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| Number | Title | Issue Date |
| 8154237 | Sealed electric compressor A sealed electric compressor having a normally-off type pressure switch and a fuse element. The pressure switch is placed in a sealed housing, connected parallel to a main winding of an electric motor, and, when the pressure of refrigerant in the sealed housing is a... | 04/10/2012 |
| 7538509 | Controlling the speed of cooling fans for multiple computer systems based on altitude/fluid density measurements from a centralized sensor The present invention can include an automated method controlling the fan speed of computer system cooling fans with altitude and/or fluid density data from a centralized sensor. Such a method can utilize a centralized sensor to determine the altitude/fluid density ... | 05/26/2009 |
| 7365507 | Power control apparatus for motor A power control apparatus for a motor is disclosed. The power control apparatus includes: a moisture sensor for detecting moisture soaking into a housing including the motor; and a switching unit which is switched by an output signal of the moisture sensor, and swit... | 04/29/2008 |
| 7267531 | Current monitoring system and method for metering peristaltic pump A pump system includes a peristaltic pump having a rotor, a motor and a controller. The motor is configured to drive the peristaltic pump so as to deliver a liquid product from a source to a receiving location. The controller monitors a drive current of the motor so... | 09/11/2007 |
| 7242162 | Apparatus and method for retracting awning An apparatus and method for retracting an awning. A sensor detects an awning acceleration caused by wind impacting the awning, and generates a signal having an amplitude corresponding thereto. When the signal exceeds a certain threshold, the awning is retracted. The... | 07/10/2007 |
| 7102465 | Frequency discrete LC filter bank An inductive (“L”)-capacitive (“C”) filter bank has application for use in a television receiver. The LC filter includes inductors configured in at least one inductive (“L”) bank, and capacitors configured in at least one capacitive (“C”) bank. The i... | 09/05/2006 |
| 7095235 | Monitoring device, electrical machine tool, current supply device, and associated method of operation A monitoring device for an electrical machining tool, in particular for temperature monitoring with an accumulator-driven machine, includes a switch element (12) for separating an electrical consumer (14) from a current supply device (10). For d... | 08/22/2006 |
| 7020921 | Inflating/deflating device in combination with an inflatable mattress having multiple chambers An inflating/deflating device in combination with an inflatable mattress having multiple chambers includes a casing with an inlet and three outlets, a pump received in the inlet to provide inflation/deflation to the chambers of the inflatable mattress and multiple c... | 04/04/2006 |
| 7012394 | Battery-powered air handling system for subsurface aeration The invention is a battery powered source for an air handling system that provides subsurface aeration services when an available power source provides insufficient power. The system comprises a subsurface aeration duct, a motor, an air pump, a storage battery, a ba... | 03/14/2006 |
| 6462494 | Fan with preset characteristic curve A tan having a fan wheel and an electric motor driving it, and a control unit for controlling the motor output as a function of fan-specific parameters. An actual-value signal corresponding to an actual rotational speed of the fan is measured and compared... | 10/08/2002 |
| 6459168 | Power window mechanism for enabling window to be opened in case of submergence of vehicle A submergence backup circuit includes a submergence detection portion having a submergence detection portion for detecting a submergence state. The submergence backup circuit is configured so that a window is controlled to be opened when a manual window o... | 10/01/2002 |
| 6288506 | Submergence detection power-window apparatus A submergence detection power-window apparatus is provided with driving motors for moving electric-power driven opening units to opened and closed states, manual switches for manually opening/closing the electric-power driven opening units, control units ... | 09/11/2001 |
| 6259220 | Constant pressure liquid spraying system controller A spray controller accepts a spray pressure input and a pressure control input, and provides a pressure control output. The controller includes an amplifier and pressure transducer, and its pressure control output is the product of the amplifier's gain an... | 07/10/2001 |
