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| Number | Title | Issue Date |
| 8172561 | Metal part and method of manufacturing metal part A metal part in which a base material of silicon-aluminum alloy having 1 to 25% by mass of silicon as an anode is immersed in an electrolyte together with a cathode, and at least a portion of a surface of the base material is anodized and coated with an anodic oxide... | 05/08/2012 |
| 8096796 | Temporary self-lubricating coating for scroll compressor A sealed compressor is provided with a spray lubricant that will provide lubricant at various bearing surfaces during initial start-up of the compressor. The lubricant will wear away quickly after initial run-in, but liquid lubricant will be provided by that time. | 01/17/2012 |
| 8092201 | Vane pump with coated vanes Provided is a vane pump. In the vane pump, a high-hardness main coating layer is provided on a distal end portion of each vane, and an intermediate coating layer having an intermediate hardness between a hardness of a base material of the vane and a hardness of the ... | 01/10/2012 |
| 7997884 | Rotary device and oil pump having α-alumina and zirconia coating An oil pump has: a base part having a working chamber; and a rotor provided rotatably in the working chamber. The base part is configured by a plurality of split bodies. At least one of the plurality of split bodies is made of aluminum alloy, and on which an opposed... | 08/16/2011 |
| 7811071 | Scroll compressor for carbon dioxide refrigerant A scroll machine is provided with wear resistant features to provide the scroll machine with improved operation when processing CO2 refrigerant. In certain aspects, the scroll machine has an Oldham coupling comprising aluminum, where the aluminum has an a... | 10/12/2010 |
| 7699591 | Scroll compressor with surface processed orbiting scroll plate back surface A scroll compressor in which a scroll fixed lap rising from a fixed plate of a fixed scroll and a scroll orbiting lap rising from an orbiting plate of an orbiting scroll are combined with each other to form compression chambers therebetween, the fixed scroll is made... | 04/20/2010 |
| 7658600 | Scroll compressor with thrustplate peeling prevention There is provided a scroll compressor in which reliability and durability is increased by preventing peeling of a coating layer applied to a thrust plate, to maintain a desired level of lubrication for a long period of time. The scroll compressor has a thrust plate,... | 02/09/2010 |
| 7442019 | Stator of a moineau-pump A Moineau stator includes a tube (10) having lobes (3) arranged in a configuration which is adapted to interact with a rotor and formed through a hydroforming process. ... | 10/28/2008 |
| 7407372 | Progressing cavity pump or motor A progressing cavity pump or a motor includes, in one embodiment, an outer tube 12, an inner tube 14, and a plurality of apertures 16. A pair of annular seal glands 18 seal the stator material to the outer tube. The stator material is inj... | 08/05/2008 |
| 7347061 | Oil checking device for compressor of air conditioning system An oil checking device for compressor of air conditioning system includes an oil container connected to an high-pressure part of the air conditioning system to receive refrigerant and oil from the high-pressure part, the oil container being formed of a transparent m... | 03/25/2008 |
| 7329106 | Stator for an eccentric screw pump or an eccentric worm motor operating on the moineau principle The invention relates to a stator for an eccentric screw pump or an eccentric worm motor, including an outer tube that is provided with a lining of rubber or a rubber-like material and has a hollow space or cavity, in the shape of a double or multiple spiral, for ac... | 02/12/2008 |
| 7316548 | Stator for an eccentric screw pump or an eccentric worm motor operating on the Moineau principle The invention relates to a stator for an eccentric screw pump or an eccentric worm motor having a stator, including an outer tube that is provided with a lining of rubber or a rubber-like material and has a hollow space, in the shape of a double or multiple spiral, ... | 01/08/2008 |
| 7287970 | Roots compressor A roots compressor has a housing, a rotary shaft, a rotor and a layer. The housing defines a pump chamber, a suction port and a discharge port. The suction port and the discharge port adjoin to the pump chamber. The rotary shaft is rotatably supported by the housing... | 10/30/2007 |
| 7247348 | Method for manufacturing a erosion preventative diamond-like coating for a turbine engine compressor blade Methods for making an erosion resistant gas turbine engine compressor airfoil substrates coated with a diamond-like coating (DLC), wherein the coating airfoil substrates are protected from ingested abrasive particulates, may include the step of performing a hydrogen... | 07/24/2007 |
| 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 |
| 7214042 | Progressing cavity pump with dual material stator A progressing cavity pump including a rotor and a stator having an inlet and an outlet. The rotor is rotationally disposed inside of the stator such that rotation of the rotor causes fluid in the pump to be pumped from the inlet toward the outlet in a downstream dir... | 05/08/2007 |
| 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 |
| 7192260 | Progressive cavity pump/motor stator, and apparatus and method to manufacture same by electrochemical machining Electrochemical machining is used to generate the helical lobe profiles of the stator of a progressive cavity pump or motor. A thin, elastomeric liner, of uniform thickness is bonded either to the interior of the stator, or to the exterior of the rotor. Where the el... | 03/20/2007 |
| 7192263 | Pump and ink jet printer mounting the pump The pump is provided with a housing 31, a rotor 40, and a separating member 50. Rotor 40 and separating member 50 are rotated within housing 40. Separating member 50 separates the cavity of housing 31 into a divided space 77a, a divided space 7b and a ... | 03/20/2007 |
| 7179067 | Scroll compressor with wrap walls provided with an abradable coating and a load-bearing surface at radially outer locations An abradable coating is formed on portions of the flank wall of the wraps of a scroll compressor. The radially outer portions of the flank wall are left uncoated, and can bear a force between the scroll wraps. In this manner, the load is not transferred through a co... | 02/20/2007 |
