An assembly of valve sections includes an inlet section, an outlet section, a working section, and a working section. The working section is a conventional pressure compensated working section. The working section includes a directional control valve, a pressure compensator valve, and a pressure limiter valve. The valves are of integral construction, such that each is an essential part to complete the other. The pressure compensator valve includes a pressure compensator spool movable between an opened position and a closed position in response to a pressure differential across the spool. The pressure limiter valve includes a pressure limiter spool that moves to an open position to change the pressure differential and close the pressure compensator valve when a selected limit pressure is reached.

A hydraulic system is provided, having a pump, operably connected to a motor. It also comprises a controller-driven hydraulic actuator, operably connected to the pump and a hydraulic valve, operable to direct hydraulic fluid to and from either a rod side or a cylinder side of the hydraulic actuator. Rod and cylinder side pressures are pre-defined based on the instantaneous acceleration or deceleration required. Decelerating the hydraulic actuator could involve maintaining the current pressure in the meter-out side of the hydraulic actuator and decreasing the current pressure in the meter-in side by varying the speed of the pump. Deceleration of the hydraulic actuator could also include decreasing pressure on the meter-in side of the hydraulic actuator at a higher rate than on the meter-out side. Acceleration is achieved using a similar approach.

A hydraulic actuator system including an actuator and a valve assembly configured for bi-directional regeneration. The actuator may include a hollow body and a rod disposed within and extending outwardly from the hollow body. The rod may include a first chamber within the rod and a piston disposed at one end of the rod, defining a second chamber and a third chamber within the hollow body. A valve assembly may be in fluid communication with a first conduit, a second conduit, the first chamber, the second chamber, and the third chamber, wherein the valve assembly is configured to selectively couple one of the first conduit and the second conduit to one or more of the first port, the second port, and the third port, wherein one of the first conduit and the second conduit is configured as a pressure source.

An apparatus comprising a downhole tool having a body defining an outer surface, a plurality of standoffs distributed about the outer surface, and a hydraulic circuit operatively coupled to the standoffs. The hydraulic circuit includes a plurality of hydraulically actuated pistons, each of which is operatively coupled to a respective one of the standoffs to extend and retract the respective standoff. The pistons are hydraulically coupled and sized to extend or retract the respective standoffs at substantially the same rate in response to a hydraulic control signal.

A hydraulic cylinder includes a cylinder assembly having a cylinder, defining an inner hydraulic chamber and being for reciprocating receipt of a piston and piston rod therein; a piston rod extending from the inner hydraulic chamber exteriorly of the cylinder; and a piston head assembly connected with the piston rod and disposed for reciprocation within the cylinder assembly. The piston head assembly includes a piston head and a valve assembly including a passageway defined in the piston head and a valve member having an outer surface and being sized and configured for reciprocation in the passageway between extended and retracted positions therein, the valve member defining at least one flat defined along the outer surface and at least one transition surface between the outer surface and the flat, the transition surface forming an angle with the flat of between about 40 and 50 degrees.

A foot actuated pivoting lever is provided. The lever may include: a lever member having two ends, one end configured to attach to a mechanism configured to receive an input from the lever member; and a pedal pivotally attached proximate to the other end of the lever member, wherein the pedal is configured to pivot between a first and a second position, wherein in the first position, the pedal lies on top of a section of the lever member and, in the second position, the pedal extends beyond the lever member. A mechanism for actuating a piston may be provided.

A dual-purpose hydraulic electric jack comprises a hydraulic lifting mechanism (1, 2), an oil pump (12), an oil tank (9), an oil conveying pipeline and an electric motor (14). The lifting mechanism, the oil pump and the oil tank are all connected with the oil conveying pipeline. A transmission mechanism is arranged between the oil pump and the electric motor. A one-way valve (10) is provided between the oil tank and the oil pump. The oil pump (12) is equipped on one end side of the electric motor (14), and an air pump (15) is equipped on the other end side of the electric motor (14). A transmission mechanism is arranged between the air pump and the electric motor. The air pump is communicated with an air conveying pipeline (35) and the electric motor is equipped with a trigger mechanism for controlling the connection of the electric motor with the transmission mechanism between the electric motor and the air pump or oil pump. The function of the hydraulic electric jack is enhanced greatly and the hydraulic electric jack is convenient to use.