| 6257870 | Gas furnace with variable speed draft inducer A method of controlling a variable speed draft inducer motor and fan in a gas furnace. The method comprises the steps of: detecting a first fault driving the motor to a maximum operating range; detecting a second fault forcing the motor to operate towards... | 07/10/2001 |
| 6118236 | Hand-held, finger or mouth-actuated pneumatic unit for remote proportional control of sewing machine A mouth and/or hand-held finger-actuated remote control unit is disclosed which is operable to permit selective variation of a pneumatic-operated controller (38, 42) having a proportional electrical control output to the electric motor (46) of a sewing ma... | 09/12/2000 |
| 6037732 | Intelligent power management for a variable speed fan A method for controlling the operation of a brushless DC fan for cooling heat generating components of a system is provided. The method includes providing a system temperature signal indicative of a system temperature and providing an intelligent shutdown... | 03/14/2000 |
| 5869941 | Air breaking type machine tool The present invention provides an air bearing type machine tool capable of carrying out a process with a high load for cutting iron or the like and controlling the degree air is used. The air bearing type machine tool includes a main shaft, an air bearing... | 02/09/1999 |
| 5806440 | Method for controlling an induced draft fan for use with gas furnaces A gas fired furnace system (10) has a controller (14) controlling the supply of gas through a gas valve (12) and air for combustion by means of an induced air draft fan (28), ignition of the gas by means of ignitor (22), the delivery of heated air from a ... | 09/15/1998 |
| 5796184 | Method and an apparatus for stopping a motor-driven pressure generating pump of a system for coating workpieces with atomized liquid coating material A method and an apparatus are provided for stopping a motor-driven pressure generating pump of a system for coating workpieces with atomized liquid coating material in case of an empty material reservoir or a leakage in a material supply from a material r... | 08/18/1998 |
| 5680021 | Systems and methods for controlling a draft inducer for a furnace Draft inducer systems and methods for use with a furnace. A motor drives a fan in response to a motor control signal for inducing a draft which is a function of motor speed and motor torque. A processor defines a speed/torque operating curve having a mini... | 10/21/1997 |
| 5241253 | Controller for two-speed fans in VAV systems having inlet vanes A controller for operating a two-speed fan motor at one of two speeds and for selecting the appropriate speed in response to conditions such as a maximum and minimum duct static pressure in a fan unit having moveable inlet guide vanes for controlling air ... | 08/31/1993 |
| 5227706 | Function control device for machines A functional control device (1), designed to be used in primarily textile machines (20), in which the speed must be varied in a simple fashion. Its function involves a conversion of a pressure of a gaseous or liquid medium to a code, which is adapted to t... | 07/13/1993 |
| 5051673 | Patient support structure An improved patient support structure comprising an articulatable frame, a plurality of elongated inflatable sacks, some of the sacks having one or two comfort slots therein, a low pressure compressed air blower and a plurality of pipes and manifolds for ... | 09/24/1991 |
| 4978896 | Method and apparatus for controlling a blower motor in an air handling system Apparatus and method for controlling a motor having a stationary assembly with a plurality of winding stages for carrying motor current and further having a rotatable assembly in driving relation with a blower in an air handling system. The apparatus prov... | 12/18/1990 |
| 4969756 | Motor driven actuator speed control Controlled movement of a motor driven pressure modulator is provided by commanding maximum current to the motor by application of system voltage resulting in the motor current initially rising rapidly to the motor stall current. The motor accelerates at a... | 11/13/1990 |
| 4886320 | Vital pressure regulating system for railroad cars A vital pressure regulating system is constructed using an alternating current system, and the absolute value of an output signal is inversely proportional to the air pressure in the main air reservoir and therefore if some critical circuit component fail... | 12/12/1989 |
