Did You Know...
...that the inventor of the electric motor was a blacksmith named Thomas Davenport? Described as "a brilliantly unsuccessful inventor", Davenport invented the first rotary electric motor. In 1836 he headed out -- on foot -- from his Vermont home to file a patent application at the Patent Office in Washington, D.C. By the time he got there, he had squandered away his money and couldn't afford the $30 filing fee so he turned around and went home. When he later mailed in his application with money he'd raised, the Patent office was destroyed in a fire. He did finally get credit for his invention on Feb. 5, 1837.
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| Number | Title | Issue Date |
| 7435066 | Oil pump The present invention provides an oil pump in which eroding of the inside of the pump due to cavitation and erosion is prevented by minimizing the pressure change in a fluid when inter-tooth spaces formed by an inner rotor and an outer rotor transport the fluid from... | 10/14/2008 |
| 7404705 | Blending pump assembly A blending pump assembly for accurately maintaining the proper ratio of two fluid components. Flow of a first fluid is utilized to drive a fluid motor, which in turn drives a pumping mechanism to inject a proportional amount of a second fluid into the flow of the fi... | 07/29/2008 |
| 7367790 | Double-acting type orbiting vane compressor The double-acting type orbiting vane compressor comprises an orbiting vane having upper and lower circular vanes formed at the upper and lower surfaces of a vane plate of the orbiting vane, respectively, the orbiting vane being attached to a crankshaft rotatable by ... | 05/06/2008 |
| 7364417 | Compression unit of orbiting vane compressor Disclosed herein is a compression unit of an orbiting vane compressor having improved tight contact between a circular vane and sealing means wherein the sealing means can be easily manufactured. The compression unit compresses refrigerant gas introduced by an orbit... | 04/29/2008 |
| 7354026 | Unitary blade seal for a shearing blind ram in a ram type blowout preventer A unitary blade seal for a shearing blind ram of a ram-type blowout preventer is disclosed and includes an elongate member having a generally semi-circular cross section with a curved upper surface and a lower surface. The lower surface has a pair of laterally exten... | 04/08/2008 |
| 7353796 | Rotary machine The rotary machine can be used as a rotary internal combustion engine and as a pneumatic or hydraulic pump. The rotary machine comprises a housing in the form of two intersecting cylinder parts of different diameters having parallel axes. A rotor is received in the ... | 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 |
| 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 |
| 7329107 | Oil supply structure for slider of orbiting vane compressor Disclosed herein is an oil supply structure for a slider of an orbiting vane compressor capable of providing effective lubrication to reciprocating surfaces of the slider reciprocating in an annular space of a compressor cylinder. The oil supply structure comprises ... | 02/12/2008 |
| 7264454 | Rotary combustion engine with an improved inner seal A rotary combustion engine includes a peripheral housing, a front housing plate, a rear housing plate, a piston, and an eccentric shaft, where the piston rotates to form three working spaces separated from each other by the tips of the piston. Shaft seals and piston... | 09/04/2007 |
| 7255929 | Use of spray coatings to achieve non-uniform seal clearances in turbomachinery The invention provides spray coatings to achieve circumferentially non-uniform seal clearances in turbomachines. In steam and gas turbines it is desirable to assemble the machines with elliptical seal clearances to compensate for expected casing distortion, rotordyn... | 08/14/2007 |
| 7216579 | Variable flow control devices, related applications, and related methods Devices for adjustably controlling a flow of fluid through a common passage and through first and second auxiliary passages are disclosed. The flow control devices may be used for controlling the steering of a vehicle having independently controlled driven structure... | 05/15/2007 |
| 7185625 | Rotary piston power system The rotary piston power system includes a housing having a drum and a cover rotatably mounted on the drum. The drum has high pressure and low pressure ports defined in its peripheral wall and a central separator wall having arcuate end faces and a pair of semicylind... | 03/06/2007 |
