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| Number | Title | Issue Date |
| 8066492 | Drive device for the oil pump of a motor vehicle transmission A drive device (2) for the oil pump (6) of a motor vehicle automatic transmission, in which the oil pump (6) on the one hand can be coupled to the drive motor by way of an overrunning clutch (34) and on the other hand is drivingly connect... | 11/29/2011 |
| 7316049 | Apparatus and method for evacuating a liquid One version of the portable liquid-evacuation device may include: a container having a top wall, a bottom wall, a sidewall, a liquid inlet, a liquid outlet, and an air outlet, with the air outlet being connectable to a remote vacuum source; a pump positioned in the ... | 01/08/2008 |
| 7226273 | Method of generating compressed air, and compressor arrangement for implementing the method Method and compressor arrangement for generating compressed air, particularly for commercial vehicles, which is generated by way of a compressor unit (3) driven by an internal-combustion engine (1) from the ambient air according to a control unit (1... | 06/05/2007 |
| 6908289 | Fuel pump with automatic shutoff A pressure sensor subsystem measures the pressure within a fuel pump and outputs an under-pressure signal when the measured pressure is below a predetermined threshold pressure value. A temperature sensor subsystem measures the temperature within the fuel pump and o... | 06/21/2005 |
| 6745767 | Respiration system with an electrically driven rotary compressor A respiration system is provided with an electrically driven rotary compressor as a gas delivery unit. The system makes a low-noise mounting of the gas delivery wheel possible. The gas delivery wheel can also be washed and sterilized and ensures a reliable separatio... | 06/08/2004 |
| 6597141 | Position sensing in brushless motor systems A method of calculating the position of the rotor of a motor (1) in for example an electrical power assisted steering assembly is disclosed. The method comprises the steps of measuring the output shaft (2) (i.e. steering column) position, and scaling the ... | 07/22/2003 |
| 6592620 | Power system for an implantable heart pump A power system for an implantable heart pump is provided. The system includes two batteries, a microprocessor controller, two motor drivers, a multiplexer, two stators and a TET coil. During normal operation, only one battery and one motor driver are in u... | 07/15/2003 |
| 6540148 | Method and apparatus for sequencing multistage systems of known relative capacities Disclosed is a method and apparatus for controlling multistage systems where the relative capacities (process gains) of each stage are known. The method uses a split-range control concept in order to control multiple stages with a single feedback controll... | 04/01/2003 |
| 6471486 | Compressor system and method and control for same An electronic control system is disclosed to control and to prevent damage to a standalone or a network of oil free, two stage compressor packages. The electronic control system uses pressure and temperature sensors to detect actual shutdown conditions or... | 10/29/2002 |
| 6390780 | Pump and controller system and method A liquid pump and controller with separate pump activation and deactivation mechanisms that are both closed detector devices is provided. The pump activation mechanism includes a float device that activates a pump motor when water within a housing of the ... | 05/21/2002 |
| 6318965 | Intelligent internal fan controller An intelligent fan system includes a microcontroller having memory and an interface which provides a connection to a host computer system. The host computer system dynamically provides a plurality of controlled instructions to the microcontroller which ar... | 11/20/2001 |
| 6312225 | Gear pump having a multishaft drive and method of operating same A gear pump having two meshing gears which are each assigned to a shaft and which are each driven by a driving unit. The driving units are controllable by a control unit such that the shafts rotate at a definable angular velocity. The control units having... | 11/06/2001 |
| 6257833 | Redundant, dedicated variable speed drive system A redundant, modular pump system includes a plurality of substantially identical pump modules. Each module includes constant speed drive circuitry, variable speed drive circuitry and a pump. Expansion is accomplished by adding modules. Reliability is enha... | 07/10/2001 |
| 6136184 | Liquid chemical delivery system A liquid chemical delivery system (20) has a pump (27) driven by an electric motor (28) to draw a liquid from a bottle (21) and dispenses the liquid into a septic system (12). Separate independent controls (36,37) connect the electric motor (28) with a so... | 10/24/2000 |
| 6102665 | Compressor system and method and control for same An electronic control system is disclosed to control and to prevent damage to a standalone or a network of oil free, two stage compressor packages. The electronic control system uses pressure and temperature sensors to detect actual shutdown conditions or... | 08/15/2000 |
| 6065946 | Integrated controller pump A d.c. controller pump includes electronic control mechanisms that permit regulated control within a fluid flow system. A pump head is coupled to a housing allowing the fluid to infiltrate the region surrounding a permanent magnet rotor. Stator windings a... | 05/23/2000 |
| 5947700 | Fluid vacuum safety device for fluid transfer systems in swimming pools A safety device for use in a fluid transfer system for a swimming pool or similiar application, having a pump which draws water from a reservoir through one or more intake lines each extending from an open end at the reservoir to the pump intake. The devi... | 09/07/1999 |
| 5791880 | Infusion pump having power-saving modes An infusion apparatus includes a pump powered by a source of battery power and capable of operating in a plurality of infusion modes and operating in a power savings mode. The infusion apparatus further includes sensors which sense various conditions of t... | 08/11/1998 |
| 5765995 | Automated engine-powered pump control system An automated control system for an engine-powered pump system. The pump system includes an engine with a battery and a pump. A control unit includes: a display, engine sensors, pump sensors, fluid level sensors, engine controllers, pump controllers, strob... | 06/16/1998 |
| 5658131 | Electric pump control system An electric pump is turned ON and OFF by a main drive circuit including a negative pressure sensor for detecting a negative pressure in an accumulator, a first relay and a control device, and also turned ON and OFF by a back-up drive circuit including a n... | 08/19/1997 |
