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| Number | Title | Issue Date |
| 8181458 | Pressure recovery system A pressure recovery system according to the present invention comprises a pump, a flow control valve and a flow amplifier. The flow control valve has an inlet connected to the outlet of the pump, an outlet for supplying fluid to the load to which pressurized fluid i... | 05/22/2012 |
| 7775040 | Bidirectional hydraulic transformer A hydraulic transformer is disclosed. The hydraulic transformer may have a housing, and a first pumping mechanism disposed within the housing and rotated in a first direction by fluid pressure. The hydraulic transformer may also have a second pumping mechanism dispo... | 08/17/2010 |
| 7249457 | Hydraulic gravitational load energy recuperation A hydraulic system has gravitional load energy recuperation by opening a recuperation piloted valve with a pilot pressure supplied by a hydraulic pump so as to drive a recuperation hydraulic motor with a source of fluid pressurized by gravity from the load. The recu... | 07/31/2007 |
| 7152074 | Extensible framework supporting deposit of heterogenous data sources into a target data repository A method, system and article of manufacture for architecting a relationship between different representations of data. One embodiment provides a method of architecting a relationship between a first physical representation of data and a second physical representatio... | 12/19/2006 |
| 7146376 | Data abstraction model driven physical layout A method, system and article of manufacture for accessing data in a database independent of the particular manner in which the data is physically represented and for modeling a physical representation of the data in the database for architecting a relationship betwe... | 12/05/2006 |
| 7028470 | Apparatus for executing activities assisted by hydromotors and a hydraulic transformer for use in such an apparatus The invention relates to an apparatus for executing activities assisted by equipment driven by means of rotating or linear hydromotors. The hydromotors may be loaded and/or moved in two directions. The hydromotors are coupled via a connecting line and a hydraulic tr... | 04/18/2006 |
| 7000386 | Hydraulic intensification circuit with rotary flow devider and bypass valve A hydraulic drive circuit comprises a source of fluid flow, at least one hydraulic actuator and a rotary flow divider which operates in conjunction with valve means to provide intensified flow to the at least one hydraulic actuator. ... | 02/21/2006 |
| 6973782 | Pressurized hydraulic fluid system with remote charge pump A pressurized hydraulic fluid system includes a charge pump, a hydraulic motor drivingly coupled to the charge pump, and a main hydraulic unit adapted to function as a pump to drive the hydraulic motor. The charge pump is in fluid communication with the main hydraul... | 12/13/2005 |
| 6931846 | Equalizing flow from pressure compensated pumps, with or without load sensing, in a multiple pump circuit A rotary flow combiner allows flow from multiple pressure compensated hydraulic pumps; with or without load sensing to be combined into a single outlet. The flows are combined in such a way that each input to the rotary flow combiner has equal flow. The flow from ea... | 08/23/2005 |
| 6922992 | Hydraulic drive circuit with flow divider and bypass valve A hydraulic drive with a flow divider and a bypass wherein fluid can either be allowed to flow from a flow divider to hydraulic actuators in parallel or the fluid can be allowed to bypass the flow divider and flow directly to the hydraulic actuators in parallel.... | 08/02/2005 |
| 6912849 | Cylinder driving system and energy regenerating method thereof A cylinder driving system capable of reducing the number of hydraulic devices and the amount of energy loss and an energy regenerating method thereof are provided. To this end, the system includes i) a hydraulic cylinder, ii) a hydraulic pump having three suction/di... | 07/05/2005 |
| 6823671 | Free-piston unit for generating hydraulic energy The invention relates to a free-piston unit for pumping fluid from a low pressure to a high pressure. The free piston is displaced by a hydraulic part under the influence of the fluid pressure on a plunger which is connected to a combustion piston. The force exerted... | 11/30/2004 |
