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8578838 Lock valve with grooved porting in bore  
A lock valve includes a lock valve body having a bore with a valve spool reciprocatingly received therein. There is a check valve adjacent each end of the bore. Each of the check valves has a...
8578712 Method for calibrating pneumatic actuators and calibrated actuator obtainable with this method  
A method for calibrating pneumatic actuators comprising a containment structure (2) in which a diaphragm (4) is mounted which delimits a variable-volume chamber (5) whose internal pressure may be...
8573558 Pneumatic actuator air flow control system  
A pneumatic actuator air flow control system includes a pneumatic rotary actuator (PRA) and a solenoid air flow control valve (SAFCV). The PRA contains an air reservoir and a vane housing allowing...
8572959 Systems, methods and devices for the management of heat removal within a compression and/or expansion device or system  
Systems, methods and devices for optimizing heat transfer within a device or system used to compress and/or expand a gas, such as air, are described herein. In some embodiments, a compressed air...
8573111 Active implement down force system with automatic latching of tractor power beyond pressure  
A load sense connection is provided between the implement rockshaft cylinders and the load-sensed power source. However, to avoid tractor starting difficulty, a valve structure is provided in the...
8577560 Controller of hybrid construction machine  
An efficient use of discharged energy of a boom cylinder is provided. A control unit has a function of receiving an output signal from a sensor provided in a boom operated valve and determining a...
8573560 Vacuum control valve and vacuum control system  
The invention provides a vacuum control valve configured to control the vacuum pressure in the vacuum chamber. The vacuum control valve includes a control valve main body, an operation unit, a...
8567302 Compressed gas operated instrument, in particular a surgical instrument  
A compressed gas operated instrument incorporating a connector for a compressed gas cartridge to which the compressed gas cartridge is connectable in sealed manner by means of a supply channel for...
8562307 Pump equipment  
An electrical signal input type displacement control device capable of reducing pipes on hydraulic equipment, and hydraulic equipment including the same. The pump equipment includes two the pump...
8561520 Brake servo  
A brake servo whose valve piston has a concentric sealing seat which projects axially beyond a second sealing seat, with the concentric sealing seat having at least one recess for throttling the...
8555772 Directional control valve, particularly for controlling an actuating cylinder of a turbo-machine  
A directional control valve including a force-regulated magnet, a control piston, an actuating piston, first and second elastic elements and a conductor. The control piston is displaceable using...
8555635 Hydraulic system for synchronizing a plurality of pistons and an associated method  
A hydraulic system for use with a pressurized fluid includes a first cylinder and a second cylinder. A flow path links the first and second cylinders in fluid communication with each other. A...
8550794 Double acting fluid pump  
A double acting dual stroke fluid pump with pressure assists is disclosed. First and second pistons are mounted to a common shaft which reciprocates within first and second cavities during...
8549984 Apparatus to increase a force of an actuator having an override apparatus  
Apparatus to increase a force of an actuator having an override apparatus are described herein. An example fluid control system includes a first fluid control apparatus to fluidly couple a control...
8549983 Hydraulic drive, in particular for machine tools, and method for controlling the hydraulic drive  
Provided is a hydraulic drive including a double-acting work cylinder with a piston having a first working surface effective in a retracting direction and a second working surface effective in an...
8544378 Hydraulic system for construction equipment having float function  
A hydraulic system for construction equipment having a float function is provided. The hydraulic system can perform ground leveling as making a boom descend due to its own weight without using...
8544263 Construction equipment having electric control lever  
Construction equipment having an electric control lever is provided, which can intercept a control signal applied to a flow control valve when trouble occurs in the electric control lever or a...
8548693 Control device and control method for working mechanism of construction vehicle  
A control device for a work machine on a construction vehicle is provided so that a bucket cylinder is stopped at a target position, with high accuracy achieved in a bucket cylinder length, and...
8548705 Method for controlling an automated clutch  
A method for controlling an automated clutch, which comprises a hydraulic clutch actuating system having a hydrostatic actuator, the pressure of which is detected. The method includes using the...
8539763 Systems and methods for efficient two-phase heat transfer in compressed-air energy storage systems  
In various embodiments, foam is compressed to store energy and/or expanded to recover energy.
8539762 Hydraulic control circuit for construction machine  
A hydraulic control circuit includes a hydraulic cylinder, a control valve, a recovery oil passage, a hydraulic pump, an engine rotation speed setting unit, a recovery control valve, and a...
8534182 Valvetrain oil control system and oil control valve  
A hydraulic control system includes an oil control valve to control oil flow within a valvetrain. The control valve varies the flow rate to actuate an engine component from a first position to a...
8528461 Force actuator  
Actuator arrangements are disclosed. An actuator arrangement can include a first fluidic-based actuator device designed to exert a first force on a first location of a body associated with the...
8528460 Hydraulic valve arrangement  
The invention concerns a hydraulic valve arrangement (1) with a supply connection arrangement comprising a high-pressure connection (P) and a low-pressure connection (T), a working connection...
8528459 Cushioning system for pneumatic cylinder of differential engine  
A cushioning system for a pneumatic cylinder powered differential engine door opening and closing device for use in passenger transportation vehicles wherein the cushioning initiation point can be...
