US PATENT SUBCLASS 137 / 820
.~.~.~.~ With feedback passage(s) between devices of cascade

Current as of: June, 1999
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137 /   HD   FLUID HANDLING

803  DF  FLOW AFFECTED BY FLUID CONTACT, ENERGY FIELD OR COANDA EFFECT (E.G., PURE FLUID DEVICE OR SYSTEM) {11}
814  DF  .~ System comprising plural fluidic devices or stages {1}
815  DF  .~.~ Plural power inputs (e.g., parallel inputs) {3}
819  DF  .~.~.~ To cascaded plural devices {2}
820.~.~.~.~ With feedback passage(s) between devices of cascade

DEFINITION

Classification: 137/820

(under subclass 819) System further provided with a connection from a power output passage of said second (i.e., downstream) device to a control input passage of said first device, whereby at least a portion of the power output fluid of the second device will affect the control input of the first device.

(1) Note. The comments relative to the cascade connection referred to in (1) Note of subclass 819 apply also to the feedback connection of this subclass.

SEE OR SEARCH THIS CLASS, SUBCLASS:

835, for a fluidic device having feedback means internal to the device.