Did You Know...
...that one person who claimed to be the inventor of the television is Russian emigre Vladimir Zworykin? In 1929 David Sarnoff, founder of RCA, asked Zworykin what it would take to develop TV for commercial use. He said: a year and a half and $100,000. In reality, it took 20 years and $50 million! Before his death in 1982 at the age of 92, Zworykin said of his invention: "The technique is wonderful. It is beyond my expectations. But the programs! I would never let my children even come close to this thing."
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| Number | Title | Issue Date |
| 8007263 | Water-lubricated compressor A water-lubricated compressor has a discharge on-off valve in a discharge channel located between a discharge port of a compressor body and a water separating/recovering unit. A water circulation on-off valve is disposed in a water circulation channel located betwee... | 08/30/2011 |
| 7607905 | Fluid compressing system having oil-releasing port being between oil chamber and oil-adjusting tank for returning oil A fluid compressing system includes: a rotary compressor including a housing defining an oil chamber and an oil-releasing port in fluid communication with the oil chamber; a discharging pipeline connected to the housing for passage of a high pressurized fluid theret... | 10/27/2009 |
| 7553142 | Lubrication system for compressor A compressor of this invention includes a flow passage supplying lubricant to an outlet bearing and to an inlet bearing. An orifice is disposed within the flow passages for controlling lubricant flow to the bearing assemblies. A choke orifice is disposed in series w... | 06/30/2009 |
| 7347301 | Lubricant supply system and operating method of multisystem lubrication screw compressor An oil refrigeration screw compressor being applied to a refrigeration system etc., in which the problem of strength reduction of a bearing material under high temperatures and that of lifetime reduction of the bearing material due to viscosity lowering of lubricant... | 03/25/2008 |
| 7338552 | Process and device for separating oil and volatile organic components from pressurized gases of a compression system A process and device for separating oil and volatile organic components from pressurized gases of a compression system in which, before oxidation-catalytic separation, a physical separation is performed to protect the oxidation-catalytic separator against a large am... | 03/04/2008 |
| 7293970 | Two-stage rotary compressor An oil supply hole connecting an oil reservoir to a suction port formed in a lower supporting member of a two-stage rotary compressor is disclosed. The suction port is provided in the lower supporting member attached to the lower side of a high stage side rotary com... | 11/13/2007 |
| 7234924 | Rotary combustion engine with device for conveying lubricating oil A rotary combustion engine with one or more working units, which include a peripheral housing, a front housing plate, a rear housing plate on the output side, an eccentric shaft, and a piston, where the eccentric shaft includes an eccentric, and front and rear seali... | 06/26/2007 |
| 7232295 | Tempering method for a screw-type vacuum pump A screw-type vacuum pump (1) is tempered such that characteristics of the pump are not substantially altered when the pump is subjected to thermal stress. In order to achieve said aim, cooling is adjusted according to an operating state of the screw-type vacu... | 06/19/2007 |
| 7231783 | Oil control system for a refrigeration system A refrigeration system includes a compressor having a compressor housing and operable to compress a flow of refrigerant. A pump is operable to provide a flow of oil to the compressor. A portion of the oil mixes with the flow of refrigerant and the remainder of the o... | 06/19/2007 |
| 7214036 | Screw type vacuum pump A screw vacuum pump which allows reduced power, lower inside gas temperature, and reduced discharging time. The pump has a pair of screw rotors rotatively engaged with each other in a pump casing to discharge a gas along a longitudinal direction of the pump. Each ro... | 05/08/2007 |
| 7204678 | Method for controlling the oil recirculation in an oil-injected screw-type compressor and compressor using this method The invention relates to a method for controlling the oil recirculation in an oil-injected screw-type compressor which, between the oil separator (10) and the compressor element (1), comprises an oil recirculation conduit (17) in which an oil co... | 04/17/2007 |
| 7186099 | Inclined scroll machine having a special oil sump A scroll-type compressor is provided in an inclined or inverted position with an oil sump disposed adjacent to a gas inlet of the scroll wraps to allow droplets of oil to be entrained in the gas being compressed so that the oil droplets in the gas can cool the scrol... | 03/06/2007 |
