US PATENT SUBCLASS 474 / 69
CONTROL FOR VARIABLE INPUT TO OUTPUT SPEED-RATIO

Current as of: June, 1999
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474 /   HD   ENDLESS BELT POWER TRANSMISSION SYSTEMS OR COMPONENTS

69CONTROL FOR VARIABLE INPUT TO OUTPUT SPEED-RATIO {7}
70  DF  .~> Condition responsive (e.g., responsive to speed, load, etc.)
71  DF  .~> Cyclical or sequential (e.g., machine controlled, etc.)
72  DF  .~> Including intermeshing gears in one drive train
73  DF  .~> Including separate belt on each of coaxial pulleys selectively engaged in drive train {3}
77  DF  .~> Including coaxial pulleys shiftable axially to align selected pulley with drive belt
78  DF  .~> Including belt shiftable axially from one to another surface of stepped pulley or coaxial pulleys of different diameter {2}
83  DF  .~> Including mechanism for shifting belt axially on spaced pulleys with tapering drive face

DEFINITION

Classification: 474/69

CONTROL FOR VARIABLE INPUT TO OUTPUT SPEED-RATIO:

Subject matter under the class difinition wherein the mechanism is provided for changing the number or fractional number of revolutions made by an output load driving member for each revolution made by an input member, the output and input members being interconnected via a belt*.

SEE OR SEARCH THIS CLASS, SUBCLASS:

8+, for a variable speed device using a pulley with a belt-receiving groove formed by drive faces on relatively axially movable coaxial confronting members.

47+, for a variable speed device using a pulley with expansible rim means or pulleys with alternately useable nestable rims.

SEE OR SEARCH CLASS

19, Textiles: Fiber Preparation,

240+, for speed changing in connection with a fiber drafting device.

57, Textiles: Spinning, Twisting, and Twining, 93, for speed adjustment of a driving mechanism.

74, Machine Element or Mechanism, appropriate subclasses for other gearing and gearing combinations having control for variable speed.

180, Motor Vehicles,

230, for a two-wheeled vehicle with change speed means

between the motor and driven wheel.

318, Electricity: Motive Power Systems,

6+, for control of variable speed in a device being driven. [figure]