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| Number | Title | Issue Date |
| 7959414 | Control system and method for protection against breakage of lubricanting-oil film in compressor bearings The present invention relates to a control system for protection against breakage of the lubricating-oil film in the bearings of hermetic compressors, as well as to a control method that has the objective of guaranteeing that a variable-capacity compressor should be... | 06/14/2011 |
| 7547195 | Scroll compressor with high side to low side oil bleed valve A scroll compressor is provided with an oil bleed valve that selectively communicates a discharge pressure chamber to a suction pressure chamber. The oil bleed valve controls flow of hot oil through a passage and onto a safety shutoff switch for an electric motor. | 06/16/2009 |
| 7396213 | Oil utilized as motor protector trip for scroll compressor A scroll compressor has lubricant flow which communicates lubricant onto a motor protector when adverse conditions are present causing the motor protector to trip the motor and stop further rotation. The lubricant is returned to an oil sump through a normal return p... | 07/08/2008 |
| 7351043 | Horizontal compressor end cap A substantially horizontal compressor including a housing having a main body portion with an open end. An end cap is secured to the main body portion with the end cap being provided with a plurality of apertures. The hermetic terminal body of the compressor is seala... | 04/01/2008 |
| 7331766 | Compressor In a compressor for gaseous media, in particular, refrigerants, comprising a housing, a drive shaft mounted in the housing, at least one compressor unit arranged in the housing and driven by the drive shaft, and an oil lubricating device for supplying bearing areas ... | 02/19/2008 |
| 7320225 | Refrigeration system and method of operating the same A refrigeration system including a compressor, condenser, valve, and refrigeration branch, all of which is in fluid communication. The refrigeration branch includes an evaporator coil. The refrigeration system further includes a case adapted to be cooled by the evap... | 01/22/2008 |
| 7318510 | Liquid friction clutch A drive for a cooling fan at motor vehicles including a main cooling circuit and at least one secondary cooling circuit using a fluid friction clutch including a control element for the drive of the cooling fan is described. In case of a plurality of cooling ... | 01/15/2008 |
| 7316541 | Engine-powered air compressor with a controller for low oil condition An air compressor with an internal combustion engine having an engine oil sump, a compressor driven by the internal combustion engine and having a compressor oil sump, and a controller coupled to the internal combustion engine. The controller is configured to halt t... | 01/08/2008 |
| 7290990 | Short reverse rotation of compressor at startup In a method of operating a scroll or screw compressor at startup, the compressor is rotated in reverse for a brief period of time. The compressor is of a type that does not compress liquid when rotated in reverse. The purpose is to boil off the liquid refrigerant fr... | 11/06/2007 |
| 7281912 | Compressor having a safety device being built in at least one of the screw plugs of the oil-separator A compressor is provided with an oil separator for separating part of the lubricating oil contained in the compressed refrigerant, path arrangement for connecting a separation chamber of the separator and a delivery port of the compressed refrigerant, the path arran... | 10/16/2007 |
| 7265463 | Rotary electric apparatus with high cooling performance A rotary electric apparatus, such as on-vehicle three-phase AC generator (i.e., alternator) comprises a main rotary unit, a semiconductor power converter, and an air cooling mechanism. The main rotary unit is provided with a rotor and an armature disposed as a stato... | 09/04/2007 |
| 7222005 | Abnormal oil pressure reduction determination device for vehicle transmission An abnormal oil pressure reduction determining device has an oil pressure sensor which detects a real oil pressure, a sensor which detects a vehicle running state, and a controller which sets an oil pressure command value for an oil pressure control mechanism. The c... | 05/22/2007 |
| 7143016 | System and method for dynamic multi-objective optimization of pumping system operation and diagnostics Control systems and methodologies are disclosed for controlling a process having one or more motorized pumps and an associated motor drives, which comprise selecting a desired operating point within an allowable range of operation about a process setpoint according ... | 11/28/2006 |