A hydraulic jack attachment for quickly and safely jacking up high clearance objects in an efficient manner. The hydraulic jack attachment generally includes a base support adapted to be positioned underneath an object to be lifted. The base support includes a footing which includes one or more wheels to aid in repositioning the base support. A linkage tube is interlocked with a lifting member and positioned within the base support. A hydraulic jack may be placed into a lower end of the base support via an access opening. When the hydraulic jack is lifted, it will force the linkage tube and lifting tube upwards. A lifting head positioned on the upper end of the lifting tube will press against and force the object upwardly to jack the object up.

A hydraulic binder includes, in parts by mass: (a) from 20 to 60 parts of Portland clinker; (b) from 20 to 40 parts of slag; and (c) from 0 to 60 parts of inorganic material other than the clinker and the slag; the sum of (a), (b) and (c) being equal to 100 parts; which binder further includes a slag activator including, relative to 100 parts of the sum of (a) and (b): from 1.4 to 6.55 parts of alkali metal salt, expressed as equivalent-Na2O; and from 1.1 to 11.0 parts of calcium sulfate, expressed as SO3.

Aqueous binder compositions with reduced rates of salt precipitation are described. The compositions may include a carbohydrate and a sequestrant for sequestering one or more multivalent ions (e.g., Ca2+, Mg2+, Ba2+, Al3+, Fe2+, Fe3+, etc.). The sequestrant reduces a precipitation rate for the multivalent ions from the aqueous binder composition. Methods of reducing salt precipitation from a binder composition are also described. The methods may include the steps of providing an aqueous binder solution having one or more carbohydrates. They may also include adding a sequestrant for one or more multivalent ions to the aqueous binder solution. The sequestrant reduces a precipitation rate for the multivalent ions from the binder composition.

Non-aqueous hydraulic cement compositions comprise a non-aqueous mixture of a powder composition and a non-aqueous water-miscible liquid. In one embodiment, powder composition is a Brushite or Monetite-forming calcium phosphate powder composition. In another embodiment, the powder composition comprises porous β-tricalcium phosphate (β-TCP) granules and at least one additional calcium phosphate powder. In another embodiment, the powder composition comprises calcium silicate powder. In a further embodiment, the powder composition comprises calcium aluminate powder. In another embodiment, the powder composition is a cement composition and comprises nanopowders having a grain size of less than 1 micron. Hardened cements are formed from such hydraulic cement compositions, and methods of producing hardened cements, kits, and articles of manufacture employ such hydraulic cement compositions.

The present disclosure relates to a hydraulic braking apparatus for a crane drive for carrying out crane work, in particular a slewing gear, having at least one hydraulic stopping brake for braking the drive movement of the crane drive in an emergency situation, wherein at least one pressure regulation valve is provided for controlling at least one stopping brake to ensure a time-delayed braking torque build-up.

A rotary distributor device for a hydraulic power steering, which receives oil from a pump and sends the oil selectively to a discharge or to an actuator of the steering in a desired direction, comprises a jacket, a slide, sealedly rotating in the jacket, a series of openings that cross the wall of the jacket, located in front of a series of corresponding openings which cross the wall of the slide, elastic member located between the jacket and the slide configured to maintain the openings of the jacket at the openings of the slide, in which each opening in the jacket includes, in succession starting from the outside, at least one radial hole, a slot lying in a radial plane, arranged symmetrically with respect to the axis of the hole, the width being smaller than the diameter of the hole, and the depth being such as to intersect the hole.

