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7950320 Brake booster for motor vehicles  
Disclosed is a brake booster for motor vehicles, the control valve (12) of which is operable, irrespective of an actuating rod (7) that displaces a valve piston (9), via an electromagnet (20),...
7946215 Actuator controller  
Actuator controller comprising a body (12) with an inlet port (14) coupled to a source of pressurized fluid and in flow communication with primary and secondary spool bores (16, 20); primary and...
7930969 Brake booster with dual rate assist  
A boosted brake having a booster with a decompression arrangement wherein an output push rod has a head with a plurality of openings that extend into a stem and create a plurality of arcuate...
7930970 Control unit for work machine  
A control unit for a work machine that allows automatically obtaining optimal operability even when the weight of a work arm in the work machine is changed. In a work machine where at least a part...
7926409 Valve cluster  
A valve cluster comprises several valve modules arranged in row direction adjacent to each other for the fluid power control of fluid power device, and at least one fluid power device coupled with...
7926269 Method for controlling a dynamic system  
A method for providing a controlled force to a dynamic system includes applying a force to a first actuator, transmitting the force from the first actuator to a second actuator through a closed...
7926411 Valve control unit  
A valve control unit that prevents a decline in interlocking operation performance when pilot pressure control of a plurality of pilot-operated control valves is carried out by proportional...
7926410 Hydraulic circuit for synchronized horizontal extension of cylinders  
A hydraulic system for synchronized movement of multiple cylinders in a horizontal plane includes a bidirectional pump, a shuttle valve cross-connected between pump outlets, flow-control check...
7927060 Priority hydraulic flow diverter control assembly  
A priority hydraulic flow diverter control assembly for a refuse collection vehicle hydraulic system provides proper and efficient flow in an auxiliary hydraulic circuit regardless of the primary...
7927245 Hydraulic motor apparatus  
A hydraulic motor assembly having a motor and gear reduction set mounted in a housing. The housing may be formed of separate components, including the external surface of the ring gear and the...
7921763 Braking control system comprising a force-control simulator  
The invention relates to a brake control system for motor vehicles comprising a brake pedal (1), a brake booster (4), a brake master cylinder (5). The system of the invention further comprises a...
7921689 Pneumatic biasing of a linear actuator and implementations thereof  
An improved method and apparatus are provided for constructing and operating a linear actuator, and equipment incorporating a linear actuator, by operatively connecting a pressure biasing pneumatic...
7921764 Hydraulic control device of working machine  
A rotation prioritizing valve serving as a flow rate control valve of a hydraulic pilot type is provided on the meter-in side of an arm cylinder. At the time of a combined operation of arm pulling...
7913491 Hydraulic flow control system and method  
Apparatus and methods are provided for controlling a double-acting hydraulic cylinder during a load-induced rod-extending operation. The apparatus includes a activation circuit and valve for...
7913612 Actuator control device  
In an actuator control device that controls an expansion/contraction operation of a hydraulic cylinder, when a main spool 52 is switched to a discharge position for discharging working fluid in the...
7908852 Control system for recovering swing motor kinetic energy  
This disclosure relates to a hydraulic system and method that converts the kinetic energy generated by the operation of a swing motor into hydraulic potential energy and reuses the hydraulic...
7905711 Multiple pump unit  
There is provided a multiple pump unit including a pump shaft, a first pump, a pump housing, a second pump and a fluid passage block connected to one end surface in an axis line direction of the...
7900549 Cushion ring and fluid-pressure cylinder  
A cushion ring which is used between a rod-side cylinder head and a piston rod of a fluid-pressure cylinder and which is externally fitted on the piston rod to cushion a shock in the vicinity of...
7895833 Hydraulic drive apparatus  
A hydraulic drive system is mounted on a hydraulic excavator, and is provided with a directional control valve 23 for a boom, a directional control valve 24 for an arm, a boom control device 25 for...
7886652 Positioning control mechanism for single-acting air cylinder  
An electromagnetic operation-type automatic pressure-adjusting valve outputting an air pressure corresponding to an amount of electric power is connected in an air flow path connecting a pressure...
7887302 High pressure variable displacement piston pump  
A variable flow pump includes: a housing with inlet and outlet chambers interconnected by a main bore and a non-rotating cylinder block positioned in the main bore. The cylinder block includes: a...
7882778 Hydraulic actuator with floating pistons  
A hydraulic actuator is configured to provide redundant boost control to an aircraft within approximately the same space required by a single hydraulic cylinder. The hydraulic actuator includes a...
7882777 Hydraulic pressure control apparatus and hydraulic circuit  
A supply passage, a discharge passage, an actuator passage, and a spool bore are defined in a housing. The spool bore accommodates a spool and communicates with the supply passage, the discharge...
7878422 Variable dampening rate suspension system  
A variable rate suspension system for a boom sprayer including a lift assembly and chassis. The suspension system includes a needle valve fluidly connected to a hydraulic accumulator and a first...
7877997 Wastegate control system based on variable valve actuation  
A hydraulically operated wastegate valve control system for a turbocharged internal combustion engine is disclosed. The control system includes a hydraulically operated wastegate valve configured...
7878263 Pressure-fluid-operated percussion device  
A pressure-fluid-operated percussion device includes a frame allowing a tool to be arranged movably in its longitudinal direction. Pressure liquid is fed to the percussion device and returned to a...
