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8096139 |
Refrigerant system with variable speed drive
A refrigerant system (10, 100, 200) is provided with a power control system (30, 130, 230). The power control system adjusts the speed of the motors driving the refrigerant system components such...
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7163379 |
Gradient liquid feed pump system, and liquid chromatograph
A gradient liquid feed pump system capable of liquid feed in a correct mixing ratio even in the case of liquid feed in which the mixing ratio varies. Specifically, it comprises a first plunger pump...
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5908462 |
Method and apparatus for antisurge control of turbocompressors having surge limit lines with small slopes
A turbocompressor's Surge Limit Line, displayed in coordinates of reduced flow rate (qr) and reduced head (hr), can be difficult to characterize if the slope of the line is small; that is, nearly...
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5743715 |
Method and apparatus for load balancing among multiple compressors
Balancing the load between compressors is not trivial. An approach is disclosed to balance loads for compression systems which have the characteristic that the surge parameters, S, change in the...
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5348076 |
Cooling apparatus for electronic system
A cooling apparatus for an electronic system, includes a coolant tank, main pumps, heat exchangers, a common supplementary pump, and supplementary check valves. The coolant tank temporarily stores...
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5259731 |
Multiple reciprocating pump system
The present invention discloses a system for pumping a fluid into a common pressure outlet. The system contains a plurality of reciprocating pumps. A separate sensor coupled to one cylinder of each...
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5218986 |
Pneumatically pressurized water pumping apparatus
Water pumping apparatus is described for use with wells in which on-off cycling in pump operation is minimized by providing an air compressor and compressed air holding tank feeding an pressure...
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5108263 |
Method of optimizing the operation of two or more compressors in parallel or in series
Method of optimizing the operation of two or more compressors in parallel or in series. Known methods of this type assume that the compressors are similar and attempt to optimize their operation by...
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5076767 |
Liquid flow metering
A system for metering the volume of a liquid, e.g. ink, supplied by a positive displacement pump to an installation, such as a printing press, employs a device for generating a first series of...
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4821761 |
Closed loop pump control system
A system for controlling the output flow rate of a second pump to proportionately track the output flow rate of a first pump in which the first pump produces an electrical signal at each successive...
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4699570 |
Vacuum pump system
A vacuum pump aggregate utilizes a microprocessor in conjunction with pressure and temperature sensors and motor control circuits to regulate the pressure by varying the speed of one or more vacuum...
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4552512 |
Standby water-powered basement sump pump
A water-powered positive displacement auxiliary sump pump has a drive water inlet connected to the municipal water supply via a float actuated pilot valve. The pump is designed to be constructed...
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4290735 |
Water pressure booster system
A plurality of relatively large, high capacity, high head, pumps disposed in parallel in the basement of a building provide water under pressure throughout the water pipes in a high rise building....
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4072168 |
Dual standpipe arrangement supplementing a water supply system
For use in connection with a water supply system wherein pumping means draws water from a source and supplies it to various consumers by way of a main and branch lines from a main, a supplement to...
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3844683 |
APPARATUS AND METHOD FOR CONTROLLED LIQUID TRANSFER
An apparatus and method for delivering a liquid to a plurality of outlets while automatically maintaining a liquid flow rate from each outlet within a preselected range during variations in the...
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3732034 |
CONTROL SYSTEM FOR COMPRESSORS OPERATING IN PARALLEL
Control apparatus for controlling the operation of a compressor station comprising at least two compressor plants connected to operate in parallel, includes means providing "raise" and "lower"...
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3512900 |
PNEUMATIC SEQUENCE CONTROLLER
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3511579 |
CONTROL SYSTEM FOR LIQUID PRESSURE BOOSTER SYSTEMS
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3294105 |
Combination domestic and firewater pumping system
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3251534 |
Compressor control system
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3151199 |
Control for supplying air to a blower load
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3092305 |
Precision pressure generator system
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3088655 |
Remote control and alarm system for a compressor station and compressor engines thereof
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3005411 |
Automatic remote control apparatus
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2922372 |
Pumping station
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