| 4884013 | Motor unit for a fluid pump and method of operation An enternal nutrition pump system operates in a cyclical manner with a period between cycles being selected in accordance with the desired fluid delivery rate. Each pump cycle may correspond to a single rotation of the rotor or a fractional rotation of th... | 11/28/1989 |
| 4858436 | Vehicle power brake system A vehicle power brake system, whereby a control pedal may be mounted, in mobile manner, on to a fixed support, for axially displacing, when operated, a rod connected, at one end, to the control pedal, and, at the other end, to a control member on a brake ... | 08/22/1989 |
| 4806833 | System for conditioning air, method of operating such, and circuit A method of operating a system for conditioning air including a variable speed blower for flowing the conditioned air through a contained space having a static pressure therein. In this system, the speed of the blower is set to effect a preselected flow r... | 02/21/1989 |
| 4733151 | Control system for vibration testing apparatus A load support servomechanism circuit controls the armature of a shaker apparatus. The circuit includes a position sensor, peak detectors connected to outputs of the position sensor, an A/D converter connected to outputs of the peak detectors through a sw... | 03/22/1988 |
| 4728869 | Pulsewidth modulated pressure control system for chemical vapor deposition apparatus A low pressure control system for chemical vapor deposition (CVD) apparatus, including a vacuum pressure chamber and an exhaust pump, is provided by a vacuum pump DC motor which is supplied power from a DC motor speed controller coupled to a DC control in... | 03/01/1988 |
| 4698568 | Antiexplosion structure in a working robot An antiexplosion structure in an electric motor drive type working robot includes a sealing structure for sealingly enclosing electric motors for driving the robot and wirings for the motors. Dry air is continuously fed into the sealing structure at a pre... | 10/06/1987 |
| 4686439 | Multiple speed pump electronic control system An electronic control system for a multiple speed fluid pump and motor. A parameter of the motor, the pump, or the fluid which is expelled from the pump is measured by a sensor. When a predetermined value of the parameter is reached, the sensor provides a... | 08/11/1987 |
| 4677357 | Furnace draft control with remote control feature An apparatus for controlling the speed of a combustion blower motor includes first means for generating an output signal representative of a differential pressure. A second means provides a second signal representative of a desired airflow output of the b... | 06/30/1987 |
| 4652801 | Method and device for controlling an apparatus A method of controlling a three state apparatus such as an air compressor comprises a first actuating element e.g. a motor and a second actuating element e.g. a valve, said method including the steps of sensing a variable parameter such as temperature wit... | 03/24/1987 |
| 4622503 | Variable pneumatic output means for use with ophthalmic micro-surgical instruments A variable pneumatic output device for use with ophthmalic micro-surgical instruments including a reversible servo motor which operates in response to instructions from an electronic control circuit. The rotatable drive shaft of the servo motor is operati... | 11/11/1986 |
| 4614479 | Adjustable automatically controlled pneumatic pump device An adjustable automatically controlled pneumatic pump device includes an air pump, an electric motor adapted for being energized by a power source to drive the air pump, an air hose member with an exhaust port at one end, and an other end of the hose memb... | 09/30/1986 |
| 4596514 | Pressure responsive pump drive motor control apparatus having spot switch and alarm lamp A pressure control apparatus, which can be used for a braking force magnification apparatus for a vehicle or a door closing and opening apparatus includes a sensor for sensing a pressure within a vacuum booster. The sensor is of a transfer-contact-type in... | 06/24/1986 |
| 4583029 | Variable speed resistive network for a pneumatic servo assembly of an electro-pneumatic converter A resistive network is used for an electro-pneumatic converter so that the speed of the electro-pneumatic converter can be regulated. The converter includes a reversible DC servo motor having a pair of terminals connected to a pair of lines. The lines are... | 04/15/1986 |
| 4524312 | Control for pumping devices used in vehicles Disclosed is a control for a pumping device in a vehicle application in which, upon throwing a power switch (6), a capacitor (85) is charged and a power transistor (81) is rendered conductive thereby supplying a DC voltage from batteries (5) to a DC motor... | 06/18/1985 |
