|국가/구분||United States(US) Patent 등록|
|미국특허분류(USC)||137/197; 137/558; 060/453|
|§371/§102 date||20100813 (20100813)|
|발명자 / 주소|
|출원인 / 주소|
|대리인 / 주소||
|인용정보||피인용 횟수 : 2 인용 특허 : 34|
An auto bleed valve and method of bleeding a hydraulic system of an aircraft is accomplished by illuminating a plenum of a bleed valve using an LED oriented to illuminate a phototransistor when air is present in the plenum. A comparator circuit is used on an output of the phototransistor such that a predetermined voltage output corresponds to air detected in the plenum. An integrating circuit and a second comparator in series with the first comparator circuit is used to determine when a predetermined time period is met in which air is continuously detect...
1. An automatic bleed valve comprising: a plenum chamber;an air detection system comprising an LED and a photoelectric diode, the LED configured to illuminate the photoelectric diode when air is detected in the plenum chamber;a first comparator circuit which takes in the output voltage of the photoelectric diode, the first comparator circuit provides a generally constant output voltage when the output voltage of the photoelectric diode corresponds to a voltage signaling that air is detected in the plenum chamber;an integrator circuit in series with the f...