| 7144235 | Bearing and screw compressor A bearing comprising a resin layer, a backing strip and an intermediate layer which bonds the resin layer and the backing strip to each other is disclosed. The bearing undergoes a force from the resin layer side. A corrosion preventing layer is formed on each side f... | 12/05/2006 |
| 7114913 | Lubricant-cooled gas compressor In a lubricant-cooled gas compressor (10) the temperature of separated lubricant returned to the air-side (11) is monitored by a thermostatically controlled restrictor valve (22) which minimises the flow of returned lubricant when temperature is... | 10/03/2006 |
| 7094037 | Oil-cooled compressor An oil-cooled screw compressor which can maintain the discharge temperature of discharge gas at an appropriate level is provided. The oil-cooled screw compressor comprises a compressor body, an oil separation/recovery unit disposed in a discharge path extending from... | 08/22/2006 |
| 7077635 | Pump comprising a water supply A pump (12) for generating pressure and/or negative pressure comprises a pump chamber having a high-pressure port (16) and a low-pressure port (14), and two at least two-blade rotors which are mounted in the pump chamber on two parallel shafts o... | 07/18/2006 |
| 7070399 | Variable displacement pump with a suction area groove for pushing out rotor vanes A variable displacement pump has a cam ring, a rotor, a plurality of vanes, a pressure plate and a rear body. The cam ring is accommodated within a pump body. The rotor rotates within the cam ring. The plurality of vanes are inserted retractably into slits formed at... | 07/04/2006 |
| 7059837 | Variable speed oil-injected screw compressors The invention relates to the use of variable speed control of the cooling fan on a variable speed oil-injected screw compressor. A screw compressor (11) comprises at least one stage of compression, each with a pair of rotors, variable speed compressor drive m... | 06/13/2006 |
| 7052249 | Air/oil separating tank—thermostatic valve—minimum pressure valve—oil cooling radiator—compressed air cooling radiator group A group is provided for a compressed air distribution unit of the type including an intake regulator, an oil bath-screw type compressor, an air/oil separating tank, a minimum pressure valve, an air cooling radiator, a pressurized air collection tank, a thermostatic ... | 05/30/2006 |
| 6935569 | Oil cooler bypass valve A valve actuating mechanism for a transmission/engine fluid cooler bypass valve of the type in which a responsive element expands to urge a valve member against a valve seat and thereby causes transmission fluid to flow through an oil fluid cooler. A cast valve hous... | 08/30/2005 |
| 6866490 | Water-injected screw compressor The invention relates to a water-injected screw compressor which comprises a compressor element (1) with an interior space (3), a suction conduit (7) which connects to an inlet part (6), situated at the top of this interior space (3 | 03/15/2005 |
| 6808836 | Air supply system for fuel cell An air supply system for a fuel cell is disclosed, in which a compression chamber (17) of an air supply mechanism (GS) is adapted to supply air to a fuel cell (FC). A liquefaction unit (14) acting as a water supply mechanism (WS) supplies water to the ... | 10/26/2004 |
| 6719546 | Arrangement for controlling the flow of a coolant fluid in a compressor The invention comprises an arrangement for controlling the flow of a coolant fluid in a compressor, in particular in a rotary compressor, in which a coolant-fluid inlet for coolant fluid discharged from the compressor and a coolant-fluid outlet for returning the coo... | 04/13/2004 |
| 6695602 | Bacterial growth inhibition in a circulation system comprising a compressor The present invention relates to a compressor (1) that has an associated coolant circulation system (1, 4, 6, 8, 11, 13), and also to a method of maintaining a low bacteria content in the coolant circulating system (1, 4, 6, 8, 11, 13), in which method ga... | 02/24/2004 |
| 6409489 | Compressor installation with water-injected compressor element The invention concerns a compressor installation with a water-injected compressor element (1) having a water cycle (6) and a water supply device (15) for supplying water to the water cycle (6), containing a water supply line (16) with a controllable valve... | 06/25/2002 |
| 6375443 | Screw rotor type wet vacuum pump A feed pipe 26 for a sealing water is connected to a housing of the pump to communicate with an enclosed chamber which is defined between a position in which a helical seal line of screw rotors 17 isolates the enclosed chamber from a suction port 15 of th... | 04/23/2002 |
