US PATENT SUBCLASS 416 / 120
PLURAL IMPELLERS HAVING RELATIVE MOVEMENT OR INDEPENDENT SUPPORTS

Current as of: June, 1999
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416 /   HD   FLUID REACTION SURFACES (I.E., IMPELLERS)

120PLURAL IMPELLERS HAVING RELATIVE MOVEMENT OR INDEPENDENT SUPPORTS {5}
121  DF  .~> Shiftable support
122  DF  .~> Intersecting or interdigitated paths of operation
123  DF  .~> Divergent rotation axes
124  DF  .~> Coaxial rotation {4}
130  DF  .~> Differential or independent adjustment

DEFINITION

Classification: 416/120

(under the class definition) Apparatus comprising two impellers* which are independently supported* or which move relative to one another during use.

(1) Note. Movement of one impeller relative to another comprises (1) different impelling movement (e.g., rotation in the opposite direction, in the same direction at variable speeds, or positive drive of one and free rotation of another), (2) relative pitch* adjustment, or (3) moving one impeller closer to or away from another impeller by means other than mere adjustment of securing means for the impeller.

(2) Note. Synchronizing means for a plurality of motors driving individual impellers is in Class 318, Electricity: Motive Power Systems, subclasses 41+ where the motors have synchronizing interconnections, and subclass 85 where the motors have a synchronizing or phasing control; a synchronizer for plurality of shafts is in 361, Electricity: Electrical Systems and Devices, subclasses 243+ and a synchronizer for a plurality of nonelectrical motors is in Class 60, Power Plants, subclasses 700+.

SEE OR SEARCH THIS CLASS, SUBCLASS:

33+, for apparatus having plural distinct impellers with an interrelated control actuated by (1) means sensing a noncyclic condition, (2) centrifugal force, or (3) torque or thrust.

198+, for plural impellers which are axially spaced on the same support* and which are not relatively movable.

SEE OR SEARCH CLASS 60, Power Plants,

700+, for synchronizing of plural motors, and see (2) Note above.

74, Machine Element or Mechanism,

640+, for gearing with impellers recited by name only, and subclasses 665+ for gear mechanisms for driving a plurality of impellers from a single driving means, and see (2) Note above.

244, Aeronautics,

17.23, for plural gyroplane rotors combined with significant vehicle structure; subclass 55 for the arrangement of two or

more power plants on an aircraft where more structure than that is necessary to mount the power plants is claimed; and subclass 65, for two or more impellers mounted on an aircraft where more structure than that necessary to mount the impellers is claimed.

318, Electricity: Motive Power Systems,

41+, and 85, and see (2) Note above.

361, Electricity: Electrical Systems and Devices,

243+, for electrical synchronizers for rotary shafts and see (2) Note above.

440, Marine Propulsion, 79+, for ships having multiple screw propellers.

475, Planetary Gear Transmission Systems or Components, appropriate subclasses, for planetary gearing to drive plural load devices.