Proportioning hydraulic brake mechanism

Details Proportioning hydraulic brake mechanism Proportioning hydraulic brake mechanism

1980-01-10

1984-06-12

Butler, Douglas C.

Fluid-pressure and analogous brake systems

Load control

Responsive to fluid pressure spring

180282, 188195, 303 6C, 303100, B60T 818, B60T 826

Patent

active

044537786

ABSTRACT:
A hydraulic brake control device has a load sensing component connected through an electric circuit to a motorized proportioning valve which loads or unloads a resilient member therein to vary the split point of the proportioning valve. The electric circuit has an attitude cutoff switch and a speed cutoff switch which deactuate the electric circuit when the vehicle is pitched or rolled above a predetermined horizontal attitude and moving faster than a predetermined speed, respectively. The electric circuit can either actuate the motor to load the resilient member within proportioning valve, unload the resilient member within proportioning valve, or render the motor inactive and maintain the proportioning valve in a status quo condition.

REFERENCES:
patent: 3257153 (1966-06-01), Strifler
patent: 3423936 (1969-01-01), Stelzer
patent: 3614175 (1971-10-01), Lawson
patent: 3938850 (1976-02-01), Pembleton et al.
patent: 3950037 (1976-04-01), Pembleton et al.
patent: 4049323 (1977-09-01), Hess
patent: 4050743 (1977-09-01), Knight
patent: 4058346 (1977-11-01), Burckhardt
patent: 4062597 (1977-12-01), Sawyer et al.
patent: 4073541 (1978-02-01), Nagase

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