The Invention provided is a hydraulic powered down hole reciprocating pump traveling valve component to provided lifting hydraulics on the down stroke using the derived motion and pressure of petroleum liquids and gasses, such as oil, water and natural gas and also utilizing the frictional traveling forces driven by the surface equipment. Designed to utilize the elements within the pumping apparatus to obtain the hydraulic power within and transfer the energy's force to the exposed bottom end of the pressure locked traveling ball valve adjacent within the ball valve containment cage, providing ultimate lifting power to open the ball valve on the initiation of the down stroke. The component consist of a Hollow Hydraulic Power Shaft, Hollow Pressure Motion House, and a Fluid Cavity Power Drag Plunger.

A hydraulic device having an input shaft and an output shaft, the device comprising: a housing having the input shaft mounted at one end and the output shaft mounted at the other end; an axially reciprocating hydraulic pump mounted on the input shaft within the housing, the axially reciprocating hydraulic pump having: a plurality of pistons located in respective piston bores and configured for axial reciprocation therein; a cam plate connected to the input shaft, the cam plate having a plurality of cam surfaces distributed about the cam plate for driving the plurality of pistons towards Top Dead Center (TDC) of the piston bores; a rotating hydraulic motor mounted on the output shaft within the housing for rotating with the output shaft; and a pair of shared fluid conduits, one of the pair directly and fluidly connecting a fluid outlet of the axially reciprocating hydraulic pump with a fluid inlet of the rotating hydraulic motor and the other of the pair for directly and fluidly connecting a fluid outlet of the rotating hydraulic motor with a fluid inlet of the axially reciprocating hydraulic pump, such that the pair are contained within the housing; wherein flow of hydraulic fluid between the axially reciprocating hydraulic pump and the rotating hydraulic motor bypasses any fluid reservoir external to the housing.

A submersible pumping system includes an electric motor and a pump driven by the electric motor. The pump includes a rotatable shaft driven by the motor, one or more piston assemblies configured for linear reciprocating motion and a mechanism for converting the rotational movement of the shaft to linear reciprocating movement in the piston assemblies. In one aspect, the mechanism for converting the rotational movement of the shaft includes a tilt disc assembly. In another aspect, the mechanism for converting the rotational movement of the shaft includes a camshaft assembly.

A concrete saw is disclosed having a rigid metal frame, a hydraulic drive system, a water-cooled hub, and an axially rotatable trigger assembly comprising a 12 volt switch. The saw may include a hydraulic pump operable to supply pressurized hydraulic fluid to the drive system. In some embodiments, the saw may includes a flow sharing valve fluidly coupled to the hydraulic drive system to distribute the pressurized hydraulic fluid from the a hydraulic pump in a portable power pack. A method of removing trip hazards with the saw is also disclosed.

This disclosure describes a simple, low cost method to produce a modular dry mix that can easily be modified and customized to produce a wide range of easy to aerate, no ice cream machine needed, ice cream and frozen dairy and non-dairy desserts and products made by this process. The method relies on successive simultaneous particle size reduction and blending steps without the use of traditional mix drying operations. The formulations produced by this process are modular and allow quick and simple ingredient substitutions to create distinct finished products. The process yields mixes that produce stronger, more stable foams that don't leave an oily mouth feel. The disclosure also includes a formulation and process used to make ice cream, and related frozen dairy and non-dairy desserts at room temperature in one step where the ingredients do not need to be aged, or homogenized, and aeration occurs without the need for simultaneous cooling or freezing. The process allows the end-user to control and vary the texture, freezing rate, melting point and eating qualities of the product without the use of traditional, home or industrial ice cream machines and a product made by this process. A product produced from this mix consists of a (protein-concentrate and emulsifier)—stabilized, protein-based foam created by combining a powder mix with one or a combination of a large range of above freezing temp liquids then immediately whisking the mixture at room temp to a target overrun without pre-aging, and then freezing that product statically till desired hardness is achieved. The main execution of this process involves the use of dry powders that are transported and sold dry and then reconstituted by the end user before they are combined without pre-treatment, freezing homogenization or aging. The manufacturing process offers significant advantages over current dry mix production methods which require significant upfront investment and produce hard to customize mixes. The formulation and finished product making portions of the invention offer significant improvement over existing manufacturing methods for frozen desserts and dessert mixes that require simultaneous freezing and aeration in terms of cost, convenience, customizability, shelf-stability and environmental impact.

