.~ Utilizing natural energy or having a geographic feature
DEFINITION
Classification: 60/398
(under subclass 327) Apparatus physically related to some feature of the earth or in which pressure or kinetic energy of nature energizes motive fluid.
(1) Note. This subclass includes devices providing a head of liquid that furnishes pressurized motive fluid to a motor.
SEE OR SEARCH THIS CLASS, SUBCLASS:
495+, for a motor driven by a buoyant working member;
639+, for a motor actuated by accumulating and dumping liquid or fluent material;
641, for a device in which natural heat energizes motive fluid.
SEE OR SEARCH CLASS 415, Rotary Kinetic Fluid Motors or Pumps,
2.1+, for a rotary kinetic fluid motor* or pump* with means for controlling casing* or flow guiding means in response to natural fluid current force or direction.
416, Fluid Reaction Surfaces (i.e., Impellers),
6, for an impeller driven by waves or impulses and subclasses 9+, for an unencased impeller adjustable in a fluid current.
417, Pumps,
330+, for a pump driven by a tide or wave motor; 334+, for a pump driven by a fluid current motor; and 337, for a pump driven by a buoyant motor.
