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| Number | Title | Issue Date |
| 8087241 | Compressed air energy storage system utilizing two-phase flow to facilitate heat exchange A compressed-air energy storage system according to embodiments of the present invention comprises a reversible mechanism to compress and expand air, one or more compressed air storage tanks, a control system, one or more heat exchangers, and, in certain embodiments... | 01/03/2012 |
| 8037679 | Compressed air energy storage system utilizing two-phase flow to facilitate heat exchange A compressed-air energy storage system according to embodiments of the present invention comprises a reversible mechanism to compress and expand air, one or more compressed air storage tanks, a control system, one or more heat exchangers, and, in certain embodiments... | 10/18/2011 |
| 7395748 | Hydraulic drive for displacing an actuator A hydraulic drive is described for displacing an actuator (7) between two predetermined end positions, comprising a piston unit (4) which can be pressurized in a cylinder unit (3) in opposite directions by way of hydraulic springs and a control ... | 07/08/2008 |
| 7377492 | Hydraulic liquid pumping system A system for concentrating gas, using the concentrated gas to pump liquid, and recycling the gas and liquid is disclosed. The system comprises a body of liquid, a down pipe in fluid communication with the body of liquid, a gas injection apparatus for introducing gas... | 05/27/2008 |
| 7370568 | Method and apparatus for angularly positioning a shaker separator bed An apparatus for angularly positioning a shaker bed, including a discharge end, includes an air source providing pressurized air, an hydraulic tank in selective communication with the air source and containing a quantity of fluid, at least one bellow in selective fl... | 05/13/2008 |
| 7249458 | Self-contained hydraulic actuator system The hydraulic linear actuator system of the present invention includes a pump that is configured to rotate in a single direction at a substantially constant velocity. Both the direction and flow rate of fluid through the system is controlled by adjusting the positio... | 07/31/2007 |
| 7174710 | Nelson flywheel power plant improvement An improvement to the Nelson Flywheel Power Plant comprising a piston (100 and 101) in each outer chamber (40 and 41) situated at the interface of the compressible fluid and incompressible fluid (120) and slidably adjoining the cen... | 02/13/2007 |
| 7147078 | Charging a fluid accumulator while operating a hybrid vehicle powertrain including an engine and a pump/motor A system for replenishing a source of pressurized fluid for use in driving the wheels of a motor vehicle includes an accumulator containing fluid at relatively high pressure; a reservoir containing fluid at lower pressure; an engine driveably connected to the wheels... | 12/12/2006 |
| 7113850 | Method and apparatus for active acoustic damping motor control Active acoustic damping is provided with a motor or similar propulsive element such as a multi-phase brushless direct current (DC) motor. To produce the appropriate canceling effect with the motor, the relationship between the operating mode of the motor and the noi... | 09/26/2006 |
| 7104052 | Hydraulic cylinder with integrated accumulator A hydraulic cylinder assembly includes a hydraulic cylinder and an integral concentric accumulator. The hydraulic cylinder has a first piston surface for extending the cylinder, a second piston surface for retracting the cylinder and a third piston surface in dedica... | 09/12/2006 |
| 7100372 | Vehicle air compressor device The present invention provides a vehicle air compressor device which includes a motor device serving as a driving power source, and a drier device that conducts compressed air; the drier device arranged opposite to the motor device; and a supporting member for suppo... | 09/05/2006 |
| 7028934 | Vertical roller mill with improved hydro-pneumatic loading system An accumulator assembly comprising at least two accumulators that are hydraulically interconnected to the same source of hydraulic fluid. Each accumulator containing an energy absorbing medium which is compressible when a movable barrier which separates the hydrauli... | 04/18/2006 |
| 7021602 | Valve, actuator and control system therefor A hydraulic control system for a valve actuator comprising a first control valve that regulates fluid communication from a fluid pressure source to a first fluid supply tank that is fluidly connected to the valve actuator. A second control valve regulates fluid comm... | 04/04/2006 |
