Fluid-pressure and analogous brake systems – Speed-controlled – Having a valve system responsive to a wheel lock signal
Patent
1976-06-28
1977-07-12
Reger, Duane A.
Fluid-pressure and analogous brake systems
Speed-controlled
Having a valve system responsive to a wheel lock signal
303 61, 303119, B60T 802
Patent
active
040350347
ABSTRACT:
An antiskid device for air brakes comprising a modulator mounted in a pressurized air line connecting a brake valve to brake actuators, and a signal producing means adapted to produce a throttling electric signal and a pressure reducing electric signal whereby the speed of the wheels can be controlled and the slip rate of the wheels can be maintained at an approximate optimum level of 0.2. The modulator comprises a first valve which can move between an open position in which it allows pressurized air from the brake valve to pass freely therethrough and a discharge position in which it causes the pressurized air from the brake actuators to be discharged through an outlet port, a second valve connected in series with the first valve and capable of moving between an open position in which it allows the pressurized air to pass freely therethrough and a throttling position in which it allows the pressurized air to pass therethrough in a reduced quantity, a first valve operating means for operating the first valve and a second valve operating means for operating the second valve.
REFERENCES:
patent: 3724915 (1973-04-01), MacDuff
patent: 3741612 (1973-06-01), Ando
patent: 3749125 (1973-07-01), Peruglia et al.
patent: 3854501 (1974-12-01), Machek
patent: 3913983 (1975-10-01), Sekiguchi
Chaskin Jay L.
Reger Duane A.
Sanwa Seiki Mfg. Co. Ltd.
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