| 7137267 | Apparatus for variable displacement type compressor An apparatus for controlling a variable displacement compressor has an information detector and a controller. The information detector detects information about the thermal load on the refrigeration circuit. The controller determines a target value that reflects the... | 11/21/2006 |
| 7088062 | Electronic variable speed control of dual motor configuration A dual motor configuration 10 includes a primary brushless motor 18 electronically controlled to be driven at various speeds throughout a range of motor speeds. A secondary brush motor 24 electronically controlled be driven at various speeds thr... | 08/08/2006 |
| 7069735 | Apparatus for variable displacement type compressor An apparatus for controlling a variable displacement compressor has an information detector and a controller. The information detector detects information about the thermal load on the refrigeration circuit. The controller determines a target value that reflects the... | 07/04/2006 |
| 7059839 | Horizontal compressor end cap with a terminal, a visually transparent member, and a heater well mounted on the end cap projection A substantially horizontal compressor including a housing having a main body portion with an open end. An end cap is secured to the main body portion with the end cap being provided with a plurality of apertures. The hermetic terminal body of the compressor is seala... | 06/13/2006 |
| 7048511 | Device for prevention of backward operation of scroll compressors A method and apparatus which provides a pressure sensor and/or temperature sensor connected to the low pressure side of a refrigeration system, or the discharge line of a scroll compressor. When the scroll compressor rotates backward, the change of pressure or tempe... | 05/23/2006 |
| 6933687 | Dual motor configuration with primary brushless motor and secondary integrated speed control motor A dual motor configuration 10 is provided for driving two fans for moving air to cool an engine. The dual motor configuration includes a primary brushless motor 18 constructed and arranged to be electronically controlled to drive a first fan 16 ... | 08/23/2005 |
| 6886354 | Compressor protection from liquid hazards Two liquid levels are sensed in the oil sump of a compressor to determine if sufficient oil and excess refrigerant are present prior to starting the compressor and appropriate steps taken, if necessary. At start-up, and during operation, the presence or flow of liqu... | 05/03/2005 |
| 6648607 | Scroll compressor with oil reservoir associated with motor protector A scroll compressor has lubricant flow which communicates lubricant onto a motor protector causing the motor protector to trip the motor and stop further rotation when a predetermined lubricant temperature is reached. The motor protector is surrounded by ... | 11/18/2003 |
| 6547528 | Control system for fire pump A system for remote-controlling a fire pump with a simple wiring construction is provided, being capable of conducting various kinds of control and display. The fire pump control system has an engine, a fire pump, an internal control apparatus, at least o... | 04/15/2003 |
| 6431843 | Method of ensuring optimum viscosity to compressor bearing system A method of ensuring adequate oil thickness for the bearings in a sealed compressor includes the step of monitoring the viscosity of a lubricant for the bearings. If the monitored viscosity drops below a minimum, then some control is effected to reduce th... | 08/13/2002 |
| 6422822 | Pressurized seal for submersible pumps A submersible pump employs a sealed, oil-filled chamber with a moisture-sensing probe to detect the presence of any pumpage, such as water, which has leaked into the chamber. If contamination is detected, the pump may be shut down for repairs before it fa... | 07/23/2002 |
| 6394758 | Apparatus and method of controlling air compressor An apparatus and method of controlling air compressors is disclosed. In this invention, an air compressor is started to supply compressed air to an air tank. A temperature sensor senses the lubrication oil temperature of the compressor, and outputs a temp... | 05/28/2002 |
| 6280146 | Sealed compressor using hot oil to actuate protector switch A unique protection circuit for a sealed compressor incorporates oil structure which directs a heated oil onto a motor protection circuit. The motor protection circuit is of the type which shuts down operation of an electric motor when a predetermined tem... | 08/28/2001 |
