|국가/구분||United States(US) Patent 등록|
|국제특허분류(IPC7판)||F16K-031/12 F16K-049/00 F16K-037/00|
|미국특허분류(USC)||137/811 ; 137/340 ; 137/556 ; 251/29|
|발명자 / 주소|
|출원인 / 주소|
|인용정보||피인용 횟수 : 11 인용 특허 : 4|
In one form of the invention, the control apparatus includes two stages: a poppet first stage and a piston second stage. The poppet first stage includes an altitude sensitive evacuated bellows coupled to a poppet valve. The second stage piston includes a pair of opposing head portions separated by a rod portion. The apparatus includes an output port which is coupled to a low pressure pneumatic signal or to a high pressure pneumatic signal, depending upon the position of the piston. For altitudes less than a predetermined altitude, e.g., 20,000 feet, the ...
Altitude sensing control apparatus for a gas turbine engine of the type including a compressor section which receives an input airflow and develops a pressurized output airflow, which comprises: (a) means coupled to ambient air for developing a first pneumatic signal representative of ambient air pressure; (b) means coupled to said compressor section for receiving a portion of said pressurized output airflow and developing a second pneumatic signal representative of said pressurized output airflow; and (c) pneumatic valve switching means for receiving sa...