Fluid signal transmitting apparatus

Details Fluid signal transmitting apparatus Fluid signal transmitting apparatus

G - Physics

05

G

121/70

G05G 21/00 (2006.01) F15B 5/00 (2006.01)

Patent

CA 1159324

-0- FLUID SIGNAL TRANSMITTING APPARATUS Abstract Of The Invention A fluid signal inverting unit includes a motion balance unit having a lever which operates a valve. The balance lever is supported at the opposite ends by a pilot signal chamber and a feedback signal chamber and an intermediate pivot support is coupled to position a back pressure leakport valve. Each chamber includes an outer matched linear metal diaphragm fixedly connected to the aligned end of the lever. Increases in pilot pressure result in the outward movement of the linear diaphragm and corresponding outward and pivotal movement of the lever. The lever tends to move away from and open the valve resulting in a decrease in the output pressure and an inverted output pressure signal which may be further amplified and transmitted to a flow booster relay, and as negative feedback signal to the feedback chamber. Decrease in pilot pressure results in an opposite action and an increase output pressure. -0-

361324

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