| 7131826 | Blending pump assembly A blending pump assembly for accurately maintaining the proper ratio of two fluid components. Flow of a first fluid is utilized to drive a fluid motor, which in turn drives a pumping mechanism to inject a proportional amount of a second fluid into the flow of the fi... | 11/07/2006 |
| 7070402 | Integrated speed reducer and pump assembly An integrated speed reducer and gerotor pump is disclosed. The device comprises a motor, a speed reducer, and a gerotor pump. The motor provides torque at an elevated speed. The speed reducer is coupled with the motor and converts the torque at an elevated speed int... | 07/04/2006 |
| 7047122 | Extrapolation method for the angle-of-rotation position A method is described for determining the angle-of-rotation position (φ) of a shaft of an internal combustion engine, in particular a crank angle (φ) of a crankshaft, information at least about incremental angles of rotation (Δφ) of the shaft and running times (... | 05/16/2006 |
| 6974310 | Screw extruder and gear pump arrangement for highly viscous media A screw extruder and gear pump arrangement for highly viscous media includes a screw shaft and a gear pump operatively coupled to the screw shaft. A planet carrier is operatively engaged with at least one rotatably mounted planet gear, a first functional element tha... | 12/13/2005 |
| 6911795 | Electric motor apparatus and power steering system In an electric motor apparatus of the present invention, both of energized spiral wires 17A and 17B for a first system 18A and a second system 18B cooperate to rotate the rotor 25 in a normal condition, however, when it is happened... | 06/28/2005 |
| 6887053 | Rotary piston engine in trochoidal design In a rotary piston engine in trochoidal design with a rotor housing, made of light metal, and with side parts, which are made of light metal, it is provided that the bearing bodies are connected in an area, in which the maximum gas pressures develop, by means of tie... | 05/03/2005 |
| 6883488 | Rotary combustion engine A rotary combustion engine includes a driving eccentric ring arranged between a non-rotary outer casing and a non-rotary inner casing for rotating a power shaft situated inside the inner casing. In order to drive the eccentric ring, a combustion chamber arrangement ... | 04/26/2005 |
| 6481988 | Internal combustion engine First pivot bodies are received for rotation in first recesses in the housing member. A piston member is mounted in a eccentric portion of the drive shaft such to orbit in operation. Second pivot bodies are received for rotation in second recesses in the ... | 11/19/2002 |
| 6406279 | Displacement type fluid machine A displacement type fluid machine has a sliding contact portion between a cylinder 4 and a displacer 5 made into a predetermined section, and the cylinder and the displacer so contoured that when they are made concentric, the normal distance in the slidin... | 06/18/2002 |
| 6352418 | Displacement type fluid machine A displacement type fluid machine which is easier to machine and assemble than a scroll type fluid machine and has high performance and low cost. A displacer is revolved in a cylinder having an inside wall formed by a curve such that a planar shape is con... | 03/05/2002 |
| 6332764 | Displacement type fluid machine having an orbiting displacer forming a plurality of spaces and method for manufacturing same A displacement type fluid machine for reducing a fluid loss of a discharge process as much as that of a scroll fluid machine has a displacer which is provided with at least one through hole for working the outer wall surface of said displacer during manuf... | 12/25/2001 |
| 6332763 | Displacement type fluid machine having an orbiting displacer forming a plurality of spaces In order to provide a displacement type fluid machine for reducing a fluid loss of a discharge process as much as that of a scroll fluid machine, easily prepared than the scroll fluid machine, in the displacement type fluid machine wherein a shaft is gyra... | 12/25/2001 |
| 6312237 | Displacement type fluid machine In a displacement type fluid machine wherein a space is formed by the inner wall surface of a cylinder and the outer wall surface of a displacer when the center of the cylinder is located on the center of the displacer, and a plurality of working chambers... | 11/06/2001 |