| 5564904 | Method of evacuating a single fluid in an enclosure containing a mixture of fluid A sensor can detect the difference in potential between a probe and the fluid into which it is immersed, and a signal generated by the probe representing this difference in potential is used to activate an oscillator circuit. By varying the conditions at ... | 10/15/1996 |
| 5474428 | Oil pump driving device for transmission An oil pump driving device drives an oil pump combined with a transmission coupled to an engine for supplying working oil to lubricate the transmission and enable the transmission to make gear shifts. The transmission includes a first power transmitting m... | 12/12/1995 |
| 5393201 | Synchronous rotating apparatus for rotating a plurality of shafts A synchronous rotating apparatus synchronously rotates a plurality of rotary shafts independently driven by corresponding driving devices. The apparatus includes: a mechanical regulating member, arranged on the shafts, for maintaining relative rotating po... | 02/28/1995 |
| 5348448 | Fluid rotating apparatus with plural drive motor synchronization system A fluid rotating apparatus includes non-circular rotors accommodated in a housing, rotary shafts having the rotors, bearings for rotatably supporting the shafts, a fluid suction and a fluid discharge ports formed in the housing, a positive displacement pu... | 09/20/1994 |
| 5316444 | Pump control and method of pumping A pump control controls the rate at which liquid is pumped through a tube. The pump has a variable speed shaft with a roller thereon engaged with the tube between the tube inlet the tube outlet for pumping liquid from a supply toward the tube outlet when ... | 05/31/1994 |
| 4977363 | Overheat preventing system of A.C. motor In the operation of an A.C. motor by switching the number of poles of the motor or the power sources of different frequencies, switching operating circuit is constructed to automatically switch so that the motor does not overheat by the above-described sw... | 12/11/1990 |
| 4964533 | Pumping system To control with precision and repeatability the amount of fluid dispensed or aspirated by a pumping system, a volume disk rotates with the output shaft of a DC motor that drives a reciprocating dispensing pump. A sensor detects indicia on the disk and pro... | 10/23/1990 |
| 4801376 | Cleaner for swimming pools and the like A cleaner has in a tank a vacuum pump protected by a float valve above the maximum possible water level and a submersible pump at the bottom and both of these in the tank produce a vacuum for the suction of water against the vacuum, the submersible pump m... | 01/31/1989 |
| 4620835 | Pump protection system To protect the pump of a whirlpool bath against running dry and against blockage at the inlet, a pressure (or flow) sensor 14 senses pump pressure and generates a signal to keep a switch S2 in the pump motor electrical supply circuit closed. If the pressu... | 11/04/1986 |
| 4589444 | Electro-hydraulic actuator for turbine valves The electro-hydraulic actuator for turbine valves essentially includes a control valve, a rapid action stop valve, a hydraulic supply and an oil supply unit. In order to create a hydraulic actuator for turbine valves which, on the one hand, satisfies the ... | 05/20/1986 |
| 4534706 | Self-compensating oscillatory pump control A microprocessor based control system for establishing the optimum points of motor turn on and turn off for an oscillatory pumping system. The power to the motor is disabled at a point calculated to return the maximum stored mechanical energy to the syste... | 08/13/1985 |
| 4505333 | Methods of and means for low volume wellhead compression hydrocarbon _gas Methods and means for economically compressing low volume, low pressure natural gas at the wellhead are provided. The means include an electrically operated, self starting compressor responsive to a low pressure inlet shut-off switch and a high pressure d... | 03/19/1985 |
| 4496285 | Reciprocating drive and velocity control for long stroke well pumping unit A yo-yo variety reciprocating drive for long stroke, well pumping units, which employ a flexible element as the operative link between the winding drum and the polish rod of the well pump. Reversal from an upstroke to a downstroke is cushioned by mechanis... | 01/29/1985 |
| 4474013 | Overspeed anticipation circuit for steam turbine speed control An overspeed detection circuit for producing an overspeed trip signal for shutting off a supply of motive fluid to a prime mover upon the prime mover exceeding an overspeed trip limit includes a differentiating circuit effective to differentiate a speed s... | 10/02/1984 |
| 4468171 | Method of controlling air flow rate of fan The air flow rate of a fan driven by a motor controlled by an adjustable speed control equipment is automatically controlled by stopping the adjustable speed control equipment in response to a fault signal therefrom during operation with an inlet vane ins... | 08/28/1984 |
| 4255089 | Method of controlling series fans driving a variable load Two series connected fans driving a variable throat venturi are controlled by a single flow control feedback loop yet are decoupled by modifying the common flow control signal by separate but complementary piecewise linear characterizations of the flow ch... | 03/10/1981 |
| 4251026 | Attic ventilation control system A control system for use with an attic ventilation fan operates to reduce heat buildup during the summer months and also to prevent frost buildup during the winter months by eliminating the cold, moisture-laden, air from the attic. A summer control unit i... | 02/17/1981 |
| 4195968 | Liquid level control A liquid level control for the operation of a sump pump or the like intermittently removing liquid from a sump or pit. The control starts the pump when the liquid level reaches a preset high level and maintains the pumping until the liquid reaches a prese... | 04/01/1980 |
| 4180374 | Well pump protection system Disclosed herein is a protection system for a well pump in which a normal pressure switch is provided in series between this switch and the submerged motor and pump with a low pressure switch which has connected in parallel thereto a timing device which c... | 12/25/1979 |
| 4171186 | Submerged pump control A solenoid actuated mechanical relay is encapsulated in electrical insulating resin in a housing on a tubular column extending upward from a submerged pump unit in the bottom of a tank, to energize the pump motor. Float switches mounted on said housing ar... | 10/16/1979 |