| 7004060 | Balancing vertical load device for a motor A balancing vertical load device for a motor, to be used in conjunction with a vertical driving device with a force- and position-controlled motor, comprising a motor assembly and a sealed air pressure system. The motor assembly has a motor, and a load weight which,... | 02/28/2006 |
| 6983592 | Mobile working machine The present invention relates to a mobile handling arrangement with hydraulic circuit, forming part of which hydraulic part of which hydraulic circuit (L) is a lifting cylinder (1) arranged in a lifting arrangement (100) made for handling a variable lo... | 01/10/2006 |
| 6944529 | Automatic fluid draining from a hydraulic system component of an automatic transmission In a hydraulic system for an automatic transmission, a method for automatically draining fluid from an oil cooler and related hydraulic lines when power is off to prevent fluid leakage, escape and outflow when they are disconnected from the system. A control system ... | 09/13/2005 |
| 6929087 | Hydraulic power steering system utilizing fuel as a working fluid A hydraulic power steering system for a diesel-fueled truck utilizes vehicle fuel as a working fluid. The steering system includes a power steering gear connected to the steerable wheels of the truck. A first pump flows fuel from the truck's fuel tank to both the st... | 08/16/2005 |
| 6481329 | System for remote control and operation A system for remotely controlling an undersea device. The system employs a gas-pressurized liquid reservoir that can be recharged from at least one replaceable gas bottle. A pressure-regulating valve is employed to control the pressure of the liquid leavi... | 11/19/2002 |
| 6266959 | Device for saving energy A device to save energy for hydraulically-operated tool shanks uses a piston-type accumulator having a housing in which at least two longitudinally displaceable pistons are arranged and are connected to by a coupling part. The coupling part is guided to b... | 07/31/2001 |
| 6266590 | Pneumatic suspension leveling system for vehicles It is proposed that a pneumatic suspension leveling system for vehicles with pneumatic suspension leveling elements assigned to the vehicle axles and/or vehicle wheels, with a compressor and a central pressure accumulator fed by it for the compressed air ... | 07/24/2001 |
| 6070408 | Hydraulic apparatus with improved accumulator for reduced pressure pulsation and method of operating the same Hydraulic apparatus including hydraulic supply means and an accumulator with an accumulator piston and a means for sensing the accumulator piston position to indicate a load requirement to a control means to selectively actuate the hydraulic supply means ... | 06/06/2000 |
| 6041597 | Pneumatic/hydraulic balance weight system for mother machines A balance weight system for a unit includes a cylinder and a piston rod having a first end secured to the unit to move therewith. The piston rod further includes a second end with a piston head slidably received in the cylinder and separating the cylinder... | 03/28/2000 |
| 6006520 | Pneumatic assisted brake apply system A brake apply system includes a power booster in which, when released and at-rest, a leg of a stop engages a clip and an extension of a valve body engages the clip so that an annular rib of the valve body is axially spaced away from the stop by a distance... | 12/28/1999 |
| 5797583 | Valve driving apparatus A valve driving apparatus for actuating a shut-off valve provided in a pipeline conveying a fluid includes a gas/oil booster having an oil chamber and a gas chamber. A valve-driving actuator has a cylinder connected to the oil chamber of the booster, and ... | 08/25/1998 |
| 5553454 | Compressed air engine system and method for generating electrical energy from the controlled release of compressed air A system and method is provided for generating electrical energy by operatively connecting a generator to a drive shaft which is rotated axially when fan turbines connected to the drive shaft are rotated. The turbines are rotated by directing the release ... | 09/10/1996 |
| 5507144 | Lightweight, safe hydraulic power system and a method of operation thereof A hydraulic accumulator system alternately stores energy in the form of gas pressure and converts the stored energy into work by gas expansion. The hydraulic accumulator system, by connection to drive wheels of a vehicle, can serve as a hydropneumatic pow... | 04/16/1996 |
