Fluid-pressure and analogous brake systems – Multiple systems – Fluid pressure and electric
Patent
1981-04-03
1983-09-06
Reger, Duane A.
Fluid-pressure and analogous brake systems
Multiple systems
Fluid pressure and electric
188 3R, 251138, 303 7, B60T 1368
Patent
active
044025530
ABSTRACT:
A braking system for towed vehicles is disclosed which provides for controlled application of hydraulic brakes in a towed vehicle in response to the application of the brakes by the driver of the towing vehicle. An electromagnetic variable valve means provides the responsive braking pressure in a towed vehicle by employing an electric current signal from the towing vehicle to create an electromagnetic force which is balanced against the hydraulic pressure present in the towed vehicle's brakelines. The variable valve means preferably includes a valve housing 44, a valve cap 16, electromagnet means 46, valve cap switch means 18 for activating a hydraulic pumping means, a hydraulic relief control valve stem means 52 and the pressure monitoring pin means 54
REFERENCES:
patent: 2190120 (1940-02-01), Kohler
patent: 3034598 (1962-05-01), Lafaye
patent: 3985395 (1976-10-01), Watanabe
patent: 4285497 (1981-08-01), Guttel
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