US PATENT SUBCLASS 415 / 4.1
.~ Natural fluid current force responsive

Current as of: June, 1999
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415 /   HD   ROTARY KINETIC FLUID MOTORS OR PUMPS

2.1  DF  WITH MEANS FOR CONTROLLING CASING OR FLOW GUIDING MEANS IN RESPONSE TO NATURAL FLUID CURRENT FORCE OR DIRECTION {4}
4.1.~ Natural fluid current force responsive {2}
4.2  DF  .~.~> Vertical runner axis
4.3  DF  .~.~> Axial flow runner

DEFINITION

Classification: 415/4.1

Natural fluid current force responsive:

(under subclass 2.1) Device wherein the adjusting means for the casing* or other working fluid* flow directing member acts in accordance to the strength of the flowing, unconfined, and natural working fluid.

(1) Note. A device comprising means for controlling a casing or other flow guiding member in accordance to runner* shaft* rotation speed is included in this and indented subclasses provided the shaft speed is dependent on the

strength of the flowing natural current. However, for a complete search for such subject matter, subclasses 30+ should be searched since those subclasses have not been screened for such subject matter.

SEE OR SEARCH THIS CLASS, SUBCLASS:

30+, for a device comprising control means responsive to noncyclic condition sensing of runner shaft rotation speed;

146, for a device including working fluid force responsive vane* or flow control.

148+, for other devices having flow regulating means.

SEE OR SEARCH CLASS 416, Fluid Reaction Surfaces (i.e., Impellers),

41, for an uncased rotor with control means responsive to relative natural fluid current velocity.