| 5477674 | Underwater hydraulic system for reducing pump noise A hydraulic system which includes a pump for supplying hydraulic fluid to a load by a fluid supply line and receiving hydraulic fluid from the load by means of a fluid return line. The pump, as well as a drive motor therefore is enclosed within a pressure... | 12/26/1995 |
| 5467596 | Unitary electro-hydraulic rotary actuator for automotive convertible top A self-contained rotary actuator assembly has a pump assembly, a precharged hydraulic circuit, and a rotary vane actuator in a single unit. The pump assembly is a bi-directional electric motor driven gerotor pump which is manifolded to a module assembly i... | 11/21/1995 |
| 5417063 | Underwater hydraulic system for reducing pump noise A hydraulic system which includes a pump for supplying hydraulic fluid to a load and receiving hydraulic fluid therefrom wherein the pump is acoustically isolated from the surrounding water medium. The pump and a motor which drives the pump is enclosed in... | 05/23/1995 |
| 5240096 | Fluid pressure circuit A fluid pressure circuit for an automatic transmission allows a single accumulator to selectively provide a plurality of pressure adjustment characteristics. The fluid pressure circuit includes a directional control valve responsive to a value of a revers... | 08/31/1993 |
| 5184535 | Speed control device for a pneumatic cylinder A speed control device for a pneumatic cylinder of the invention is characterized in that a speed control of the pneumatic cylinder can be changed from air pressure to air mass flow by a two-way valve and an airflow control valve. Therefore, an ordinary a... | 02/09/1993 |
| 5167292 | Motive power unit for driving a hydrostatic transmission coupled to an internal combustion engine Motive power unit comprising an internal combustion engine associated with a hydrostatic transmission, in particular for fitting to an automobile vehicle. In accordance with the invention, the motive power unit comprises an internal combustion engine (60)... | 12/01/1992 |
| 5138933 | Activator device for movable components An actuator device for mechanisms located within a pressurized environment including a double acting piston and cylinder combination operating in the same environment. The motive power for the piston is provided by pressurized gas from the pressurized env... | 08/18/1992 |
| 5116188 | Vibration suppressing device for wheeled construction equipment A vibration suppressing device for a wheeled construction equipment having a wheeled chassis, a working device operatively supported on the wheeled chassis, and a hydraulic circuit including hydraulic actuators for operating the working device for up-and-... | 05/26/1992 |
| 5102161 | Semi-active suspension system with energy saving valve A suspension system for a vehicle comprises at least one adjustable wheel corner, each adjustable corner including a linear actuator operatively connected between a sprung mass and an unsprung mass of the vehicle. The linear actuator is actively movable i... | 04/07/1992 |
| 5036661 | Regulated level accumulator for liquid under high pressure The accumulator comprises a vessel which is in communication with a hydraulic circuit and which contains a liquid occupying a portion of the space inside the vessel. The level of the liquid contained in the vessel is regulated by controlling the volume of... | 08/06/1991 |
| 5017099 | Fluid regulator valve An energy saving vacuum/pressure regulator is installed between a pump and a load for the pump, such as a storage tank, and relieves the load on the pump when the fluid in the load has reached a desired pressure state. The pressure state can be either neg... | 05/21/1991 |
| 5009066 | Automotive power steering system An automotive power steering system having a gas pressurized oil reservoir. A gas chamber is defined within the oil reservoir above the surface level of the oil therein. The surface level and volume of the gas chamber vary as the temperature of the oil ch... | 04/23/1991 |
| 4959958 | Hydraulic pressure system A hydraulic pressure system for supplying a fluid under pressure includes a fluid pressure source for supplying the fluid pressure, an accumulator for storing part of the fluid from the fluid pressure source, the accumulator having a gas chamber filled wi... | 10/02/1990 |
| 4757960 | Lost-fluid hydraulic actuation system Lost-fluid hydraulic actuation system. This system makes it possible to control for a short time an element (168) in an autonomous working unit, particularly a rocket, with an onboard means (100) connected to the unit. Hydraulic fluid under pressure is in... | 07/19/1988 |
