced from its rest position; (g) a warning indicator device and (h) an excitation circuit for said indicator device, including said duct, to said contact, the position of said inlet and outlet ports being, and the shape of the end surface such that the ball is displaced from its position of rest in contact with the electrical contact to complete the excitation circuit for the indicating device only when a pressure drop occurs between the inlet and outlet ports due to the flow of hydraulic fluid through the chamber resulting from a loss of pressure in the hydraulic circuit. (Machine-translation by Google Translate, not legally binding)