Patent ID: 8312705
Filing Date: 2012-11-20
Classification: F02K,Y10T

Abstract:
1. A gas control valve, comprising: a pilot stage including an inlet port, a pilot chamber, and a valve, the pilot stage inlet port adapted to receive pressurized gas from a pressurized gas source, the pilot stage adapted to receive control signals and operable, in response to the control signals, to move the pilot stage valve between a closed position, in which the pilot stage inlet port is not in fluid communication with the pilot stage pilot chamber, and an open position, in which the pilot stage inlet port is in fluid communication with the pilot stage pilot chamber; and a main stage including an inlet port, a control pressure port, an outlet port, and a valve, the main stage inlet port adapted to receive pressurized gas from the pressurized gas source, the main stage control pressure port in fluid communication with the pilot stage pilot chamber, the main stage valve responsive to differential gas pressure between the main stage inlet port and the pilot stage pilot chamber to move between a low flow position and a plurality of high flow positions, wherein: the pilot stage valve comprises: and wherein: