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7455494 |
Control circuit for an attachment mounting device
A control circuit for an attachment mounting device that has a closed position for securing an implement and an opened position for releasing an implement. The control circuit includes at least one...
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7454909 |
Impedance shaping element for a control system
An impedance shaping element (or more simply, an impedance shaper) physically alters or shapes the mechanical impedance of a drive system as it appears from an interface and facilitates use of...
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7456385 |
System and method for detecting an end of and/or a beginning of a stroke
A system and a method detect that a movable element within an interior of a compartment is at an end of a stroke and/or a beginning of the stroke within the interior of the compartment. A switch...
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7451790 |
Device for controlling hydraulic power units
An arrangement for controlling two drive units which interact with one another, one of which includes a hydraulically driven motor (2). The motor drives a varying load, and one or more valves (6,...
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7451685 |
Hydraulic control system with cross function regeneration
A system operates a hydraulic actuator, such as a cylinder, in one of several modes that include powered extension and retraction, self-powering regeneration modes in which fluid exhausting from...
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7451684 |
Actuator device with a microwave position detecting device
An actuator or servo device comprises an actuator member adapted to move linearly in the motion space of an actuator housing, a microwave position detecting device for detecting the position of the...
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7451686 |
Fluid system with signal-mimicking device and associated method
A fluid system comprises a static LS valve, a dynamic LS valve, a priority valve biased to preferentially supply pressurized fluid to both the static LS valve and the dynamic LS valve, and a...
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7448308 |
Vacuum type booster device
A valve piston 8 of a vacuum type booster device is provided with a bypass passage 51 which is defined between a sound-absorbing member 27 and an input rod 23 to communicate directly with the...
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7444920 |
Valve arrangement for the activation of a structural element
The valve arrangement for the activation of a structural element has three inlet switching valves through which a pressure-loaded medium can be conducted. These inlet switching valves are connected...
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7444813 |
Volume-conversion techniques for active-materials-based morphing structures
Described is a volume-conversion structure for causing a volume transfer. The volume-conversion structure includes a first reservoir and a second reservoir. The first reservoir includes a first...
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7444922 |
Fastening assembly, fastener, and fluid pressure cylinder unit
Each of two members to be fastened has a connecting surface, a communication groove opening on the connecting surface, and an engagement groove communicating with the communication groove and...
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7441407 |
Hydraulic drive control device
A hydraulic drive control device which is capable of translating the effect of oil pressure loss reduction into the effect of fuel consumption reduction that is very real to the user. The hydraulic...
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7441406 |
Fluid circuit and industrial truck having a fluid circuit
The invention relates to a fluid circuit for load displacement, having a fluid supply line for conveying fluid from a fluid tank by means of a fluid pump to at least one fluid store of a consumer,...
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7438029 |
Piston waveform shaping
An assembly includes at least one piston, a rotating member, a transition arm, and a mechanism. The transition arm is configured to translate between rotational movement of the rotating member and...
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7438086 |
Dynamic fluid power monitoring system for separate actuators
A control valve apparatus couples pressurized fluid to first and second actuators using first and second double valves. The first double valve includes first and second crossover passages and first...
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7437872 |
Object separating apparatus using gas
An object separating apparatus uses gas and has a hollow housing with a closed end connected to a first object, and an opened end. An axially movable cylinder is installed at an inner space of the...
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7434503 |
Pressure regulating device for a percussive hydraulic apparatus
A percussive apparatus comprises a body inside of which a striking piston is mounted in a cylinder bore. Two axially offset pieces are mounted inside the cylinder bore of the body while being...
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7434394 |
Hydraulic drive device
To permit using hold-side pressure oil in a first hydraulic cylinder for the acceleration of a second hydraulic cylinder upon performing a combined operation of the first and second hydraulic...
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7434392 |
Configurable hydraulic system for agricultural tractor and implement combination
When different implements are attached to an agricultural tractor, various hydraulic actuators on the implement are operated by connection to the hydraulic system on the tractor. A single hydraulic...
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7434393 |
Control system and method for supplying pressure means to at least two hydraulic consumers
Disclosed are a control arrangement and a method for the pressure medium supply of at least two hydraulic consumers that are supplied with pressure medium through the intermediary of a variable...
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7430954 |
Work machine
A work machine includes an attachment movable by an actuator, an operational member for operating the attachment through the actuator; and a controller operable to output an operation signal for...
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7430953 |
Loading implement and process for loading implement
A loading implement and method of operating a loading implement for the adjustment of a floating condition of a boom of the loading implement. The loading implement includes a hydraulic arrangement...
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7428861 |
Valve for hydraulic props of shield-type support frames, and shield-type support frame
The invention relates to a valve 120, especially a check valve, for hydraulic plungers (3) of shield-type support frames in underground mining with a valve housing 121 and a switchable valve insert...
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7426884 |
Circuit arrangement
A circuit arrangement includes a load sensing system (LS) with individual loads (10,14) arranged in series forming a series section, and in parallel forming a parallel section. A hydraulic supply...
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7424846 |
Pneumatically static balancer for machine tool
A pneumatically static balancer for a machine tool counterbalances or lightens a gravitational load generated by an own weight of a vertically moving driven member. The pneumatically static...
