Fluid control valve and braking system incorporating such a valve
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Apr 30, 2002
Grant Date -
N/A
app pub date -
Nov 27, 2000
filing date -
Mar 13, 1998
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A fluid flow valve having a body (11) with first, second and third fluid inlets (8, 18, 25), a working fluid outlet (4), a first pressure element (11) movable, under the influence of pilot pressure fluid applied to the first inlet, from a first position in which it causes closure of the second inlet, to a second position in which it causes opening of the second inlet, and a second pressure element (20) movable, in response to pressure at the fluid outlet, from a first position in which it causes closure of the third inlet (25) to a second position in which it causes opening of the third inlet, said elements (11, 20) operating in conjunction to permit an initial high volume fluid flow from the second inlet through the outlet and subsequently, with the second element causing interruption of a path between the second inlet and outlet, a high pressure fluid flow from the third inlet through the outlet. The invention embraces a vehicle braking system incorporating the aforesaid valve.
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