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| Number | Title | Issue Date |
| 7061202 | Automobile servomotor controller An automobile servomotor controller includes a master control unit having a master control circuit for transmitting a designation signal and a slave unit having a motor and a control circuit which controls driving of a motor by outputting an operation signal to a dr... | 06/13/2006 |
| 6915171 | Automatic procedure for locating actuator addresses on a bus system An automatic procedure for locating actuator addresses on a bus system is revealed. The actuators may be identical except for their physical position, and thus their function and address on a bus system that controls and powers the actuators. Because their functions... | 07/05/2005 |
| 6679084 | Expansion device with shutoff mechanism An expansion device that is able to perform the functions of refrigerant expansion, flow control and shut-off. A cage extends from the ends of a body and supports a screen cover. An orifice tube extends through the body and a conical shaped valve seat for... | 01/20/2004 |
| 6672091 | Atomization device for a refrigerant An expansion device for refrigeration system having a piston which reciprocates to either open or close ports to increase or decrease the volume of atomized refrigerant liquid received from the condenser. Atomization may be enhanced by use of auxiliary ul... | 01/06/2004 |
| 6205799 | Spray cooling system A spray cooling system for semiconductor devices. An ink-jet type spray device sprays droplets of a cooling fluid onto the semiconductor devices. The devices vaporize the liquid, which gets passed through a roil bond panel, or other heat exchanger, and is... | 03/27/2001 |
| 6053416 | Automatic hydronic zone valve and electric controls therefor An automatic and improved electrical control for an automatic hydronic zone valve including a switching device for opening and closing solenoid valves based on adjustable temperature settings. Specifically, the preferred system involves a solenoid-control... | 04/25/2000 |
| 6006527 | Refrigeration system A refrigeration system having a plurality of cooled surfaces, each of which has a thermostatically controlled refrigerant supply valve. The valves are pulse-width modulated, each having the same period and being so controlled so they have staggered openin... | 12/28/1999 |
| 5950441 | Method and apparatus for controlling an evaporative gas conditioning system Method and apparatus for controlling an evaporative gas conditioning system utilizes a controller for controlling the rate at which liquid is introduced into a conditioning chamber, thereby closely controlling the rate at which temperature within the cond... | 09/14/1999 |
| 5735456 | Universal retrofit valve actuator and system An actuator has a drive gear set to interact with a driven lug to rotate the lug and whatever the lug is fixed to. The actuator must be separately anchored to interact with the lug. The drive gear and the lug have cams that are spaced apart, so that when ... | 04/07/1998 |
| 5460349 | Expansion valve control element for air conditioning system An expansion valve (10) for heat transfer systems such as an air conditioning system, includes a control element (20) for controlling the flow rate of working fluid through the valve. The control element has a stem member (28) and movable member (42) mova... | 10/24/1995 |
| 5435145 | Refrigerant flow rate control based on liquid level in simple vapor compression refrigeration cycles Pulse width modulation is used to control the flow rate through a solenoid expansion valve in a refrigeration system using a simple vapor compression cycle. The refrigeration cycle includes a phase separator which receives two phase refrigerant from the c... | 07/25/1995 |
| 5396780 | Refrigeration system and method of controlling a refrigeration system A refrigeration system having a compressor, a condenser and an evaporator between the condenser and the compressor. A controllable valve unit at the input side of the evaporator has degrees of opening for controlling fluid flow through said evaporator. A ... | 03/14/1995 |
| 5077983 | Method and apparatus for improving efficiency of a pulsed expansion valve heat pump During start up of a heat pump compressor that is controlled by a pulsed expansion valve system the discharge temperature sensor control of the pulse system is interrupted and a predetermined constant pulse is applied to the expansion valve increasing cap... | 01/07/1992 |
| 4899549 | Transport refrigeration system with improved temperature and humidity control A transport refrigeration system operable in cooling and heating cycles to maintain the temperature of a fresh load in a conditioned space extremely close to a predetermined set point temperature, with the cooling cycle primarily controlling the load temp... | 02/13/1990 |
| 4787213 | Regulating mechanism for the refrigerant flow to the evaporator or refrigerating systems or heat pumps and expansion valves arranged in the refrigerant flow An expansion valve (8), which is arranged between the condenser (2) and the evaporator (3) in the pump medium circulation system of the heat pump and is continuously controllable, is regulated as a function of set values by means of a computer (10), in pa... | 11/29/1988 |
| 4714193 | Selector valve device A selector valve device for controlling the opening and closing of a fluid passageway in response to both the input current signal and the ambient temperature, especially used for a carbureter outer vent controller of vehicle engines. The valve device is ... | 12/22/1987 |
| 4608208 | Control valve device A control valve device for use in a carburetor outer vent control system of an automotive internal combustion engine. The device includes a solenoid coil generating a magnetic force and a spring made of a shape memory alloy so that the device may control ... | 08/26/1986 |
| 4548047 | Expansion valve An expansion valve wherein a plunger slidably fitted in a hollow member for sliding movement and opening and closing valve ports formed in the hollow member is driven by an electromagnetic force, and two chambers defined between opposite ends of the plung... | 10/22/1985 |
| 4434933 | Gas flow rate control system A gas flow rate control system designed to control the gas flow rate by continuously controlling the opening of an electromagnetic valve, wherein the magnetic hysteresis of a plunger and a yoke which are magnetic material forming the magnetic circuit is r... | 03/06/1984 |
| 4425767 | Refrigeration control system for modulating electrically-operated expansion valves A refrigeration control system for modulating an electrically-operated expansion valve in which a modulating, electrically-operated expansion valve is connected to the evaporator inlet, and first and second condition-responsive electrical sensors are posi... | 01/17/1984 |
| 4366678 | Temperature control apparatus for refrigerating machine A temperature control apparatus for use in a refrigerating machine, wherein an a.c. control element and the solenoid coil of a holding type solenoid are connected in series in an a.c. power circuit, the holding type solenoid serving to actuate a damper fo... | 01/04/1983 |
| 4362027 | Refrigeration control system for modulating electrically-operated expansion valves A refrigeration control system for modulating an electrically-operated expansion valve in which a modulating, electrically-operated expansion valve is connected to the evaporator inlet, and first and second condition-responsive electrical sensors are posi... | 12/07/1982 |
| 4240580 | Temperature dependent electronic control switch A temperature dependent electronic control switch, especially suited for an automatic temperature control in vehicles, including one or more NTC resistors as sensors in a bridge circuit, an amplifier, to amplify the signals from the sensors, a solenoid fo... | 12/23/1980 |
| 4193269 | Apparatus for supplying a cooling liquid to a condenser of a refrigeration unit An apparatus for supplying a cooling liquid to a condenser of a refrigeration unit. The apparatus comprises a conduit for passing the cooling liquid from a source thereof into thermal communication with the condenser, and a valve to regulate the flow of l... | 03/18/1980 |
| 3973618 | Electronic capacity control or direct expansion refrigeration of air conditioning systems The invention relates to the air conditioning of a storage compartment and is especially significant for a transport system. Air is circulated between an air tempering zone and the storage compartment, said air tempering zone having air cooling means and ... | 08/10/1976 |