| 6732520 | Hydraulic system for a press Hydraulic systems are disclosed for operating a press comprising a press ram, a press cylinder including a primary side for activating the press ram and press ram return cylinders for returning the press ram, and at least one flow amplifier comprising a piston inclu... | 05/11/2004 |
| 6639211 | Contrast-enhanced MRA including an effective zero-latency method of bolus detection To generate a magnetic resonance angiograph, a patient is injected with a contrast-enhancing agent (210). An ellipsoidal central portion of k-space (300) and a first surrounding region (310) are continuously sampled (220). A portion of each central data s... | 10/28/2003 |
| 6589033 | Unitary sliding vane compressor-expander and electrical generation system The present invention provides a unitary sliding-vane type compressor-expander comprising a housing with a compressor inlet and outlet, and an expander inlet and outlet. A single rotor is disposed therein defining in cooperation with the housing a compres... | 07/08/2003 |
| 6584769 | Mobile working machine A hydraulic circuit for a mobile handling device includes a lifting cylinder suitable for handling a variable load and an accumulator for recovering or recycling lowering load energy. The hydraulic circuit also includes a variable hydraulic machine, drive... | 07/01/2003 |
| 6575076 | Hydraulic installations A hydraulic installation comprising a hydraulic motor for linearly or rotatively moving against a load, a first connection with a source of pressurized hydraulic fluid of mainly constant high pressure, a second connection with a source of pressurized hydr... | 06/10/2003 |
| 6460333 | Hydraulic pressure transformer A hydraulic pressure transformer has a port block which is attached to an end cap. The end cap includes a plurality of ports opening at an end face and at least one actuation port opening at or near a peripheral surface. A barrel which is rotatable about ... | 10/08/2002 |
| 6438951 | Hydraulic drive with regeneration circuit A hydraulic drive with regeneration circuit comprises a pump, a hydraulic actuator and a rotary flow divider which operates in conjunction with valve means to provide regeneration flow for the hydraulic drive.... | 08/27/2002 |
| 6378301 | Pressurized fluid recovery/reutilization system Energy of returning pressurized fluid of an actuator is recovered and reused as energy for operating other accumulators. A first pump motor (16) and a second pump motor (17) are mechanically connected to form a pressure converter (18), and a first circuit... | 04/30/2002 |
| 6374602 | Control system for a hydraulic transformer having variable pressure input A control system for a hydraulic transformer providing hydraulic pressure to a fluid actuator has a hydraulic system for providing a variable pressure input to the hydraulic transformer, and a controller connected to the hydraulic transformer and the hydr... | 04/23/2002 |
| 6370875 | Air powered hydraulic jack with load sensing auto shut-off air control The invention provides an improved fluid motor powered lift system having a valve arrangement for reducing or interrupting the fluid flow supplied to the motor when the pressure in the lift system exceeds a predetermined pressure. A valve arrangement is p... | 04/16/2002 |
| 6370873 | Hydraulic drive for a press A hydraulic drive for a press and in particular for a press for the simulation of the operating conditions of mechancial presses for large parts or the like is proposed. In order to also make such a hydraulic simulation press available for pilot lots or s... | 04/16/2002 |
| 6360536 | Control system for a hydraulic transformer A control system for a hydraulic transformer has a hydraulic system for providing hydraulic pressure to the hydraulic transformer, a controller connected to the hydraulic transformer, the controller for determining the input pressure provided to the hydra... | 03/26/2002 |
| 6349543 | Regenerative adaptive fluid motor control A regenerative adaptive fluid motor control system integrating a load adaptive fluid motor control system and a load adaptive energy regenerating system having an energy accumulator. The fluid motor control system includes a primary variable displacement ... | 02/26/2002 |
| 6286308 | Drive unit of cooling fan A discharged pressurized fluid of a primary hydraulic pump 2 driven by an engine 1 is supplied to an actuator 5 through an operating valve 4. A first hydraulic rotary machine 8 for rotating a cooling fan 7 is driven to rotate by a returning pressurized fl... | 09/11/2001 |
