Fluid handling – Flow affected by fluid contact – energy field or coanda effect – Utilizing diverse fluids
Patent
1979-05-18
1981-03-31
Cline, William R.
Fluid handling
Flow affected by fluid contact, energy field or coanda effect
Utilizing diverse fluids
137815, 137818, 137834, 137822, F15C 112
Patent
active
042587530
ABSTRACT:
A fluidic amplifier or switch for supplying pulses of a power gas to be controlled which is insensitive to load impedance or back pressure. One arm of the fluidic switch comprising part of the gas injection path is coupled to a working outlet and the other arm is coupled through a sonic orifice to a vent outlet. An orifice is provided in the downstream end of the power gas injection path, the injection pressure is maintained at preferably at least about twice the maximum back pressure and a substitute gas is injected into the arm of the fluidic switch not carrying the power gas to be controlled. The two gases are each alternately supplied to the working outlet and the vent outlet. When the power gas to be controlled is supplied to the working outlet, the substitute gas is supplied to the vent outlet and when the substitute gas is supplied to the working outlet, the power gas to be controlled is supplied to the vent outlet to maintain the pressure constant across the working outlet orifice.
REFERENCES:
patent: 3267948 (1966-08-01), Groeber
patent: 3348562 (1967-10-01), Ogren
patent: 3390611 (1968-07-01), Warren
patent: 3468328 (1969-09-01), Metzger
patent: 3570512 (1971-03-01), Thompson
patent: 3690337 (1972-09-01), Lagana
Avco Everett Research Laboratory, Inc.
Cline William R.
Frederick M. E.
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