US PATENT SUBCLASS 417 / 1
CONDITION RESPONSIVE CONTROL OF PUMP DRIVE MOTOR

Current as of: June, 1999
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417 /   HD   PUMPS

1CONDITION RESPONSIVE CONTROL OF PUMP DRIVE MOTOR {22}
2  DF  .~> Plural pumps having separate drive motors, supply sources, or delivery destinations {1}
9  DF  .~> By stopping pump in response to leakage into or from system
10  DF  .~> By controlling starter motor for internal combustion engine
11  DF  .~> By controlling free piston internal combustion engine
12  DF  .~> Having timer or delay means
13  DF  .~> Responsive to pump lubricant, sealant, or coolant condition
14  DF  .~> Having ambient condition responsive means
15  DF  .~> With control of pump drive transmission
16  DF  .~> With plural separate drive motors for single pump unit
17  DF  .~> With plural separate drive motor controlling elements
18  DF  .~> Single motor control element responsive to means sensing diverse conditions {4}
25  DF  .~> Relatively movable elements sensing same system pressure for single control element
26  DF  .~> With condition responsive control of pump fluid valve {3}
32  DF  .~> Responsive to pump or pump fluid temperature
33  DF  .~> Pump stop control means requiring manual reset
34  DF  .~> By controlling internal combustion drive engine
35  DF  .~> By controlling wind motor in response to liquid accumulation
36  DF  .~> Responsive to accumulation of pumped liquid in receiver {4}
42  DF  .~> In response to pump speed
43  DF  .~> Responsive to change in rate of pump fluid flow
44.1  DF  .~> By control of electric or magnetic drive motor {3}
46  DF  .~> By controlling drive motor motive fluid {1}

DEFINITION

Classification: 417/1

(under the class definition) Subject matter in which the pump is provided with (1) a motor to drive the fluid moving element thereof, (2) control means to control the motor in some manner and (3) a separate sensing means which is responsive to the occurrence of a condition or a change in condition of either the pump or the fluid being pumped and which causes operation of the control means to alter the operation of the motor.

(1) Note. Sensing of the speed of a motor which is mechanically connected to the pump for driving same is considered as sensing a condition of the pump and is included under this definition.

SEE OR SEARCH THIS CLASS, SUBCLASS:

187+, for regulation of a jet pump by motive fluid control, jet pumps not being considered as motor driven.

196+, for diverse pumps having condition responsive control of a drive motor for one pump which is a mere priming pump for another.

212+, for condition responsive control of a pump drive transmission. 321+, for pumps which are cyclically driven by a cyclically operable motor and in which the control of the motor is caused to operate cyclically by a cyclically changing condition of the pump or pump fluid such that this change of condition and its control of the motor are the normal manner of operation.