Did You Know...
...Chester Carlson was a patent agent who tired of having to make multiple copies of patent applications using the only duplication method available at the time: carbon paper. In 1959 he came up with a new copying system and took it to IBM for evaluation. The "experts" at IBM determined potential sales to be only 5,000 units because people wouldn't want to use a bulky machine when they had carbon paper. Carlson's invention was the xerography process, the company founded on the system is Xerox.
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| Number | Title | Issue Date |
| 8123506 | Rotary sliding vane compressor with a secondary compressed fluid inlet The invention relates to increasing the fluid capacity and the fluid discharge pressure of a rotary sliding vane fluid compressor without significantly increasing the fluid discharge temperature. According to the invention supplemental air under pressure is added to... | 02/28/2012 |
| 8075288 | Screw pump and pumping arrangement A screw pump and pumping arrangement including a screw pump having a chamber and externally threaded rotors mounted on shafts for counter-rotation and flow paths with fluid inlets located at a common low pressure side of the chamber. ... | 12/13/2011 |
| 7674098 | Scroll compressor with vapor injection and unloader port A scroll compressor is provided with a passage for providing both an unloader function and an economizer injection function. This common passage communicates with separate ports. The ports that are exclusively used for by-pass unloading operation are open only durin... | 03/09/2010 |
| 7537440 | Scroll compressor with multiple isolated inlet ports A scroll compressor having a scroll wall arrangement with a fixed scroll having fixed scroll walls and an orbiting scroll having orbiting scroll wall, an inlet at a radially outer portion and an outlet at a radially central portion, a first flow path defined by the ... | 05/26/2009 |
| 7419369 | Displacement type expansion machine and fluid machine Disclosed is a displacement type expansion machine. In the displacement type expansion machine, a communicating passage (72) for allowing fluid communication between an expansion-process intermediate position and an outflow position in an expansion chamber ( | 09/02/2008 |
| 7395948 | Multiple tank fluid pumping system using a single pump Disclosed is a system for pumping of fluid by a single pump from a plurality of storage tanks in situations where some of the tanks should be pumped simultaneously at predefined, equal or unequal flow rates, and where some of the tanks should be pumped sequentially,... | 07/08/2008 |
| 7393190 | Discharge valve system of scroll compressor A discharge valve system of a scroll compressor comprises: a fixed scroll having a discharge hole and discharge bypass holes; a discharge valve assembly mounted at the fixed scroll, for opening and closing the discharge hole by a pressure difference; and an integral... | 07/01/2008 |
| 7390180 | Oil pumping device of hermetic compressor A hermetic compressor uses an oil pump that includes a trochoid gear. Therefore, regardless of the rotation speed of a driving motor of the compressor, a sufficient amount of oil can always be pumped. The oil pump unit may include a plurality of suction holes with o... | 06/24/2008 |
| 7361004 | Compression unit of orbiting vane compressor Disclosed herein is a compression unit of an orbiting vane compressor. The compression unit comprises a circular operation space formed in a cylinder, the circular operation space having opposite ends, a circular vane disposed in the operation space for performing a... | 04/22/2008 |
| 7361003 | Slider adapting apparatus for orbiting vane compressors Disclosed herein is a slider adapting apparatus for orbiting vane compressors. A circular vane of an orbiting vane is disposed in an annular space defined in a cylinder. A pair of sliders is coupled with the circular vane for performing reciprocating movement along ... | 04/22/2008 |
| 7361002 | Oil pump An oil pump to be insatalled to an engine of an automotive vehicle. The oil pump includes a section defining a suction port and a section defining a discharge port. A main unit of the oil pump has a section defining a plurality of pump chambers. Volume of each pump ... | 04/22/2008 |
| 7354259 | Scroll compressor having a valved back pressure chamber and a bypass for overcompression There is provided a scroll compressor having high overall adiabatic efficiency and reliability in a wide pressure operating range. A backside excess-suction-pressure region is provided such that pressure higher than suction pressure by a constant value is applied to... | 04/08/2008 |
