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"What, sir, would you make a ship sail against the wind and currents by lighting a bonfire under her deck? I pray you, excuse me, I have not the time to listen to such nonsense."
Napoleon Bonaparte ; When told of the Robert Fulton steamboat
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| Number | Title | Issue Date |
| 7290989 | Compressor protection and diagnostic system A compressor assembly includes a shell, a compressor housed within the shell, and a motor drivingly connected to the compressor. In addition, a sensor assembly is provided for monitoring operating parameters of the compressor assembly. Processing circuitry, in commu... | 11/06/2007 |
| 7275916 | Integrated engine/compressor control for gas transmission compressors A method and system for controlling an engine that drives a reciprocating compressor, such as the large compressors used for natural gas transmission. A controller receives data from the compressor representing operation conditions, such as load step, suction pressu... | 10/02/2007 |
| 7228461 | System, method, and user interface for acceptance testing Certain exemplary embodiments provide a method comprising automatically enforcing user compliance with a plurality of predetermined steps of a computer-assisted verification test of a safety feature for a machine system; inducing an error condition in the machine sy... | 06/05/2007 |
| 7210310 | Refrigerant cycle apparatus There is provided, as an object of the present invention, a refrigerant cycle apparatus capable of smoothly cooling an inverter module for driving a motor of an electric compressor while preventing enlargement of an installation space as much as possible. In the ref... | 05/01/2007 |
| 7182583 | Electro-hydraulic power unit with a rotary cam hydraulic power unit An electro-hydraulic power unit is disclosed that includes a housing filled with hydraulic fluid. A hydraulic power unit is disposed within the housing, the power unit having a mechanical power shaft. Additionally, an electric machine is disposed within the housing ... | 02/27/2007 |
| 7104057 | Concrete-mortar transfer system of concrete pump car A concrete transfer system for a concrete pump car has a pair of concrete input tubes mounted in a hopper, first and second drive cylinders operating with the concrete input tubes for inputting and outputting the concrete by pressure pistons each having a driving ro... | 09/12/2006 |
| 7056104 | Compressor unit with an electrical circuit device connected to the main body and an electrical power connector A compressor unit has a compressor main body, an electrical circuit device and a connector. The electrical circuit device is electrically connected to the compressor main body through a cable. The cable has a proximal end and a distal end. One of the compressor main... | 06/06/2006 |
| 7032375 | Secondary air supply system In the disclosed secondary air supply system, an on-off valve (13) is driven by the discharge pressure of an air pump (12). A diaphragm chamber (44) is arranged in the neighborhood of a discharge outlet (54), and a part of the discharge a... | 04/25/2006 |
| 7021902 | Hybrid compressor A hybrid compressor includes a first compression mechanism, which is driven by a first drive source, and a second compression mechanism, which is driven by a second drive source. A first discharge port of the first compression mechanism and a second discharge port o... | 04/04/2006 |
| 6986646 | Electronic trim for a variable delivery pump in a hydraulic system for an engine Electronically controlled variable delivery pumps produce output based upon a control signal generated by an electronic control module. The electronic control module includes programming that acknowledges that each pump may have performance characteristics that devi... | 01/17/2006 |
| 6945062 | Heat pump water heating system including a compressor having a variable clearance volume A heat pump water heater system includes a compressor that has a variable clearance volume that can be selectively controlled to control the mass flow rate of refrigerant from the compressor. Under higher ambient air temperature conditions, the variable volume is in... | 09/20/2005 |
| 6918261 | Electric compressor with a motor, an electric circuit and a protective control means therefor In an electric compressor integrally comprising a compression mechanism, a motor and an electric circuit (inverter) for driving the motor, the electric circuit is protected from thermal damage. When an actual number of revolutions is not more than a fixed num... | 07/19/2005 |