| 6276901 | Combination sight glass and sump oil level sensor for a hermetic compressor A combination sight glass and optical sensor is provided in the housing of a hermetic compressor to provide effective visual inspection in addition to automatic sensing of the level of oil in an oil sump. A sight glass fitting is provided in the housing a... | 08/21/2001 |
| 6125642 | Oil level control system This oil level control device is for a refrigeration system, the control device being attached between the compressor and the oil supply. The control device includes a housing having an inlet communicating with the oil supply and an outlet communicating w... | 10/03/2000 |
| 6086331 | Safety pumping system for hazardous environments using pressurized gas in a plurality of chambers A safety pumping system including a pump (19) and an electric motor (15) is adapted to be immersed in a fluid (11) contained in a tank (10). The electric motor and the pump are interconnected by a driving shaft (23). The electric motor is enclosed in a mo... | 07/11/2000 |
| 6068447 | Semi-automatic compressor controller and method of controlling a compressor The present invention provides a controller for an air compressor system. The air compressor system includes an air compressor, control unloaders on the air compressor to prevent the air compressor from compressing gases when signaled to unload, an electr... | 05/30/2000 |
| 6017192 | System and method for controlling screw compressors A compressor controller provides integrated monitoring, control, and alarm capabilities. The compressor controller receives a run signal from a rack controller. Upon receipt of the run signal, the compressor controller monitors startup conditions to deter... | 01/25/2000 |
| 6017205 | Scroll compressor A scroll-type compressor is disclosed which includes both a high pressure lubricant sump and a low pressure lubricant sump. Lubricant from the low pressure lubricant sump is supplied to the various bearing, thrust surfaces and other moving parts to lubric... | 01/25/2000 |
| 5957663 | Dedicated alternator cooling system for automotive vehicles A cooling system for an automotive vehicle of the type having a radiator through which a coolant fluid flows includes a fan motor for driving a fan which moves air through the radiator; an alternator for supplying an output voltage to the fan motor; and a... | 09/28/1999 |
| 5765994 | Low oil detector with automatic reset An optical liquid level sensor for distinguishing between the presence of oil and vapor within a compressor crankcase. The sensor has a light transmitting window positioned to interface the crankcase interior and a planar side facing the crankcase exterio... | 06/16/1998 |
| 5603608 | Methods and apparatus for monitoring progressive cavity pumps A system is providing for simultaneously addressing the problems of deadhead pumping, dry pumping, and seal failure in progressive cavity pumps. The system uses a hydraulic channel (23, 25, 26) which runs from the pump's rotor (5) to the pump's hydraulic ... | 02/18/1997 |
| 5267843 | Internal gas compressor and internal combustion engine An integral gas compressor and internal combustion engine. The compressor is built by converting a portion of an internal combustion engine to a compressor by removing the original engine head and valve train and replacing these with a compressor head ass... | 12/07/1993 |
| 5145322 | Pump bearing overheating detection device and method A deep well water pump system has a temperature probe (17) in the air space above the top bearing (12), preferably in the oil inlet chamber (26), and provides means for signalling abnormal temperatures to warning and system shutdown means. A method of det... | 09/08/1992 |
| 5067326 | Method and apparatus for controlling capacity of a multiple-stage cooling system A refrigeration system is provided with a compressor whose speed is varied to provide load control. In order to prevent compressor damage is lubricating oil pressure sensing control is provided which generates a compressor speed increase signal whenever t... | 11/26/1991 |
| 5062277 | Combined oil heater and level sensor A thermally protected heater element is located in an oil sump such that it is normally located beneath the surface of the oil whereby the oil is heated and acts as a heat sink relative to the heater element. If the oil level drops below the heater elemen... | 11/05/1991 |
| 5052897 | Compressor and method of detecting quantity of mixture of coolant and lubricant in the compressor A compressor has a motor and a compressor mechanism connected to the motor. The motor has a coil and is lubricated with lubricant. The compressor mechanism sucks and compresses low-pressure coolant and discharges high-pressure coolant. The compressor comp... | 10/01/1991 |
