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Class Information
Number: 417/5
Name: Pumps > Condition responsive control of pump drive motor > Plural pumps having separate drive motors, supply sources, or delivery destinations > Pumps in parallel flow paths with common inflow or outflow > Having means sensing condition in common inflow or outflow line > With control of plural pump drive motors
Description: Subject matter in which each of said plural pumps is driven by separate drive motor and the control means is operative to simultaneously or relatively control the operation of each of said plural drive motors.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7252483 |
Method of managing time, at which maintenance in a gas compressor multiple system should be carried out |
Aug. 7, 2007 |
| 7100632 |
Sump liner |
Sep. 5, 2006 |
| 6973798 |
Air conditioning system for vehicle |
Dec. 13, 2005 |
| 6874326 |
Air conditioning system with two compressors and method for operating the same |
Apr. 5, 2005 |
| 6854479 |
Sump liner |
Feb. 15, 2005 |
| 6840743 |
Plural fan installation for a cooling system for a motor vehicle, with a control unit, for controlling plural fan motors, mounted within one motor housing |
Jan. 11, 2005 |
| 6453927 |
Method and apparatus for precisely dispensing liquids |
Sep. 24, 2002 |
| 6419454 |
Air compressor control sequencer |
Jul. 16, 2002 |
| 6378554 |
Controlled sewage sump network system |
Apr. 30, 2002 |
| 6368064 |
Apparatus and method of providing redundant power and redundant fan speed control to a plurality of fans |
Apr. 9, 2002 |
| 6325093 |
Water distributing installation controllers |
Dec. 4, 2001 |
| 6266952 |
Process for controlling compressors |
Jul. 31, 2001 |
| 6257833 |
Redundant, dedicated variable speed drive system |
Jul. 10, 2001 |
| 6244838 |
Fluid pumping process and system using a pump with a constant intake or delivery rate |
Jun. 12, 2001 |
| 6047902 |
Road marking machine with a pump combination driven in proportion with the traveling speed |
Apr. 11, 2000 |
| 6045332 |
Control system for multi-pump operation |
Apr. 4, 2000 |
| 5979478 |
Apparatus and method for treating water in a water supply system |
Nov. 9, 1999 |
| 5974345 |
Dairy chemical dispensing system |
Oct. 26, 1999 |
| 5925220 |
Suction roll of a paper machine having a noise damping chamber |
Jul. 20, 1999 |
| 5845509 |
Variable speed parallel centrifugal compressors for HVAC and refrigeration systems |
Dec. 8, 1998 |
| 5743715 |
Method and apparatus for load balancing among multiple compressors |
Apr. 28, 1998 |
| 5743714 |
Method and apparatus for minimum work control optimization of multicompressor stations |
Apr. 28, 1998 |
| 5636971 |
Regulation of fluid conditioning stations |
Jun. 10, 1997 |
| 5586574 |
Air system control |
Dec. 24, 1996 |
| 5586444 |
Control for commercial refrigeration system |
Dec. 24, 1996 |
| 5503533 |
Fluid level control panel structure for multi-pump system |
Apr. 2, 1996 |
| 5494112 |
System for introduction of concentrated liquid chemical foamant into a water stream for fighting fires |
Feb. 27, 1996 |
| 5484012 |
Electronic apparatus having cooling system |
Jan. 16, 1996 |
| 5425502 |
VAV air conditioning system with a by-pass air supply fan |
Jun. 20, 1995 |
| 5417649 |
Fluid transfusing device and method of control therefor |
May. 23, 1995 |
| 5370799 |
Elevated temperature-pressure flow simulator |
Dec. 6, 1994 |
| 5360320 |
Multiple solvent delivery system |
Nov. 1, 1994 |
| 5351705 |
Method and apparatus for controlling fluid pumps and valves to regulate fluid pressure and to eliminate fluid flow surges |
Oct. 4, 1994 |
| 5347467 |
Load sharing method and apparatus for controlling a main gas parameter of a compressor station with multiple dynamic compressors |
Sep. 13, 1994 |
| 5329216 |
Multi-shaft driving apparatus and fluid rotary apparatus |
Jul. 12, 1994 |
| 5259731 |
Multiple reciprocating pump system |
Nov. 9, 1993 |
| 5253981 |
Multichannel pump apparatus with microflow rate capability |
Oct. 19, 1993 |
| 5228289 |
Plural hydraulic pump system with unloading valve |
Jul. 20, 1993 |
| 5211031 |
Scroll type compressor and refrigeration cycle using the same |
May. 18, 1993 |
| 5141402 |
Power transmission |
Aug. 25, 1992 |
| 5097670 |
Water chilling method and apparatus for the same |
Mar. 24, 1992 |
| 5026255 |
Pulseless pump apparatus having pressure crossover detector and control means |
Jun. 25, 1991 |
| 4729717 |
Power transmission |
Mar. 8, 1988 |
| 4714545 |
Fluid proportioning pump system |
Dec. 22, 1987 |
| 4711275 |
Air supply and control apparatus for inflatable mattress |
Dec. 8, 1987 |
| 4655688 |
Control for liquid ring vacuum pumps |
Apr. 7, 1987 |
| 4511311 |
Fluid system control apparatus and method |
Apr. 16, 1985 |
| 4494006 |
Method and apparatus for controlling a multicompressor station |
Jan. 15, 1985 |
| 4435194 |
Circuit for ventilating and filtering the medium contained in a confinement enclosure |
Mar. 6, 1984 |
| 4371315 |
Pressure booster system with low-flow shut-down control |
Feb. 1, 1983 |
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