| 6220841 | Displacement type fluid machine In a displacement type fluid machine wherein a space is formed by the inner wall surface of a cylinder and the outer wall surface of a displacer when the center of the cylinder is located on the center of the displacer, and a plurality of working chambers... | 04/24/2001 |
| 6217303 | Displacement fluid machine An orbiting fluid machine has a feature that the speed of sliding movement is low, while vibrations are small, its performance is lowered when the rotational speed becomes high, and this problem is resolved by the following structure. A displacement fluid... | 04/17/2001 |
| 6213743 | Displacement type fluid machine A conventional displacement type fluid machine is featured by a low sliding rate and in low vibrations and pulsations, but has a problem, that the radial gap in a displacer sliding portion is enlarged by the clearance of a shaft drive system and a rotatin... | 04/10/2001 |
| 6183228 | Displacement type fluid machine A displacement type fluid machine in which a displacer and a cylinder are disposed between end plates, a space is formed by an inner wall surface of the cylinder and an outer wall surface of the displacer when the center of the displacer is put on the cen... | 02/06/2001 |
| 6179593 | Displacement fluid machine Side wall surface of an orbiting piston and inner wall surface of a cylinder define therebetween a plurality of working chambers, a space for compressing (discharging) a working fluid is defined between spaces for sucking thereinto the working fluid among... | 01/30/2001 |
| 6164941 | Displacement type fluid machine having an orbiting displacer forming a plurality of spaces In order to provide a displacement type fluid machine for reducing a fluid loss of a discharge process as much as that of a scroll fluid machine, easily prepared than the scroll fluid machine, in the displacement type fluid machine wherein a shaft is gyra... | 12/26/2000 |
| 6152714 | Displacement type fluid machine having rotation suppression of an orbiting displacer A conventional displacement type fluid machine involves a problem that a mechanical friction loss and leakage in sliding portions are large, so that its reliability and performance are poor, and therefore it has not yet been put into practical use. In a d... | 11/28/2000 |
| 6099279 | Displacement fluid machine An orbiting fluid machine has a feature that the speed of sliding movement is low, while vibrations are small, its performance is lowered when the rotational speed becomes high, and this problem is resolved by the following structure. A displacement fluid... | 08/08/2000 |
| 6095783 | Fluid mover A pump for moving a fluid has a housing with a cylindrical internal chamber accommodating a cylindrical piston. The piston is eccentrically secured to a shaft rotatably mounted on the housing. A baffle located in a recess in the housing controls the flow ... | 08/01/2000 |
| 6065289 | Fluid displacement apparatus and method The present invention relates generally to fluid displacement apparatuses and methods. The inventive apparatus comprises: a housing having an interior space; a crankpin positionable in the interior space; and a plurality of articulated displacement member... | 05/23/2000 |
| 5681156 | Piston machine having a piston mounted on synchronously rotating crankshafts A piston machine usable as an expansion engine, suction pump or compressor for a compressible medium has a housing containing a working space with two parallel walls and an interconnecting peripheral wall perpendicular to the parallel walls, the periphera... | 10/28/1997 |
| 5092752 | Seal assembly for a rotary device A seal assembly slidably mounted in a slot in the piston engages the cylindrical internal wall of the housing to form separate chambers. The housing has arcuate slots non-concentric with its cylindrical internal wall accommodating rollers connected to the... | 03/03/1992 |
| 5080562 | Annular rolling rotor motor compressor with dual wipers A rolling rotor motor/compressor is provided with an external rotor/piston which coacts with a bore/cylinder in the housing and one or more vanes to define a rolling piston compressor. Thus, the stator does not form a part of the compression chamber. The ... | 01/14/1992 |
| 5074769 | Compressor having an orbital rotor with parallel linkage and spring biased vanes A rotary compressor includes a support member for supporting a revolution piston while preventing rotary movement thereof with respect to its axis, and at least two sliding blades provided in the revolution piston. Both blades are biased against a surroun... | 12/24/1991 |
