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| Number | Title | Issue Date |
| 8087904 | Hybrid hydraulic-electric RAM pumping unit with downstroke energy recovery A hybrid hydraulic-electric pumping unit (12) with downstroke energy recovery is disclosed which is operated in a conventional flow mode to supply hydraulic fluid to a hydraulic ram (26), and then is operated in a reverse flow mode to receive the hydra... | 01/03/2012 |
| 8011897 | Cam driven piston compressor A cam driven piston compressor includes one or more cams powered by a motor, the cams being adapted to rotate through 360 degrees, and one or more cam followers, each of which is in contact with one of the cams. The compressor also includes one or more pistons where... | 09/06/2011 |
| 7585158 | Piston engine comprising a pulsation-reducing device The invention relates to a piston engine comprising a rotatably mounted cylindrical drum (2) provided with a plurality of cylindrical boreholes distributed over the circumference thereof and containing displaceable pistons. Said cylindrical boreholes (3,4 | 09/08/2009 |
| 7377754 | Compressor A compressor includes a swash plate, and a shoe connected to an outer periphery of the swash plate. A surface of the swash plate slides upon a flat surface of the shoe. A sliding film is applied to the surface of the swash plate. The sliding film is formed of binder... | 05/27/2008 |
| 7347310 | Apparatus for validating and paying out coins The object of the present invention is to provide apparatus for validating and paying out coins, which can guide metal fragments to the surface of the driving motor such that the guided metal fragments are attracted to the surface of the driving motor so as to preve... | 03/25/2008 |
| 7337869 | Hydraulic hybrid vehicle with integrated hydraulic drive module and four-wheel-drive, and method of operation thereof A vehicle includes an integrated drive module coupled to an axle thereof. The module includes a hydraulic motor configured to provide motive power at an output shaft, and a differential for distributing the motive power to right and left portions of the axle. The hy... | 03/04/2008 |
| 7245042 | Auxiliary wind energy generation from a wind power generation apparatus A wind energy generator has a generator having a shaft extending therefrom, a plurality of blades interconnected to the shaft so as to be rotatable by the action of wind energy, and an elongate chamber cooperative with the shaft such that the chamber rotates relativ... | 07/17/2007 |
| 7204249 | Oxygen conserving device utilizing a radial multi-stage compressor for high-pressure mobile storage An oxygen concentrator is utilized in combination with a compressor, preferably a radial compressor, to provide a highly enriched and compressed oxygen gas in a mobile container such as a gas cylinder. The combination and method of production provides for the facile... | 04/17/2007 |
| 7182583 | Electro-hydraulic power unit with a rotary cam hydraulic power unit An electro-hydraulic power unit is disclosed that includes a housing filled with hydraulic fluid. A hydraulic power unit is disposed within the housing, the power unit having a mechanical power shaft. Additionally, an electric machine is disposed within the housing ... | 02/27/2007 |
| 7179061 | Multi-layer compressor housing and method of manufacture A multi-layered compressor housing and method of manufacture is provided. The housing defines an interior space and includes first and second layers having first and second major surfaces respectivley. The first and second layers are secured together by the friction... | 02/20/2007 |
| 7128541 | Oscillating displacement pump An oscillating displacement pump, particularly a diaphragm pump (P) for liquid or gaseous delivery media, having a delivery space which on the one side is delimited by a pump head and on the other side by a delivery element, particularly formed by a diaphragm (6 | 10/31/2006 |
| 7121190 | Fluid machine for gas compression refrigerating system A fluid machine for a gas compression refrigerating system comprises a first and a second working for performing a pump mode operation, in which working fluid of low pressure is sucked into and compressed by the working chambers. The fluid machine further comprises ... | 10/17/2006 |
| 7111835 | Clamp apparatus A clamp apparatus has a lower body. A rotary driving source driven by an electric signal, a pump mechanism having a pressure oil-sucking/discharging mechanism energized/deenergized by the rotary driving source, a cylinder mechanism provided with a piston for moving ... | 09/26/2006 |
