Fluid handling – Flow affected by fluid contact – energy field or coanda effect – Responsive to condition external of system
Patent
1983-05-06
1985-06-18
Chambers, A. Michael
Fluid handling
Flow affected by fluid contact, energy field or coanda effect
Responsive to condition external of system
137833, 137836, 137840, 137835, F15C 106, F15C 400
Patent
active
045236119
ABSTRACT:
A method and apparatus for converting the absolute pressure of a pressuri fluid to a differential pressure indicating the fluid pressure relative to a reference pressure. The pressurized fluid is directed asymmetrically into a laminar proportional amplifier (LPA) along a centerline toward a first of two outlets at a velocity determined by the fluid pressure. The LPA includes first and second control inlets disposed on opposite sides of the directed fluid jet and connected to a common source of control fluid, the first control inlet being disposed on the same side as the first outlet, and the second control inlet being disposed on the same side as the second outlet. The first and second control inlets include respective first and second downstream control edges which are asymmetrically disposed on opposite sides of the jet, with the second control edge being disposed closer than the first control edge to the centerline; consequently, the jet is deflected towards the second outlet in accordance with the jet velocity such that the differential pressure generated by the jet between the first and second outlets is zero when the fluid pressure is equal to the reference pressure.
REFERENCES:
patent: 3191623 (1965-06-01), Bowles
patent: 3415262 (1968-12-01), Chatmon
patent: 3420255 (1969-01-01), Wilkerson
patent: 3529612 (1970-09-01), Rausch
patent: 3566689 (1971-03-01), Ringwall et al.
patent: 3570514 (1971-03-01), Sutton et al.
patent: 3578010 (1971-05-01), Campagnuolo
patent: 3703633 (1972-11-01), Honada et al.
patent: 4369811 (1983-01-01), Monion et al.
Chambers A. Michael
Elbaum Saul
Gibson Robert P.
Lane Anthony T.
The United States of America as represented by the Secretary of
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