A motor mounted on a structural support with a pivot at its center line which comprises a cylindrical vessel for holding a fluid in a closed system and in which a buoyant cylinder containing a lighter fluid is allowed to free float so that a cable attached to either end of the buoyant cylinder may be used to transfer energy to a energy storage unit, a crank or a generator. Two moment arms having a weight attached at the exterior end and inside attachably connected to the surface of two drive pistons that operate in pressure tanks which force a compressed gas against the pistons through pre-sequenced automatic activated valves to extend or retract the moment arms at the end of a cycle. The motor then becomes top heavy and rotates 180 degrees by gravity and relocks in place to repeat the cycle.

A fully hydraulic edging system suitable for use in wide plate mills is disclosed. The need for electro-mechanical screws to effect large movements of the side rollers is avoided by employing a pull-back hydraulic cylinder for this purpose. The main hydraulic cylinders are switched to a non-operational mode during large movements thus avoiding the need for large volumes of hydraulic fluid to be transferred under high pressure.

A method of using a hydraulically driven pressing device for pressing a fitting on a tube is provided. The pressing device includes a piston and a cylinder for acting on pressing jaws. A piston shaft is connected to rollers. The pressing device can be used to carry out pressing operations requiring different levels of pressing power, by using an adjustable stop which is provided in the direction of displacement of the piston in order to achieve different end positions for the piston during the piston return stroke.

A hydraulically installed tube plug with or without O.D surface enhancements and plug installation tooling, high pressure fluid system and method. The invention stops leaks in tubes with a plug that utilizes controlled high pressure fluid within the plug itself to radially expand the plug in place. Other plugs and plugging systems rely on mechanical methods for setting the plugs in the tubes with little or no control on the radial pressure applied to the tube. This lack of radial pressure control can result in a tubesheet ligament being over stressed (plastically deformed) or not enough pressure applied to stop the leak. The plug high pressure expansion tooling is designed with built in safety components that allow high pressure hydraulic expansion methods to be used safely in blind holes. The high pressure fluid system's design allows it to be used in hazardous environments.

The invention resides in a hydraulic cylinder (23) for a hydraulic drawing cushion (20) of a drawing press (10). The hydraulic cylinder (23) includes a first operating chamber (47), a second operating chamber (48), and a third operating chamber (53). An annular piston (45) with a first piston surface area (49) and a second piston surface area (50) separates the first operating chamber (47) from the second operating chamber (48). The first and the second piston surfaces (49, 50) have the same size. A front surface of the piston rod (33) forms a third piston surface (54) which is larger than the first and second piston surfaces. The third piston surface (54) delimits the third operating chamber (53) of the hydraulic cylinder (23). The first and the second operating chambers (47, 48) are provided for controlling the position and/or the movement of the piston rod (33). The third operating chamber (53) serves to control the metal sheet clamping force of the drawing press via the piston rod (33).

Disclosed is a work vehicle having a hydraulic apparatus which can reliably prevent erroneous operation of the valve of the hydraulic apparatus even when the operating lever is moved inadvertently. With this hydraulic apparatus, with operations of a single operating lever in two directions, two valves are operated respectively. Two valve operating links for operating the two valves respectively are pivotally supported to a support shaft provided to a pair of frame plates and a lock pin is provided to the frame plates. The two valve operating links form pin holes. When the two valves are at the neutral positions, the lock pin is inserted into the pin holes with a locking operation of a lock operating tool, thus fixing the valve operating links and locking the valves.

A hydraulic excavator includes a lower traveling unit, an upper revolving unit revolvably mounted on the lower traveling unit, a counterweight disposed on a rear end part of the upper revolving unit, an engine compartment disposed in front of the counterweight on the upper revolving unit, a cab disposed in front of the engine compartment on the upper revolving unit, an equipment compartment disposed between the engine compartment and the cab on the upper revolving unit, a pair of handrails and a pair of antenna supporting parts. The pair of handrails is disposed on the equipment compartment. The pair of antenna supporting parts is configured to support a pair of antennas. At least a portion of the pair of antenna supporting parts is disposed above the engine compartment. The pair of antenna supporting parts is connected to the pair of handrails.