| 7047867 | Oscillating device for adjusting the displacement of a fluid pump A device for adjusting the displacement of a fluid pump includes a swashplate supported for pivotal movement about a first axis, and an engine having first and second cylinders. A first piston is located in the first cylinder and secured to the swashplate at a first... | 05/23/2006 |
| 7029245 | Blood pumping unit, with a coplanar disk inlet valve and an annular outlet valve A unit for pumping fluid, particularly blood, is provided with an enclosure that has two half-shells and an elastic membrane fixed perimetrically to the enclosure in order to divide its space into two parts. One of the half-shells is provided with valves that are lo... | 04/18/2006 |
| 6998729 | Wind energy plant having an observation platform The invention concerns a wind power installation comprising a rotor which is coupled to a generator within a machine housing. Such wind power installations have already long been known, for example the wind power installations of types E-40 and E-66 from Enercon, Au... | 02/14/2006 |
| 6949854 | Method and apparatus for a continuously variable-ratio transmission A method and apparatus for providing a continuously variable transmission (CVT) is described. The CVT comprises permanent magnets to couple power, a coefficient of coupling controlled by an electronic servo control loop. Wherein torque multiplication is achieved by ... | 09/27/2005 |
| 6945062 | Heat pump water heating system including a compressor having a variable clearance volume A heat pump water heater system includes a compressor that has a variable clearance volume that can be selectively controlled to control the mass flow rate of refrigerant from the compressor. Under higher ambient air temperature conditions, the variable volume is in... | 09/20/2005 |
| 6923180 | Oxygen conserving device utilizing a radial multi-stage compressor for high-pressure mobile storage An apparatus and process for supplying low pressure oxygen-enriched gas to a patient and at a moderate pressure to a radial compressor, whereupon it is compressed and fed to a high pressure storage tank. The oxygen-enriched gas is prioritized so that it is continuou... | 08/02/2005 |
| 6921253 | Dual chamber micropump having checkvalves A micropump has two chambers separated by an actuator for causing fluid to flow in the chambers. Each chamber is equipped with a ball that acts as a valve for allowing flow in a desired direction. The balls are heavier than the fluid being pumped, and reside at an i... | 07/26/2005 |
| 6863505 | Wind driven high pressure water pump This invention relates to a wind mill which is designed to convert rotational energy to mechanical energy to drive one or more pistons to raise a liquid such as water to an elevated location if necessary at a positive pressure. In addition, the present invention may... | 03/08/2005 |
| 6776589 | Reciprocating piston compressor having improved noise attenuation A reciprocating piston compressor having a suction muffler and a pair of discharge mufflers to attenuate noise created by the primary pumping frequency in the primary pumping pulse. The suction muffler is disposed along a suction tube extending between the motor cap... | 08/17/2004 |
| 6565329 | Electric type swash plate compressor The object of the present invention is to offer an electric type swash plate compressor which is compact and reduced in weight and lightened, and which can efficiently cool down a motor chamber and a crank chamber. The compressor has an electric motor and a sw... | 05/20/2003 |
| 6554583 | Swash plate compressor with reciprocal guide assembly Novel and improved forms of guide assemblies are provided for a swash plate type of air compressor, a first form of invention including a linear slider, which is movable up and down a support rod to maintain the rotational position of the swash plate rela... | 04/29/2003 |
| 6524084 | Motor pump unit A motor pump aggregate M has a housing 1 defining an oil reservoir with first and second chambers R1, R2. An electromotor 2 is driving via its motor shaft W at least one radial piston pump arrangement P1 provided within said first chamber R2. Both chamber... | 02/25/2003 |
| 6499962 | Bearing arrangement for a swash plate pump A swash-plate-end bearing for the motor shaft in a high pressure cleaning appliance which includes a motor and a reciprocating pump driven thereby, wherein the pistons of said pump rest resiliently on a swash plate driven by the motor whose shaft is rotat... | 12/31/2002 |
