US PATENT SUBCLASS 60 / 445
.~ Condition responsive control of pump or motor displacement

Current as of: June, 1999
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60 /   HD   POWER PLANTS

325  DF  PRESSURE FLUID SOURCE AND MOTOR {47}
445.~ Condition responsive control of pump or motor displacement {7}
446  DF  .~.~> Pump displacement varied responsive to position of motor or output device
447  DF  .~.~> Control actuated by a servo-motor fed by a speed indicating auxiliary pump
448  DF  .~.~> By means sensing rotational speed of output motor
449  DF  .~.~> By means sensing rotational speed of prime mover or pump
450  DF  .~.~> Choke in motor feed or discharge line establishes displacement control pressure (e.g., rate of flow responsive, etc.)
451  DF  .~.~> Controlled by torque of motor or motor discharge pressure
452  DF  .~.~> Pump displacement controlled by pump discharge or motor feed pressure

DEFINITION

Classification: 60/445

(under subclass 325) Apparatus having means by which the amount of motive fluid displaced for each stroke or revolution of a pump or motor device can be adjusted and having structure sensing a condition or position controlling the adjusting means.

SEE OR SEARCH THIS CLASS, SUBCLASS:

423, for a system in which variable delivery to a motor is

produced by automatically combining in different ways the outputs of plural pumps or pump sections.