A hydraulic excavator is provided with a lower traveling unit, an upper structure, an engine, a hydraulic pump, an engine compartment, a pump compartment and a plurality of filter devices. The upper structure is rotatably disposed on the lower traveling unit. The pump compartment provided on the upper structure for housing the hydraulic pump. The pump compartment has a door that allows access to an interior of the pump compartment. The filter devices, which are disposed adjacent to each other, are disposed at positions that are mutually offset in a height direction of the hydraulic excavator.

A hydraulic motor/pump regenerator system for recovering energy from the moving vehicle having high efficiency and precise control, thereby allowing the maximum amount of energy to be recovered and reused, is described. Three, fixed-displacement pump/motors are used to enable the system to recover and reapply energy at efficiencies expected to be above 70% in most circumstances. The invention is not limited to the use of three fixed displacement hydraulic units since using more units may in some drive cycles further improve efficiency. By selecting an appropriate combination of pump/motor units for providing the driveshaft torque required by the driver, embodiments of the present invention generate high recovery efficiency at any speed.

A hydraulic arrangement by which a plurality of shift rails of a transmission are actuated, including one double acting cylinder per shift rail by which the respective shift rail can be moved back and forth. A first hydraulic valve is connected upstream of the plurality of shift rails and has a first output and a second output, by which a first shift pressure and a second shift pressure for actuating the shift rails can be provided. A second hydraulic valve is connected between the first hydraulic valve and two of the shift rails, and by which it is selectively possible for the first output of the first hydraulic valve to be associated with one of the double acting cylinders of the two shift rails, and the second output of the first hydraulic valve to be associated with the other double acting cylinder of the two shift rails.

A hydraulic circuit includes a clutch actuator operatively associated with a clutch that may be disposed in a transmission. A hydraulic fluid source supplies pressurized hydraulic fluid for the clutch actuator. To measure the filling rate of the hydraulic actuator, a reference actuator having a predetermined filling rate is disposed in parallel with the hydraulic actuator and in fluid communication with the hydraulic fluid source. If hydraulic pressure associated with the reference actuator does not correspond to the hydraulic pressure associated with the clutch actuator, a compensation valve can appropriately respond by selectively directing hydraulic fluid to or from the clutch actuator. In a further embodiment, the reference actuator and compensation valve may be replaced with an electrohydraulic valve utilizing feedback from the hydraulic pressure present at the inlet of the clutch actuator.

A hydraulic circuit includes a clutch actuator operatively with a clutch that may be disposed in a transmission. A hydraulic fluid source supplies pressurized hydraulic fluid for the clutch actuator. An on-off valve is disposed in fluid communication between the clutch actuator and the hydraulic fluid source; the on-off valve configured to fill the clutch actuator with hydraulic fluid. An accumulator is disposed in parallel with the on-off valve and in fluid communication with the clutch actuator. The accumulator is adapted to receive hydraulic fluid redirected from the clutch actuator and to provide a counter-pressure for modulating the clutch actuator.

A hydraulic circuit supplies pressurized hydraulic fluid to and from a torque converter that is operatively associated with a lockup clutch. The torque converter is disposed upstream of an outlet regulator that maintains a predetermined pressure in the torque converter. Power transmission in a powertrain can be directed through the torque converter during a hydrodynamic mode and can be directed through the lockup clutch during lockup mode. To switch between the hydrodynamic mode and the lockup mode, the hydraulic circuit includes a diverter valve to selectively direct pressurized hydraulic fluid between the torque converter and the lockup clutch. When operating in the lockup mode, the diverter valve further diverts hydraulic fluid discharged for the torque converter to bypass the outlet regulator disposed downstream of the torque converter.

