Fluid-pressure and analogous brake systems – Pulsation neutralizers
Patent
1990-03-12
1991-12-24
Butler, Douglas C.
Fluid-pressure and analogous brake systems
Pulsation neutralizers
138 30, B60T 1700, F16L 5504
Patent
active
050746251
ABSTRACT:
Disclosed is a regulator for use in fluid braking systems of motor vehicles, particularly hydraulic braking systems. The regulator includes a housing which is advantageously formed of a main housing piece and a detachable cap piece. A resilient bulb is mounted within the housing, such as between the main piece and cap. The housing includes a bulb cavity in which expandable portions of the resilient bulb are mounted. The bulb cavity is larger than the resilient bulb so that increased braking pressures applied by the braking system to the interior of the bulb cause the bulb to expand outwardly within the cavity. The space between the interior surfaces of the cavity and the outer surfaces of the bulb define a bulb restraint chamber. The housing is preferably provided with a restraint pressure supply which allows a desired, elevated restraint pressure to be established within the restraint chamber. The bulb restraint chamber is advantageously provided with a restraint member which is preferably elastic and mounted to the interior surfaces of the bulb cavity so as to extend inwardly. The restraint member is positioned to engage the bulb within a medial band. The restraint member provides decreasing responsiveness of the bulb as braking pressure increaees but increases responsiveness at high pressures which would otherwise fully expand the bulb. This and the pressurized restraint chamber provide improved operation over a wide range of braking pressures.
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