| 7347135 | Water pressure driven generator A fluid pressure driven generator which includes a generator housing and a rotor positioned within the generator housing. A power shaft is positioned in the rotor with a moment arm connected between the power shaft and rotor. A high fluid pressure inlet will be form... | 03/25/2008 |
| 7347675 | Vane rotary expansion engine A high-efficiency vane rotary expander is provided, which prevents a loss due to incomplete expansion or overexpansion from occurring because the volume of an operating chamber may vary. This is done by forming a plurality of discharge ports (28, 29, 48, 49, 50 | 03/25/2008 |
| 7348526 | Microwave-assisted chromatography preparation An instrument and associated method are disclosed for preparing samples for column chromatography. The method includes the steps of applying microwave energy to a sample composition containing at least one solvent to encourage a chemical reaction and generate desire... | 03/25/2008 |
| 7331411 | Hydraulic traction system for vehicles A hydraulic traction system for vehicles is described. The system comprises a hydraulic vane motor mounted at each wheel of the vehicle, and equal number of identical hydraulic vane motors operated as engine driven pumps, and a control system for regulating the flow... | 02/19/2008 |
| 7329108 | Scroll fluid machine A scroll fluid machine comprises a housing having a fixed scroll and an orbiting scroll revolved by a driving shaft which is driven by a motor behind the housing. A blowing fan is provided between the orbiting scroll and the motor. Rotation of the fan causes decompr... | 02/12/2008 |
| 7318710 | Fixed scroll of scroll compressor Disclosed herein is a fixed scroll of a scroll compressor capable of preventing gaseous refrigerant, that is heated in the compressor or contains a large amount of oil scatted in a compression unit, from being introduced into a compression chamber. The fixed scroll ... | 01/15/2008 |
| 7309220 | Back pressure apparatus for orbiting vane compressors Disclosed herein is a back pressure apparatus for orbiting vane compressors that is capable of reducing excessive axial force applied to an orbiting vane due to high-pressure refrigerant gas introduced to the lower surface of a vane plate of the orbiting vane. The b... | 12/18/2007 |
| 7299629 | Charge/auxiliary circuit for reducing power losses in hydrostatic systems A charge pump is provided with two independent outlets that can satisfy the pressure requirements of both a charge circuit and an auxiliary circuit. Preferably, the charge pump is a multiple roller vane pump that has at least one inlet and two outlets independent of... | 11/27/2007 |
| 7278832 | Scroll compressor with enlarged vapor injection port area Scroll compressors are provided with vapor injection or by-pass ports that will allow greater flow of refrigerant through the port than was the case in the prior art. The prior art has typically utilized a single injection port having a diameter equal to or slightly... | 10/09/2007 |
| 7273360 | Vane-type hydraulic motor A vane-type hydraulic motor includes a rotor (30) having a main shaft (70) and a plurality of vanes (35), a cam casing (10) having a chamber (11) for rotatably housing the rotor (30), a first port (13) and a second po... | 09/25/2007 |
| 7261526 | Cylinder for a vane motor A cylinder to a vane motor is designed to include cylindrically shaped inlet and outlet holes, an axial passage that includes a blocked upstream portion that bypasses the upstream inlet holes, spaced circumferentially slots for leading a portion of the pressurized a... | 08/28/2007 |
| 7257958 | Multi-temperature cooling system A refrigeration system has first and second evaporators which may be operated at first and second temperatures. Refrigerant from a lower temperature evaporator may be returned to a compressor suction port. Refrigerant from the higher temperature evaporator may be re... | 08/21/2007 |
| 7237622 | Pneumatic tool having pressure release device A pneumatic tool includes a rotor rotatably received in a housing, a driving shank coupled to the rotor, for being rotated by the rotor and by a pressurized air and having one end for driving a fastener. A pressure releasing device may release the pressurized air af... | 07/03/2007 |