Systems and methods for dehydrating a natural gas stream are provided herein. The system includes a lean solvent feed system, including a line from a topsides facility, wherein the line is configured to divide a lean solvent stream to feed lean solvent to each of a number of co-current contacting systems in parallel. The co-current contacting systems are placed in series along a wet natural gas stream, wherein each of the co-current contacting systems is configured to contact the lean solvent stream with the wet natural gas stream to adsorb at least a portion of the water from the wet natural gas stream to form a dry natural gas stream. A rich solvent return system includes a line to combine rich solvent from each of the plurality of co-current contacting systems and return a rich solvent stream to the topsides facility.

The present invention relates to a dehydration composition and method of use thereof for drying gas streams, in particular natural gas streams, wherein the dehydration composition comprises one or more polyhydric alcohol. Said polyhydric alcohol preferably has a hydroxyl content equal to or greater than 31 percent and equal to or less than 75 percent of the formula weight of the compound. Said polyhydric alcohol dehydration compositions are particularly suitable for dewatering and desalting gas stream comprising water and one or more salt.

A method for mounting a flexible tube associated with braking hydraulics on a bicycle between a braking control member and a braking member. The method provides a mounting cable for use in locating the flexible tube within a bicycle frame element while the ends of the flexible tube are exposed so a respective end can be connected to the control member and the braking member. The method simplifies the insertion process and reduces damage to the flexible tube. A tool for inserting the flexible tube is also provided.

The present invention provides an improved, quantitative, standardized method of hydrating succulent plants by a plant owner. The method includes calculating the amount of water and watering frequency required, depending on environmental conditions, such as substrate used to grow a plant, relative humidity and temperature, and using a demarcated container for watering the plant, all of which maintains and prolongs the health, vitality, beauty and longevity of the succulent plant.

A cutting device includes a first part and a second part which is pivotably connected to the first part. A first fixing portion is located in the top side of the first part. The second part has a second fixing portion defined in the underside side thereof and facing the top side of the first part. The second fixing portion is located corresponding to the first fixing portion. A reception slot is defined axially in the second part and communicates with the second fixing portion and the underside of the second part. A blade is inserted into the reception slot. A hole is defined through the first part for receiving a hydraulic hose. A pressing member is pivotably located in a recess in one side of the first part and is able to press the hydraulic hose passing through the hole and the recess.

A process train for a floating production storage and offloading installation includes a crude oil storage tank that is equipped with at least one set of electrostatic internals arranged to provide a treatment flow path isolated from a surrounding volume of the electrostatic separator section of the tank. An oil-and-water stream or mixture entering the set of electrostatic internals travels along the treatment flow path and is subjected to an electric field. The treatment flow path is in an upwardly direction toward the oil outlet section and in a downwardly opposite direction toward the water outlet section of the tank. Employing electrostatic internals within the tank permits an allowable inlet water content into the tank of up to 80%, significantly reducing the required topside processing equipment.

A process train for a floating production storage and offloading installation includes a crude oil storage tank equipped with at least one set of electrostatic internals. The set of electrostatic internals are arranged to provide a treatment flow path within the crude oil storage tank oblique to a longitudinal centerline of the crude oil storage tank and through an electric field provided by the set of electrostatic internals. Employing these electrostatic internals within the tank permits an allowable inlet water content into the tank of up to 80%, significantly reducing the required topside processing equipment. The process and system also includes, upstream of the tank, two separator vessels arranged in parallel so each receives a portion of an incoming oil-and-water stream, a flash vessel arranged downstream of the two separator vessels, and a degasser vessel. Downstream of the crude oil storage tank is an electrostatic treater.

Methods for producing alcohols and oligomers contemporaneously from a hydrocarbon feed containing mixed butenes using an acid based catalyst are provided. Additionally, methods for producing fuel compositions having alcohols and oligomers prepared from mixed olefins are also provided as embodiments of the present invention. In certain embodiments, the catalyst can include a dual phase catalyst system that includes a water soluble acid catalyst and a solid acid catalyst.