| 6863502 | Variable speed hydraulic pump The invention provides a variable speed hydraulic pump designed to operate at a maximum horsepower throughout its pressure range by adjusting motor speed according to motor load parameters. In particular, the variable speed hydraulic pump includes a hydraulic pump u... | 03/08/2005 |
| 6790018 | Reciprocating compressor having an exhaust valve controlled by an electromagnet Disclosed is an exhaust valve capable of correctly opening/shutting an exhaust port of a cylinder based upon variation of the flux density of an electromagnet. The inventive exhaust valve may comprise a guide connected in parallel to an exhaust port of a cylinder, a... | 09/14/2004 |
| 6685440 | Methods of pressure fluctuation dampening A pressure booster and method for amplifying a water pressure that is supplied by a water facility is provided. The pressure booster is configured to be connected between the water facility and one or more semiconductor substrate cleaning systems. The pre... | 02/03/2004 |
| 6676382 | Sump pump monitoring and control system Motor speed, motor amps, float position and elapsed run time are monitored to determine whether a sump pump is in a normal condition, a jammed condition, an inadequate pumping rate condition, a dry running condition or a stuck float condition. A processor... | 01/13/2004 |
| 6450771 | System and method for controlling rotary screw compressors An electronic control system dynamically varies the output capacity of a compressor by controlling plural valves associated with the compressor to provide pressurized air to a distribution system at an appropriate rate. The control system operates in any ... | 09/17/2002 |
| 6406273 | Pressure fluctuation dampening system A pressure booster and method for amplifying a water pressure that is supplied by a water facility is provided. The pressure booster is configured to be connected between the water facility and one or more semiconductor substrate cleaning systems. The pre... | 06/18/2002 |
| 6357234 | Turbocharger system with turbines having independently controlled variable nozzles A turbocharger system for an internal combustion engine is provided with a plurality of turbochargers. Each turbocharger includes a rotatable shaft; a turbine having turbine wheel carried by the shaft, an inlet and a variable nozzle at the inlet; and a mu... | 03/19/2002 |
| 6257838 | Gas compressor A gas compressor for vehicle braking systems controlled by compressed air can be operated under load or in idle operation. In idle operation, no compressed air is produced. In operation under load, the gas compressor produces compressed air as required by... | 07/10/2001 |
| 6247903 | Pressure fluctuation dampening system A pressure booster and method for amplifying a water pressure that is supplied by water facility is provided. The pressure booster is configured to be connected between he water facility and one or more semiconductor substrate cleaning systems. The pressu... | 06/19/2001 |
| 6244824 | System and methods for controlling rotary screw compressors An electronic control system dynamically varies the output capacity of a compressor by controlling plural valves associated with the compressor to provide pressurized air to a distribution system at an appropriate rate. The control system operates in any ... | 06/12/2001 |
| 6139280 | Electric switch gauge for screw compressors A control apparatus, for measuring pressure in relation to a rotary screw compressor with capacity control means and a prime mover, including a pressure sensor to monitor the prime mover manifold pressure, and a series of relays which when tripped by the ... | 10/31/2000 |
| 6077051 | System and methods for controlling rotary screw compressors An electronic control system dynamically varies the output capacity of a compressor by controlling plural valves associated with the compressor to provide pressurized air to a distribution system at an appropriate rate. The control system operates in any ... | 06/20/2000 |
| 5984644 | Dual output window washer pump for an automotive vehicle A dual outlet washer pump for an automotive vehicle to alternately supply a stream of washer fluid to separate locations has a valve element with a frame portion surrounding a flat, flexible membrane mounted in vertically plainer fashion in a discharge se... | 11/16/1999 |
| 5885062 | Switching valve fluid compressor and heat pump type refrigeration system A switching valve comprises a valve body to which a plurality of fluid passages are connected, a slider having a gas passage capable of selectively connecting two fluid passages, a balance port for letting the gas passage communicate with the outside of t... | 03/23/1999 |
