Fluid-pressure and analogous brake systems – Multiple fluid-receiving devices – Multiple motors
Patent
1993-03-08
1995-02-21
Graham, Matthew C.
Fluid-pressure and analogous brake systems
Multiple fluid-receiving devices
Multiple motors
303 963, 303 972, 303 974, 303 975, 3031135, 303 841, B60T 826
Patent
active
053909879
ABSTRACT:
A hydraulic brake system metering valve includes an intergal brake switch having at least one pair of contacts. The brake switch contacts are movable between two positions. The combination valve includes a metering valve assembly having an axially shiftable metering rod. One end of the metering rod is adapted to operate the switch contacts. When pressure is initially applied to the brake system the metering rod shifts, causing the brake switch contacts to move from a first to a second position and thereby generate a first electrical signal. Upon release of the brake pressure, the metering rod shifts back, allowing the brake switch contacts to return to the first position and thereby generate a second electrical signal.
REFERENCES:
patent: 3480333 (1969-11-01), Stelzer
patent: 3549212 (1970-12-01), Leiber
patent: 3749451 (1973-08-01), Edsall
patent: 3825308 (1974-07-01), Kasselmann et al.
patent: 3937523 (1976-02-01), Ayers, Jr. et al.
patent: 3980345 (1976-09-01), Doerfler
patent: 4046426 (1977-09-01), Miyake
patent: 4068900 (1978-01-01), Doerfler et al.
patent: 5127713 (1992-07-01), Birkenbach
Cossins James M.
Willi Gary A.
Graham Matthew C.
Kelsey-Hayes Company
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