| 7238095 | Pneumatic grinder with improved muffling structure A pneumatic grinder with improved muffling structure primarily comprises a driving portion, a grinding wheel fixing portion provided at one end of the driving portion, a first housing connected to the other end of the driving portion by means of a combining portion,... | 07/03/2007 |
| 7229257 | Horizontal type compressor A horizontal type compressor comprising: a differential pressure plate for dividing an inside of a casing into a high pressure chamber and a lower pressure chamber and thus maintaining an oil level of the high pressure chamber to be higher than that of the lower pre... | 06/12/2007 |
| 7226280 | Roots vacuum pump In a Roots vacuum pump, an inlet port is located at a position n spaced by a positive displacement angle of 120° in one direction from a center of each rotational axis relative to an imaginary line m connecting rotor axes. An outlet port is located at a position o ... | 06/05/2007 |
| 7214041 | Seal assemblies A seal assembly for the protection of a static seal device for use in a vacuum pump. The seal assembly comprising at least two components which are sealingly connected together, an o-ring seal, which is engaged between the two components to prevent transfer of fluid... | 05/08/2007 |
| 7189068 | Sound reduced rotary vane compressor A rotary vane compressor having features for reducing sound emitted from the compressor during operation. The sound reduction features include and relate to specific components of the compressor. Specifically the features relate to (1) the compressor motor; (2) a no... | 03/13/2007 |
| 7188601 | Oil pump for engine using gerotors having fully filtered oil flow The oil pump has a cam support plate attached to the engine block. The support plate has a pressure relief valve. An oil pump body assembly has a pair of gerotors on each side. The gerotors are attached to and driven by a shaft attached to the rear cam. ... | 03/13/2007 |
| 7186095 | Compressor mounting bracket and method of making A mounting bracket for a compressor. The mounting bracket includes a mounting member and an elongate bracing member. The mounting member is secured to the housing of the compressor has a central support section in substantial registry with the housing. The mounting ... | 03/06/2007 |
| 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 |
| 7165949 | Cavitation noise reduction system for a rotary screw vacuum pump A rotary screw vacuum pump system includes a vacuum bypass system, which communicates with a first closed cell formed by the rotor system. An air bypass valve within an air communication conduit is controlled by a solenoid valve that operates in response to a pressu... | 01/23/2007 |
| 7163383 | Compressor having alignment bushings and assembly method A compressor assembly including a compression mechanism having a main bearing and a plurality of first pilot holes, and an electric motor comprising a rotor disposed within a stator. The stator has a plurality of second and third pilot holes. Each of the first pilot... | 01/16/2007 |
| 7137796 | Scroll compressor There is provided a scroll compressor having high overall adiabatic efficiency and reliability in a wide pressure operating range. A backside excess-suction-pressure region is provided such that pressure higher than suction pressure by a constant value is applied to... | 11/21/2006 |
| 7118358 | Scroll compressor having a back-pressure chamber control valve There is provided a scroll compressor having high overall adiabatic efficiency and reliability in a wide pressure operating range. A backside excess-suction-pressure region is provided such that pressure higher than suction pressure by a constant value is applied to... | 10/10/2006 |
| 7114931 | Rotary pump A rotary pump includes a stator housing and a rotor. The stator housing preferably has an oblong inner surface. The rotor, which is disposed in the stator housing, preferably has a substantially circular outer surface within which a plurality of vane slots are defin... | 10/03/2006 |
| 7094042 | Dual-inlet gear pump with unequal flow capability A dual-inlet gear pump includes a drive gear and a driven gear. The invention utilizes the discovery that the drive gear will typically move a higher flow volume than does the driven gear, particularly when the fluid being moved is an air/oil mixture. The present in... | 08/22/2006 |
| 7094038 | Vacuum preventing device for scroll compressor Disclosed is a vacuum preventing device including a housing engaged to one side of an outer circumference portion of a fixed scroll to divide the area into a discharge region and a suction region, a chamber formed in the housing and having a compression hole connect... | 08/22/2006 |