| 5520521 | Hydraulic control device for a viscous fluid pump In a hydraulic control device for a viscous fluid pump with at least one feed cylinder (11) drivable by a hydraulic cylinder (12), the feed chamber (17) of which can be alternately connected via a hydraulically operable inlet valve (18) a hydraulically op... | 05/28/1996 |
| 5452989 | Reverse phase and high discharge temperature protection in a scroll compressor Protective apparatus in a scroll compressor, in the form of a valve assembly, is operative to prevent compressor damage from reverse direction rotation of the scroll compression mechanism or the development of abnormally high discharge gas temperatures. T... | 09/26/1995 |
| 4940391 | Compressor surge detection system In a compressor system, surge detection is provided by sensing the current of the motor driving the compressor and reading oscillations of the current about the average thereof and above and below two opposite threshold levels from such average current an... | 07/10/1990 |
| 4819123 | Compressed air supply system A compressed air supply system including an electric motor for driving an air compressor. An air reservoir connected to an outlet of the air compressor via a cooler. A dryer and a check valve, a pressure sensor coupled to the air reservoir for sensing the... | 04/04/1989 |
| 4809497 | Gas turbine engine/load compressor power plants Single shaft, air breathing auxiliary power units having a single stage centrifugal load compressor driven by a gas turbine engine. The latter has a single stage centrifugal compressor and a single stage radial inflow turbine mounted in back-to-back relat... | 03/07/1989 |
| 4616483 | Diffuser wall control In a motor driven centrifugal compressor having a diffuser containing a movable wall for varying the width of the diffuser passage, control equipment is provided for continually changing the wall position in response to changes in motor current.... | 10/14/1986 |
| 4519748 | Micro-processor control of compression ratio at full load in a helical screw rotary compressor responsive to compressor drive motor current An axial flow helical screw type compressor has a slide valve member and slide stop member mounted end to end beneath the intermeshing rotors such that the slide valve member controls communication between the work chamber defined by the rotors and the ca... | 05/28/1985 |
| 4494382 | Method and apparatus for controlling when to initiate an increase in compressor capacity A method and apparatus for effecting capacity control of a compressor are described. The electric current to the compressor motor driving a variable step compressor is monitored. The subsequent operating current of the compressor is monitored and compared... | 01/22/1985 |
| 4487363 | Bypass control system to maintain a constant air supply pressure in a HVAC duct system A bypass control system and method monitors and controls the amount of air recirculated through a bypass duct from the air supply outlet supplied by a fan and motor from a single zone HVAC unit to the air intake thereof, a stepper motor driven bypass damp... | 12/11/1984 |
| 4412788 | Control system for screw compressor An electronic control system for sequential actuation of a four-way solenoid valve is used to selectively load and unload a slide valve control for a screw compressor. The electronic control system can be responsive to output or refrigerant pressure or ev... | 11/01/1983 |
| 4362472 | Rotary compressor with variable built-in volume ratio A rotary compressor has an outlet port with a variable area for discharging compressed medium from a working chamber to the outlet. The degree of opening of the outlet port is controlled by a regulator which senses the energy supplied to the compressor fo... | 12/07/1982 |
| 4285639 | Electronic control for variable displacement pumps An electronic control system for pressure and flow control of variable displacement pumps consists of a closed loop system of operational amplifiers which provide continuous control of the volume modifying element in the pump. In a variable displacement v... | 08/25/1981 |
| 4249866 | Control system for screw compressor An electronic control system for sequential actuation of a four-way solenoid valve is used to selectively load and unload a slide valve control for a screw compressor. The electronic control system is responsive to output air pressure and pulses a four-wa... | 02/10/1981 |
| 4141539 | Heat treating furnace with load control for fan motor Gas is circulated within the chamber of a heat treating furnace by a fan which is driven by an electric motor. The current drawn by the motor is detected and, when the current exceeds a predetermined magnitude, the density of the gas in the chamber is red... | 02/27/1979 |