| 7172821 | Coating material having corrosion resistance and wear resistance A coating material has a first layer deposited on a base material and a second layer deposited on the first layer. The first layer is made of a Ni-base alloy or a Co-base alloy containing carbon as an unavoidable impurity. The second layer is made of a hard material... | 02/06/2007 |
| 7153111 | Screw machine A screw machine (10) has a rotor housing (12) defining overlapping bores (12-1, 12-2). Female rotor (14) is located in bore (12-1) and male rotor (16) is located in bore (12-2). A wear resi... | 12/26/2006 |
| 7131827 | Stator for an eccentric screw pump or an eccentric worm motor operating on the moineau principle The invention relates to a stator for an eccentric screw pump or an eccentric worm motor, including an outer tube that is provided with a lining of rubber or a rubber-like material and has a hollow space or cavity, in the shape of a double or multiple spiral, for ac... | 11/07/2006 |
| 7128544 | Crescent seal for the cylinder of a vane motor A vane motor is modified to increase the sealing effectiveness of the gap made at the interface of the spindle and cylinder by undercutting the cylinder a predetermined amount and distance so as to increase the effectiveness of the spindle to cylinder gap and to dec... | 10/31/2006 |
| 7121812 | High pressure pump having replaceable plunger/valve cartridges A high pressure fluid jetting system generally includes a fluid cylinder pump, a drive assembly, a pressurized liquid supply and an applicator gun. The drive assembly includes a diesel engine or electric powered motor which drives a rotatable drive shaft. The drive ... | 10/17/2006 |
| 7115197 | Coating process This invention relates to a process for electroplating a selected surface area of a component with a crushable zinc alloy, the method comprising utilizing a relatively low current density in an alkaline solution during the electroplating process to provide a crushab... | 10/03/2006 |
| 7108485 | Reduction in the noise produced by a rotor blade of a wind turbine Rotor blades for wind power installations are known in many different forms. In a wind power installation the rotors or the rotor blades thereof represent the main source of sound. For reasons relating to acceptance and noise prevention laws, the aim should/must be ... | 09/19/2006 |
| 7108829 | Method of manufacturing sliding part and compressor provided with the sliding part A method of manufacturing a sliding part includes the steps of forming a green member by injection molding integrally and unmixedly two powdery metallic materials of different compositions, sintering the green member and subjecting the green member to at least one h... | 09/19/2006 |
| 7086845 | Vane pump having an abradable coating on the rotor A vane pump includes a cylindrical rotor rotatable inside of an oval-shaped rotor chamber of cam ring disposed between a pressed plate and a pressure plate. The rotor has opposite sides and a peripheral outer surface in which radial vane slots are formed and guide s... | 08/08/2006 |
| 7070395 | Variable capacity rotary compressor A variable capacity rotary compressor to prevent an eccentric bush and a locking pin from being deformed or worn out due to a variance in a pressure of a compression chamber as a rotating shaft rotates. The compressor includes upper and lower compression chambers ha... | 07/04/2006 |
| 7052258 | Trochoidal pump To reduce noise caused by pulsation generated when fluid is expelled, in a trochoidal pump comprising an inner rotor and outer rotor having trochoidal toothed shapes. [Means of Solution] The inner rotor 5 and outer rotor 6 having trochoidal toot... | 05/30/2006 |
| 7014438 | Fluid machinery A fluid machinery such as helical compressor includes a sliding mechanism comprising one side member composed, in combination, of a metallic base member having a sliding surface and a lubrication film formed on the sliding surface in a close contact thereto, and a c... | 03/21/2006 |
| 7008201 | Gapless screw rotor device A screw rotor device has a housing with an inlet port and an outlet port, a male rotor with helical threads, and a female rotor with helical grooves. The helical threads and helical grooves are designed to eliminate the blow hole leak pathway for multiple-pitch scre... | 03/07/2006 |
| 6988877 | Screw machine A screw machine (10) has a rotor housing (12) defining overlapping bores (12-1, 12-2). Female rotor (14) is located in bore (12-1) and male rotor (16) is located in bore (12-2). A wear resi... | 01/24/2006 |
| 6986652 | Screw machine A screw machine (10) has a rotor housing (12) defining overlapping bores (12-1, 12-2). Female rotor (14) is located in bore (12-1) and male rotor (16) is located in bore (12-2). A wear resi... | 01/17/2006 |
| 6974315 | Reduced friction gerotor An oil pump for a vehicle engine. The oil pump includes an oil pump housing and a gerotor. The oil pump housing includes a cavity that defines an inside diameter. The gerotor is positioned within the cavity, is rotatable relative to the housing, and defines a thickn... | 12/13/2005 |
| 6948922 | Hermetic compressor and open compressor The present invention provides a hermetic or open compressor for hydrocarbon refrigerant having high reliability. According to the present invention, in the compressor using hydrocarbon as refrigerant, synthetic oil such as polyalkylene glycol oil, ester oil or ethe... | 09/27/2005 |
| 6920853 | Variable valve timing control device A variable valve timing control device includes a rotation member for opening or closing a valve, a rotation transmission member engaged with the rotation member to be relatively rotatable, a vane provided on either one of the rotation member or the rotation transmi... | 07/26/2005 |
| 6918749 | Compressor with aluminum housing and at least one aluminum rotor The compressor has two rotors (14, 16), which are rotatably mounted in a housing (10) by means of a shaft each, the rotors (14, 16) rotating without contact with the housing. The rotors (14, 16) consist of a powder-metallurgical Al—Si a... | 07/19/2005 |
| 6893240 | Screw machine A screw machine (10) has a rotor housing (12) defining overlapping bores (12-1, 12-2). Female rotor (14) is located in bore (12-1) and male rotor (16) is located in bore (12-2). A wear resi... | 05/17/2005 |