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7421986 |
Rotary radial internal combustion piston engine
The engine comprises a housing, a rotor, which is mounted in the housing for rotation about its axis. The rotor has a pair radially opposite cylinders spaced radially and apart from its axis of...
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7421938 |
Positioner for a fluid actuator
A positioner for a fluid actuator comprising an electronics assembly designed for setpoint/actual value comparison and for outputting a feedback control signal includes a current/pressure...
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7419134 |
Valve actuation assembly
A valve actuation assembly includes a housing and a vane connected to a shaft. The vane is at least partially disposed within the housing. The valve actuation assembly further includes a valve...
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7415919 |
Series hydraulic circuit for controlling operation of multiple cutting decks of a tractor
A series hydraulic circuit for permitting motorized operation and independent control of a plurality of cutting decks of a mower. The circuit allows separate operation of one of the decks while...
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7415989 |
Spool activated lock-out valve for a hydraulic actuator load check valve
A check valve system controls the flow of fluid between a spool valve and a hydraulic actuator and includes a pilot operated check valve that is controlled by a lock-out valve. The check valve has...
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7412919 |
Hydraulic force control system for clamping assembly
A hydraulic force control system is disclosed for controlling the clamping force applied to a load by the clamp arms of a clamping attachment of a load-lifting vehicle to prevent the arms from...
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7415376 |
Valve tester control enhancements
A valve tester system is disclosed that comprises a valve tester assembly for rotating a valve stem of a valve. The valve tester assembly may include a support, a rotation element mounted on the...
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7409932 |
Sliding joint for variable compression ratio device
A barrel-type internal combustion engine includes a power output shaft assembly with a sliding joint. A power output shaft has a pair of spaced apart bearing surfaces and a plurality of radial...
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7410010 |
Hydraulic impact mechanism
A hydraulic impact mechanism includes a housing with a cylinder bore, a forward working chamber and a rear working chamber, a hydraulic fluid supply passage connected to the forward working chamber...
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7409828 |
Control device
Control device 1 having a changeover valve 5, a pump 4 delivering operating medium, in particular a motor-operated pump or a hand pump, connection devices for connecting the control device 1 to at...
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7411320 |
Radially-activated engine
A motor includes a plurality of linearly activated pistons, positioned radially around an axis, which are selectively and sequentially biased against on offset element to produce rotation of a...
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7409830 |
Fuel-cell actuated mechanical device
A method generates mechanical energy by storing water in a fuel-cell and a pressure equalization device. The water stored in the fuel-cell is electrolyzed into hydrogen gas and oxygen gas, which...
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7409825 |
Hydraulic system with a cylinder isolation valve
A hydraulic system provides failure protection by incorporating an isolator adjacent a hydraulic actuator. The isolator has a first port connected to the hydraulic actuator and a second port with...
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7406911 |
Expander
An expander (M) employing steam as a working medium is formed from a first radially inner group of axial piston cylinders (49) arranged annularly on a rotor (27) so as to surround the axis (L) of...
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7406910 |
Device and method for controlling the position of a pneumatic actuator
The invention pertains to a device for the controlling the position of a pneumatic actuator comprising: a pneumatically adjustable actuating element (5);a pneumatic actuating drive (6) for...
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7406982 |
Hydraulic system control method using a differential pressure compensated flow coefficient
A hydraulic system has an electrohydraulic valve that controls flow of fluid to operate a hydraulic actuator, such as a cylinder or motor. A set of characterization data is provided which describes...
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7401541 |
Servo-pneumatic actuator
A positioning system includes an actuator, valve (preferably pneumatic), position sensor and an electronic valve controller, integrated in a single unit. Continuously variable setpoints are...
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7402027 |
Rotating group of a hydraulic machine
A hydraulic machine-has a rotating group located within a housing and a port plate to control flow from the barrel of the rotating group to inlet and outlet ports. The port plate is sealed against...
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7401542 |
Adjustable hydraulic metering system
A vehicle is disclosed having a hydraulic control system with a user input to select a range of metering rates.
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7401466 |
Hydraulic drive, in particular for two-cylinder thick matter pumps
The invention relates to a hydraulic drive, especially for two-cylinder thick matter pumps. Said hydraulic drive comprises at least one main pump (10) embodied as a hydraulic variable displacement...
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7398646 |
Hydraulic stabilising device for vehicles
A hydraulic stabilizing device for vehicles having an actuator which can be acted on in opposite directions comprises a switching device, which is formed by a directional control valve, and, in...
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7395662 |
Hydraulic control arrangement
A hydraulic control arrangement is disclosed for the control of a consumer, comprising at least one mechanically operated continuously adjustable distribution valve with a subsequent LUDV pressure...
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7395749 |
Pneumatic cylinder
A pneumatic cylinder having a cushioning valve assembly. A tubular body is capped by a pair of cylinder heads. A hollow cylinder rod having a piston assembly and cushioning valve assembly is seated...
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7392734 |
Actuator using fluid cylinder, method of controlling the actuator, and choke valve devices
The present invention provides an actuator using a fluid cylinder capable of imparting stiffness to a fluid cylinder such as an air cylinder with a simple constitution, a control method thereof and...
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7390178 |
Compressor
A compressor comprises a plurality of pairs of a cylinder bore and a piston moving reciprocally in the cylinder bore, a valve plate provided with a plurality of outlet holes for leading pressurized...
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