One embodiment provides a hydraulic pressure generation apparatus. In the hydraulic pressure generation apparatus, a motor attached to a base body. The base body includes: a first cylinder hole having a closed bottom in which a first piston is inserted to thereby form a master cylinder; and a second cylinder hole having a closed bottom in which a second piston is inserted to thereby form a slave cylinder. The first cylinder hole and the second cylinder hole have respective openings in a surface of the base body located on one side thereof. Axial lines of the first cylinder hole, the second cylinder hole and an output shaft of the motor are arranged approximately parallel with each other.

A method for operating a stationary gas turbine at partial load, having at least one compressor, at least one expansion turbine and a combustion chamber provided with at least one burner, which gas turbine further includes a hydraulic gap adjuster, wherein the method has the following steps: operating the gas turbine at partial load; operating the a hydraulic gap adjuster; during the operation of the hydraulic gap adjuster, increasing the fuel supply to the burner while increasing the temperature of the combustion gases which are guided to the expansion turbine.

A submersible pumping system has an electric motor, a rotary hydraulic pump driven by the electric motor, and a linear hydraulic pump that is configured to move a production fluid. The rotary hydraulic pump produces a pressurized working fluid that drives the linear hydraulic pump. In another aspect, a method is disclosed for controlling the temperature of an electric motor within a submersible pumping system disposed in a wellbore. The method includes the steps of circulating motor lubricant through a hydraulically driven production pump to reduce the temperature of the motor lubricant.

A hydraulic system for a work machine includes a first control valve including a first direction switch to switch a direction in which the operation fluid is to flow through a first hydraulic actuator and a pressure compensator to maintain a differential pressure to a constant pressure, the differential pressure being a difference between a pressure of the operation fluid to be inputted to the pressure compensator and a pressure of the operation fluid to be outputted from the pressure compensator. And, the hydraulic system includes a second control valve including a second direction switch to switch a direction in which the operation fluid is to flow through a second hydraulic actuator and a flow rate prioritizer to prioritize a flow rate of the operation fluid to be outputted to the second hydraulic actuator.

A hydraulic drive system includes an oil supply device, an oil return device and a hydraulic cylinder circuit component. The circuit component includes a hydraulic cylinder, a first and a second two-position two-way electromagnetic directional valves. The cylinder includes a first chamber and a second chamber that has a piston rod. A first port of the first valve connects with the first chamber and a first port of the second valve connects with the second chamber. When the oil supply device connects to a second port of the first valve and a second port of the second valve connects to the oil return device, the piston rod is extended outwards. When the oil supply device connects to the second port of the second valve and the second port of the first valve connects to the oil return device, the piston rod is retracted.

An electro-hydraulic actuation system includes a regeneration valve in fluid communication with a first fluid chamber and a second fluid chamber of a hydraulic actuator, and a dump valve is in fluid communication with the second fluid chamber and a fluid reservoir. A pump provides a flow of fluid to the first and second fluid chambers, a displacement of the pump controlling a velocity of the actuator during motion in the retraction and extension directions. An electric motor drives the pump, and a controller controls a state of the regeneration valve and the dump valve. At least one feedback device senses a system condition and provides a respective feedback signal indicative of the sensed system condition to the controller, the controller responsive to the feedback signal to determine an occurrence of an over-center load condition and control a state of the regeneration valve and the dump valve in response to the occurrence to maintain the velocity of the actuator.

Like everyone else, my hands have taking a true beating from hand sanitiser, hand wash and cleaning products throughout this pandemic.

During self-isolation due to COVID-19 my teaching has moved online affording me more time toward individual projects. I had already started a building a morphing editor for the Ashun Sound Machines Hydrasynth, so this is where I have been directing … Continue reading →

(WV Supreme Court of Appeals) - No. 18-0653

Компания Precision Hydration, помогающая спортсменам избежать обезвоживания, станет партнёром и официальным поставщиком команды Williams.

Roles and Responsibilities: Responsible for engineering, scheduling, managing and performing product qualification for hydraulic components. Manage and oversee qualification test projects for a variety of hydraulic components (hose assemblies, fittings, tube assembles, valves, etc) Principal