| 6223529 | Hydraulic system with a hydromotor fed by a hydraulic transformer A hydraulic system includes a hydraulic transformer with a rotor which is coupled with the hydromotor. The hydromotor may be subjected to a variable load which has to be moved in different directions. By using various switching means, the combination hydr... | 05/01/2001 |
| 6122913 | Drive for a mobile operating device A drive system for a mobile operating device. The drive system includes a drive motor driving a first variable-delivery hydraulic pump which is in fluid engagement with a first hydraulic motor, the first hydraulic motor being part of a hydraulic travellin... | 09/26/2000 |
| 6116138 | Pressure transformer The invention relates to a pressure transformer for the conversion of a hydraulic power from a first fluid flow having a first pressure into the hydraulic power of a second fluid flow having a second pressure. In the housing (3) a rotor (26) is mounted, a... | 09/12/2000 |
| 5878569 | Energy conversion system The energy conversion system of the subject invention converts the energy from a source of pressurized fluid, such as a free-piston engine and a storage accumulator, to a work system at various pressure levels. This is accomplished by providing power modi... | 03/09/1999 |
| 5794442 | Adaptive fluid motor control A regenerative adaptive fluid motor output feedback control system integrating a load adaptive fluid motor output feedback control system and a load adaptive energy regenerating system having an energy accumulator. The fluid motor control system includes ... | 08/18/1998 |
| 5794441 | Adaptive fluid feedback control A regenerative adaptive fluid motor position feedback control system integrating a load adaptive flujid motor position feedback system having an energy accumulator. the fluid motor control system includes a primary variable displacement pump powering a sp... | 08/18/1998 |
| 5794440 | Adaptive fluid control A regenerative adaptive fluid motor control system integrating a load adaptive fluid motor control system and a load adaptive energy regenerating system having a built-in regenerating circuitry containing an energy accumulator. The fluid motor control sys... | 08/18/1998 |
| 5794439 | Regenerative adaptive fluid control A regenerative adaptive fluid motor control system integrating a load adaptive fluid motor control system and a load adaptive energy regenerating system having an independent regenerating circuitry containing an energy accumulator. The fluid motor control... | 08/18/1998 |
| 5794438 | Adaptive fluid motor feedback control A regenerative adaptive fluid motor position feedback control system integrating a load adaptive fluid motor position feedback control system and a load adaptive energy regenerating system having an energy accumulator. The fluid motor control system inclu... | 08/18/1998 |
| 5794437 | Regenerative adaptive fluid motor control A regenerative adaptive fluid motor control system integrating a load adaptive fluid motor control system and a load adaptive energy regenerating system having an energy accumulator. The fluid motor control system includes a primary constant displacement ... | 08/18/1998 |
| 5324173 | High pressure intensifier A hydraulic pressure amplifier has a hydraulic motor for driving a single cam and follower in a piston chamber. A number of conduits and chambers with automatically actuated valves controlling the flow between them are provided, such that, in operation, l... | 06/28/1994 |
| 5319932 | Power sensing regenerator A power sensing regenerator includes a pair of displacers (24 and 26) connected in tandem for dividing a flow of fluid from a pump (12) into predetermined proportions for servicing one or more loads (42). Flow control valves (32 and 34) regulate respectiv... | 06/14/1994 |
| 5293745 | Fluid power regenerator A regenerator for a fluid power system is arranged to control flow rates while converting pressure drops accompanying resulting changes in flow rates into useful work. A gang of displacers are incorporated into a fluid flow network that also includes an a... | 03/15/1994 |
| 5265421 | Underwater hydraulic system for reducing liquidborne noise An hydraulic liquid system wherein a pump moves liquid from one location to another such as in supplying one or more loads in an underwater environment. The system includes two hydro-pneumatic chambers utilized such that one is filled by liquid from the p... | 11/30/1993 |