8522432 Method of manufacturing a piston for a hydraulic motor having radial pistons  
A method for manufacturing radial pistons for a hydraulic motor by machining cylindrical transverse holes at regular intervals in a bar, and, in order to form two adjacent pistons, cutting up the...
8523139 Selector valve operating mechanism for working vehicle  
A selector valve operating mechanism is provided with operating pistons which are hydraulic pistons connected through an operation link to a spool of a PTO selector valve, an solenoid valve for...
8517695 Variable displacement swash plate type compressor  
Provides is a variable displacement swash plate type compressor comprising a drive shaft, a lug plate fixedly installed at one side of the drive shaft, a swash plate dispose at another side of the...
8516945 Piston-cylinder unit  
The present invention relates to a piston-cylinder unit with a piston with adjoining piston rod, which is movably mounted in a cylinder, wherein the piston and the piston rod have a cavity into...
8516944 Valve arrangement having individual pressure scale and load-lowering valve  
The invention discloses a valve arrangement for supplying pressure medium to a hydraulic load (2) having a directional valve (8), which has an inflow measuring diaphragm (10, 12) and a directional...
8511216 Hydraulic actuator unit  
A hydraulic actuator unit includes a first electric motor assembly formed by mounting one of a pair of electric motors to one of a pair of electric motor covers, wherein the first electric motor...
8513582 Method for stepping a first member relative to a second member associated with a projectile  
A method for stepping a first member relative to a second member associated with a projectile. The method including: providing one of the first and second members with one of a plurality of...
8505435 Travel limiting element in a brake servo device and brake servo device  
The invention relates to a travel limiting element in a brake booster device for a motor vehicle brake system, comprising a pair of longitudinal legs which are connected together via at least one...
8505436 Pneumatic actuator with a position control and position adjustment  
A proportional actuator valve (110) adapted for position control and position adjustment is provided. The proportional actuator valve (110) includes a valve housing (112) having at least two...
8505291 Hydraulic system having load sensing capabilities  
An exemplary hydraulic system includes a digital valve operable to fluidly connect a hydraulic load to a pressure supply, and an orifice disposed in a flow path between the hydraulic load and the...
8505581 Pressure compensated electromagnetic proportional directional flow control valve  
A pressure compensated electromagnetic proportional directional flow control valve of the present invention integrally includes: an electromagnetic proportional directional flow control valve...
8499552 Method and hydraulic control system for supplying pressure medium to at least one hydraulic consumer  
The invention relates to a hydraulic control arrangement and to a method for controlling a hydraulic consumer that comprises a pressure chamber on the input side and on the return side, said...
8499553 Piston type pneumatic engine  
A piston type pneumatic engine, including a cylinder block, a piston, a cylinder, a crankshaft, a connecting rod, a camshaft, and a device for controlling the opening or closing of a gas valve. A...
8495947 Hydraulic cylinder  
An object of the present invention is to provide a hydraulic cylinder enabling a reduction in a stress generated by the pressure of hydraulic fluid at a welded portion of a case containing a...
8485087 Fluid distributor apparatus and punching method  
A fluid distributor apparatus includes a body having distribution ports; a spool adapted for controlling the distribution ports and mounted slidingly in a first sliding seat obtained in the body...
8479769 Hydraulic valve device  
A hydraulic valve device, especially an LS current regulating valve, includes a fluid connection arrangement (10). As the respective control device (14) associated with a useful connection (A)...
8479636 Valve arrangement  
A valve arrangement has an adjustable control valve (10) including a control slide (12) for actuating at least one consumer connection (A, B) and an LS control line. The differential pressure of...
8479504 Hydraulic system having an external pressure compensator  
A hydraulic system for a machine is disclosed. The hydraulic system has a source of pressurized fluid and a fluid actuator with a first chamber. The hydraulic system also has a first valve...
8474486 Actuator system  
An actuator system (14) comprising a valve assembly (40) having an inner spool (50), an outer spool (60), and a sleeve (70). An assembly (80) directly drives the inner spool (50) to move it...
8474363 Axial piston and valve shaft fluid engine  
Systems and methods for implementing a uniflow fluid engine having at least one cylinder having at least one high-pressure input and at least one low-pressure output. In some embodiments, the...
8474364 Hydraulic system including priority based valve sequencing  
An exemplary hydraulic system includes a plurality of digital valves, each valve fluidly connectable to a corresponding hydraulic load. The digitals valves are operable to fluidly connect the...
8468931 Electro-mechanical control system for positioning fluid motors  
A fluid motor and a control system that includes an electronic controller and a mechanical servo to position a fluid motor. The electronic controller is combined with a non-electronic self storing...
8468815 Energy storage and generation systems and methods using coupled cylinder assemblies  
In various embodiments, cylinder assemblies are coupled in series pneumatically, thereby reducing a range of force produced by or acting on the cylinder assemblies during expansion or compression...
8469680 Valve body for pumps  
A valve body for pumps has a compressed air-filled chamber in the center thereof and a compressed air supply port through which compressed air is supplied into the compressed air-filled chamber....
8464525 Subsea power fluid recovery systems  
Systems and methods for recovering power fluid used to power a device under water and for pumping the recovered power fluid to a fluid container above a surface of the water, the method in certain...