Fluid-pressure and analogous brake systems – Speed-controlled – Having a valve system responsive to a wheel lock signal
Patent
1976-04-05
1978-01-03
Halvosa, George E. A.
Fluid-pressure and analogous brake systems
Speed-controlled
Having a valve system responsive to a wheel lock signal
92 84, 137509, B60T 804
Patent
active
040663019
ABSTRACT:
In a modulator assembly for a vehicle anti-skid braking system comprising a housing having a chamber of which the effective volume is variable by an expander piston to modulate the pressure supplied to a wheel brake in accordance with skid conditions, the chamber comprises first and second compartments, and a valve assembly is located in the housing to control communication between the compartments. The valve assembly is closed when the expander piston is in an advanced position in which the effective volume of the chamber is substantially at a minimum so that a first area of the piston is exposed only to pressure in one of the compartments, and the valve assembly is open when the expander piston is retracted away from the advanced position so that a second area of the piston which is greater than the first is exposed to pressure in both compartments.
REFERENCES:
patent: 2847829 (1958-08-01), Gladden
patent: 3414336 (1968-12-01), Atkin et al.
patent: 3495882 (1970-02-01), Stelzer
patent: 3671085 (1972-06-01), Pasek et al.
patent: 3865440 (1975-02-01), Ostwald
Girling Limited
Halvosa George E. A.
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