7874241 Electronically controllable and testable turbine trip system  
A tripping control system for use with, for example, turbines, includes a block circuit having two or more redundant blocking valves disposed or connected in series within a pressure supply line to...
7874152 Hydraulic system with compensation for kinematic position changes of machine members  
A machine, such as a backhoe, has a series of components connected in series and moved by separate hydraulic actuators. A position estimator determines the present position of each component from...
7874155 Systems and methods for energy storage and recovery using rapid isothermal gas expansion and compression  
The invention relates to systems and methods for rapidly and isothermally expanding and compressing gas in energy storage and recovery systems that use open-air hydraulic-pneumatic cylinder...
7870817 Actuator using fluid cylinder and method of controlling the same  
An actuator using a fluid cylinder in which rigidity may be attained with a simple configuration, includes a fluid cylinder, a first choke valve device, and a second choke valve device. The first...
7870729 Hydraulic control device  
The invention relates to a hydraulic control device for a priority, first hydraulic consumer and a subordinate, second hydraulic consumer, pressure medium being deliverable to the first or the...
7866151 Anti-saturation valve assembly for load sensing hydraulic system  
An anti-saturation valve assembly (51) for use in a hydraulic system having priority (17) and auxiliary (25) load circuits, the priority circuit providing a priority load signal (19). The...
7866252 Gasket, cover with gasket, and pneumatic cylinder with cover and gasket  
A gasket includes a damping buffer (1) for a piston (2) that can be charged with a pressure medium and that can be moved back and forth axially in a cylinder pipe (3) and includes at least one...
7866251 Power plant  
A power plant produces power by using high pressure gas to push a piston. The power plant uses a supply device to provide the high pressure gas to a cylinder and controls an admission valve and an...
7863767 Turbine driven electric power production system and a method for control thereof  
A turbine (2) driven electric power production system (1),—said turbine (2) arranged for being driven by a fluid (3) having a fluid speed (v) varying in time,—said turbine (2) connected to a hyd...
7862308 Rotary reciprocating pump  
A rotary reciprocating pump comprises: i) a pump housing having intake and discharge ports; a shaft driven rotary piston carder, rotatably carrying pistons circularly arranged therearound; ii) a...
7861641 Impulse generator and method for impulse generation  
The invention relates to an impulse generator for a rock breaking tool, the impulse generator (2) comprising a main chamber (4) for receiving a first pressurizeable fluid volume (6), an in the main...
7861642 Valve block, tool attachment, a working machine and the use of a valve block  
A valve block disposed adjacent a tool attachment of a working machine, where the tool attachment is adapted for connection to different types of hydraulically maneuvered tools or implements with...
7856918 Pneumatic brake booster comprising a force sensor  
A pneumatic brake booster 1 comprising: a sealed structure 3 comprising a rigid casing 11 forming a funnel 19 furnished with an opening and a movable wall 13 dividing the sealed structure 3 into a...
7854115 Post-pressure compensated hydraulic control valve with load sense pressure limiting  
An array of valve sections in a hydraulic system are connected to a supply line, a tank return line, and a load sense line. One valve sections includes a control valve with a metering orifice...
7849686 Valve assembly and a hydraulic actuator comprising the valve assembly  
A valve assembly (2) forming a bridge circuit and a hydraulic actuator comprising at least one valve assembly (2) are disclosed. The valve assembly (2) is fluidly connectable between a fluid source...
7849687 Electrohydraulic solar panel carrier adjusting device  
A solar panel carrier T is provided at a sub-structure U such that it can be rotated and tilted by means of hydrostatic rotation and tilt motors M, M′. In an electrohydraulic adjusting device for t...
7845169 Drift compensation control method for a machine  
A method of controlling a machine having a hydraulically actuated linkage includes lowering a load suspended by the leakage at least in part by leaking hydraulic fluid from a portion of a hydraulic...
7845268 Asymmetric volume booster arrangement for valve actuators  
An asymmetric volume booster assembly includes an actuator movable in a first direction and a second direction, a first booster in fluid communication with the actuator, and a second booster in...
7836690 Positioning control mechanism for double-acting air cylinder  
Between an air source and a first pressure chamber of a double-acting main cylinder having a length measurement sensor for measuring an acting position of a piston, a supply solenoid valve is...
7832427 Control valve arrangements  
A valve arrangement includes a valve member, which rotates continuously in one sense. The generally cylindrical head of the valve member, within the housing, is formed to co-operate with various...
7827903 Fluid operated device with improved seal valve  
A seal valve arrangement is provided for a hydraulic device (10). The hydraulic device has an inner bore (14). The seal valve arrangement includes an element (45) disposed in the bore. The element...
7827901 Free swinging piston heat machine  
The invention relates to positive-displacement free-piston heat machines with variable working chambers, which could be applied as an internal or external combustion engine, compressor, pump. The...
7827785 Hydraulic system with warm up circuit  
A hydraulic control system in which a pump for pressurized hydraulic fluid connects with a valve assembly having a valve element displaceable in a chamber to selectively direct fluid to a load...
7828245 Dual motor dual concentric valve  
An actuator control system has a dual concentric servo valve having a spool and at least one motor adapted to selectively displace the spool.