Fluid-pressure and analogous brake systems – Speed-controlled – Having a valve system responsive to a wheel lock signal
Patent
1989-09-21
1991-02-19
Olszewski, Robert P.
Fluid-pressure and analogous brake systems
Speed-controlled
Having a valve system responsive to a wheel lock signal
303 50, 91434, 244111, B60T 1504, B64C 2522, F15B 1314
Patent
active
049937812
ABSTRACT:
A port control member is depressed by either a mechanical force applied on it by the pilot, for moving it to meter pressure and flow from a supply pressure to the wheel brakes, or a hydraulic pressure force applied following take-off, to actuate the brakes for stopping the wheels from spinning. The valve housing defines an annular pressure chamber surrounding a portion of the port control member. The port control member includes a feedback passageway between the pressure chamber and a feedback chamber formed between the inner end of the port control member and the valve housing. The port control member is also surrounded by a sleeve which has an inner surface extending radially outwardly from the inner end of the port control member. The feedback passageway, which can include a damping orifice, produces a feedback force to the pilot which is increased when the sleeve is jammed with respect to the port control member.
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Muratori A.
Olszewski Robert P.
The Boeing Company
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