| 6315535 | Screw vacuum pump having valve controlled cooling chambers A discharge side housing 3 has a third cooling water chamber 19 communicating with a first cooling water chamber 7 of a main housing 1 through a cooling water passage 26. The third cooling water chamber 19 is connected to a cooling water outlet pipe 27 wh... | 11/13/2001 |
| 6301898 | Rotary positive displacement device A rotary device containing a housing having a curved inner surface with a profile equidistant from a trochoidal curve, an eccentric mounted on a shaft disposed within the housing, a rotor mounted on the eccentric shaft which contains at least three inters... | 10/16/2001 |
| 6059551 | Oil injected screw compressor with thrust force reducing means A screw compressor capable of increasing a pressure receiving area of a balance piston, employing a thrust bearing having a large load capacity, and preventing an occurrence of a reverse thrust load state when started. The rotor shaft extending beyond bot... | 05/09/2000 |
| 5697763 | Tank mounted rotary compressor A rotary compressor having a drive motor and a single pressure vessel, wherein the pressure vessel acts both as a gas oil separator and as a compressed gas storage tank. The compressor employs a control for valves in order to close off the supply of oil a... | 12/16/1997 |
| 5634345 | Oil monitoring system An apparatus and method determines and controls the oil level in one or more refrigeration system compressors. The invention returns lubricating oil to the compressors to maintain oil levels sufficient for proper lubrication of each compressor, and also m... | 06/03/1997 |
| 5626470 | Method for providing lubricant to thrust bearing An apparatus for providing lubricant to thrust bearings and rotors of a rotary screw compressor. The apparatus includes a temperature sensor for sensing the temperature of the lubricant supplied to the rotors; a pressure sensor for measuring the pressure ... | 05/06/1997 |
| 5433590 | Cooling device for the lubrication circuit of a compressor In a cooling device for a rotary piston compressor, in particular a screw-type compressor, which is part of a refrigerant circuit together with a condenser and an evaporator, coolant of the refrigeration system and oil serving to lubricate bearings as wel... | 07/18/1995 |
| 5341658 | Fail safe mechanical oil shutoff arrangement for screw compressor Apparatus as disposed internal of a refrigeration screw compressor which, upon compressor shutdown, shuts off the flow of oil injected into the compressor's working chamber and the oil which is directed to the compressor rotor bearings and which at compre... | 08/30/1994 |
| 5318151 | Method and apparatus for regulating a compressor lubrication system An apparatus for regulating a compressor lubrication system includes an oil-flooded rotary gas compressor, a reservoir flow connected to the compressor, a heat exchanger for cooling a lubricant, and a controller. A thermal mixing valve regulates the tempe... | 06/07/1994 |
| 5221199 | Lubrication oil volume control device in a scroll type compressor A scroll compressor includes a stationary scroll and a rotary scroll rotated by a motor-driven crankshaft. The crankshaft has parallel passages therein which communicate at their lower ends with a pool of lubricating oil. A first of the passages coincides... | 06/22/1993 |
| 5201648 | Screw compressor mechanical oil shutoff arrangement An integral member is disposed internal of a refrigeration screw compressor which, upon compressor shutdown, shuts off the flow of oil injected into the compressor's working chamber as well as the oil directed to the compressor rotor bearings and which, a... | 04/13/1993 |
| 5174741 | Liquid injecting type oil-free screw compressor A liquid injecting type oil-free screw compressor is capable of preventing the generation of polymer in any part inside the compressor main body. A temperature controller detects the gas temperature in a discharge passage of the compressor main body, and ... | 12/29/1992 |
| 5174740 | Hermetic type scroll compressor with regulation of lubricant to the inlet A scroll compressor includes a stationary scroll and an orbit scroll for circulating refrigerant. Lubricant is introduced into the refrigerant at an inlet side of the compressor to maintain a seal between the scrolls. Lubricant is separated from the refri... | 12/29/1992 |
| 5100309 | Cooling medium pump of a rotary piston internal combustion engine An arrangement of a cooling medium pump of a rotary piston internal combustion engine of trochoidal-type of construction with a fluid or liquid cooled housing, with which the cooling medium is conveyed first in common and parallel through cooling hollow c... | 03/31/1992 |
