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Class Information
Number: 417/29
Name: Pumps > Condition responsive control of pump drive motor > With condition responsive control of pump fluid valve > Fluid and motor controls separately responsive to diverse conditions
Description: Subject matter in which the valve means is controlled in response to one condition of the system and the control means for the motor is responsive to a second condition which (1) differs in kind from the first, e.g., pressure and flow rate, or (2) if of the same kind, differs by the part of the system characterized by the condition, e.g., inlet and discharge pressures of the pump.










Sub-classes under this class:

Class Number Class Name Patents
417/30 Liquid accumulation controlled discharge valve downstream of motor controller sensing means 6


Patents under this class:

Patent Number Title Of Patent Date Issued
8662856 Pump control system Mar. 4, 2014
7188008 System for controlling the operation of at least one aircraft engine Mar. 6, 2007
6751941 Foil bearing rotary flow compressor with control valve Jun. 22, 2004
6158965 Fluid flow resistance monitoring system Dec. 12, 2000
5820352 Method for controlling compressor discharge pressure Oct. 13, 1998
5762475 Automatic solenoid control valve calibration Jun. 9, 1998
5584665 Liquid drainage system with pneumatic sensor Dec. 17, 1996
5452989 Reverse phase and high discharge temperature protection in a scroll compressor Sep. 26, 1995
5197859 Well pump system Mar. 30, 1993
4708594 Method of starting a variable-speed pump turbine or a variable speed pump Nov. 24, 1987
4432698 Compressor having a starting load reducing apparatus Feb. 21, 1984
4358247 Oil cooled compressor Nov. 9, 1982
4344741 Automatic water supply system Aug. 17, 1982
4321014 Constant flow pumping apparatus Mar. 23, 1982
4246938 Vapor collecting system Jan. 27, 1981
4243349 Containers for goods Jan. 6, 1981
3994623 Method and apparatus for controlling a dynamic compressor Nov. 30, 1976
3957395 Method and apparatus for controlling a pump May. 18, 1976
3951568 Pump check valve control apparatus Apr. 20, 1976











 
 
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