| 6481985 | Maximizing the load torque in a swash plate compressor A motor-driven compressor performs suction, compression, and discharge of refrigerant. The compressor has four cylinder bores and four pistons. A swash plate is integrally rotated with a drive shaft. A transmission mechanism transmits rotation of the swas... | 11/19/2002 |
| 6092455 | Hydraulic pressure transformer A hydraulic pressure transformer for the conversion of an input hydraulic power to an output hydraulic power includes a housing with a generally planar face surface and a plurality of ports opening at the face surface. A barrel which is rotatable about an... | 07/25/2000 |
| 6078118 | Electric motor-pump assembly The present invention discloses a combination of an electric motor and a pump with a compact design. It is important that the pump housing 9 is made of plastic material and slid into the housing periphery 2 of the electric motor so that it embraces the pu... | 06/20/2000 |
| 6056515 | Hydrocleaning machine with pump mounting closure lid A vertically oriented hydrocleaning machine comprising a motor having a housing and a downwardly oriented vertical drive shaft, and an axial pump having a piston guide unit driven by the drive shaft. The motor housing includes a closure lid which defines ... | 05/02/2000 |
| 5957667 | Oilless compressor with a pressurizable crankcase and motor containment vessel An oilless gas compressor includes a motor containment vessel containing a motor for driving the compressor and a crankcase attached to the motor containment vessel. The crankcase and the motor containment vessel are fluidly connected and together define ... | 09/28/1999 |
| 5877577 | Electric hydraulic hybrid motor, control device and control method for the same motor The present invention is an electric hydraulic hybrid motor, a control device, and a control method for the same motor, which is small in size and simple in construction, which can be equal horsepower controlled or torque limiter controlled when required.... | 03/02/1999 |
| 5755562 | Thrust reduction plate for an axial piston fuel pump A fuel injection system for injecting gasoline or other fuel directly into the combustion chambers of an internal combustion engine including a pump that incorporates a rotary driven swash plate, a plurality of fuel pumping pistons radially separated from... | 05/26/1998 |
| 5741124 | Double insulated electrically driven water pump In order to protect a user from receiving an electric shock, an electric motor driven high pressure water pump system having an electric motor, a pump associated with the electric motor via of a direct drive shaft, and a fan housing wherein the electric m... | 04/21/1998 |
| 5601417 | Hydraulic pump with ball bearing pistons A hydraulic power unit combining a number of cylinders using ball bearings to displace hydraulic fluid sequentially with controlled flow to a number of hydraulic actuators. A power unit could combine a minimum of two cylinders through ten or twelve cylind... | 02/11/1997 |
| 5591013 | Fluid pressure generating device A fluid pressure generating device is provided which is capable of reducing noise and vibration and improving durability and yet which is simple in construction and successful in assemblability. A cylinder block having a main shaft substantially at a cent... | 01/07/1997 |
| 5511956 | High pressure fuel pump for internal combustion engine A high pressure pump for an engine fuel injection system, wherein the pump has a plurality of positive displacement pumping devices that are operating so that their delivery cycles overlap and so that the instantaneous speed of the pumping devices during ... | 04/30/1996 |
| 5450987 | Pumping system with failure responsive discharge valve A pumping system including a bulk liquid container having a pump mounted in the container top with a suction tube attached to the pump and extending into the container. A drive motor is drivably attached to the pump. The pumping system includes an automat... | 09/19/1995 |
| 5380168 | Axial multi-piston compressor having rotary valve for allowing residual part of compressed fluid to escape An axial multi-piston compressor includes a drive shaft, a cylinder block having cylinder bores formed therein and surrounding the drive shaft, and a plurality of pistons slidably received in the respective cylinder bores, wherein the pistons are successi... | 01/10/1995 |
| 5366351 | Pump with failure responsive discharge valve An automatic shut-off valve for use with a chemical container and installed pump. The shut-off valve closing in response to an accidental dislodging of the pump motor from the pump.... | 11/22/1994 |
