Simplified full-function valve for heavy duty brake systems

Details Simplified full-function valve for heavy duty brake systems Simplified full-function valve for heavy duty brake systems

1995-03-28

1996-09-10

Butler, Douglas C.

Fluid-pressure and analogous brake systems

Multiple fluid-receiving devices

Multiple motors

303 976, 303 9, 303 40, B60T 1300

Patent

active

055539289

ABSTRACT:
A simplified integrated full-function valve for heavy duty brake systems comprising a valve body having individual ports for fluid communication with spring brake chambers, service brake chambers, pressurized-air reservoir and exhaust and for receiving pressurized control and supply air from respective sources thereof; internal passageways within the valve body providing selected fluid communication with the various ports; a plurality of valve modules within the valve body comprising a spring brake valve module, a relay valve module and a biased one-way pressure protection valve module, and disposed to selectively determine the fluid communications within the internal passageways and ports responsive to the respective positions of the valve modules; the port and related internal passageways for the spring brake chambers being fluid-communicatively-isolated from the reservoir, the service brake chambers and the control air, whereby the number of the internal passageways within the valve body is minimized; the simplified design lending itself to functional flexibility.

REFERENCES:
patent: 3992064 (1976-11-01), Carton et al.
patent: 4042281 (1977-08-01), Ury
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patent: 4472001 (1984-09-01), Fannin
patent: 4593954 (1986-06-01), Campanini
patent: 4915456 (1990-04-01), Gross et al.
patent: 5236250 (1993-08-01), Moody et al.
patent: 5322353 (1994-06-01), Wallestad
patent: 5445440 (1995-08-01), Plantan
patent: 5458403 (1995-10-01), Moody

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