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9032861 Arrangement for providing a variable throttle cross-section for a fluid flow  
An arrangement for providing a throttle cross-section for a fluid flow. The throttle cross-section can be varied depending on a pressure difference present across the throttle cross-section. The...
8899143 Hydraulic control system having variable pressure relief  
A hydraulic control system is disclosed. The hydraulic control system may have a pump configured to pressurize a fluid, an actuator, a position sensor associated with the actuator and configured...
8631651 Hydraulic system thermal contraction compensation apparatus and method  
An apparatus for compensating for fluid contraction in a hydraulic powered telescoping boom may include a monitor determining the elevation angle of the telescoping boom, a supply of hydraulic...
8365762 Hydraulic control system  
A control system for transferring fluid between a fluid supply and a process. The control system includes a transfer controller, which outputs a transfer signal that corresponds to a time varying...
8127659 Compressible fluid pressure actuator driving mechanism and control apparatus thereof  
Fluid pressures of a plurality of compressible fluid pressure actuators that drive a joint through antagonistic driving are controlled by a main-fluid pressure control device, and at the time of...
7587897 Magnetically sequenced pneumatic motor  
A pneumatic motor having a piston and a magnetically actuated valve. The magnetically actuated valve may be adjacent the piston and, in some embodiments, include a spool valve.
7343845 Fluid operated position regulator  
A fluid operated position regulator comprises a servo means, arranged in a regulator housing and by which a supply connection, a venting connection and a power connection can be placed in circuit...
7207177 Position control device for an electrical-fluid power drive and a method of positioning  
A method and a position control device for an electrical-fluid power drive comprising a fluid power and an electrical actuator for driving a force output point. The invention contemplates the...
7143682 Large manipulator having a vibration damping capacity  
A large-size manipulator comprises a boom made up of several segments and arranged on a vehicle frame. The boom is foldable and has a slewing track ring rotated about a vertical axis of rotation....
6443046 Method of controlling a long-stroke, hydraulic operating cylinder  
There is described a method of controlling a long-stroke, hydraulic operating cylinder (1), in particular a screw-down cylinder for an edging stand, where the piston (4), to which a load can be...
5542337 Electro-pneumatic valve positioning device  
A device capable of comparing the travel position of an output shaft of a diaphragm actuator or cylinder with the current level of an electronic input signal and further being capable of...
5452745 Magnetorheological valve and devices incorporating magnetorheological elements  
A valve used to control the flow of a magnetorheological fluid, in which the mechanical properties of the magnetorheological fluid are varied by applying a magnetic field, is described. The valve...
5329969 Fluid controller with joystick capability and actuator therefor  
A controller (11) and a system for controlling the flow of fluid to a fluid pressure operated device (C) are disclosed. The controller is of the type including a rotatable spool valve (35) and a...
5271313 Position-controlled actuator  
A position-controlled actuator including a double acting pneumatic actuator, a selector valve which causes function of the actuator, a comparator which controls the action of the selector valve in...
4987822 Linear actuator  
A linear actuator comprising a linear motor, more especially in the form of a pneumatic motor, which has a housing containing an axially moving piston which is connected with an actuating rod...
4972915 Hydraulic steering apparatus  
A hydraulic steering apparatus for a construction vehicle, which has been developed for the purpose of improving the steering control performance of an apparatus of this kind by preventing the...
4953445 Control device with failure detection centering for a double-acting hydraulic jack  
The invention relates to the control of a hydraulic jack which can be used, for example, for controlling the orientation of the rear wheels of a vehicle with front guiding wheels. In the event of...
4915281 Arrangement for a method of converting a stepwise translation movement into a continuous translation movement  
For converting a stepwise translation movement into a continuous translation movement and arrangement and a method is provided which have at least two fluid-operated cylinder-piston units with...
4854219 Optical control system  
An optical actuator position demand signal through optic fiber 14 is focused on one side 32 of optical fluidic interface 16. A second optical signal through optic fiber 56 is attentuated 50 in...
4733599 Apparatus for controlling the flow of a pressure fluid in a motor  
An apparatus for controlling the flow of a pressure fluid in a motor includes an arm which cooperates with a locking device to regulate the flow of the pressure fluid through a shut-off member or...
4718869 Marine engine throttle/transmission hydraulic actuator  
A single-lever hydraulic control system for marine applications which controls both engine throttle and the transmission engaged therewith, and which allows for multiple control stations.
4644648 Portable hydraulic tools  
A portable hydraulic tool, such as a hydraulic secateurs, is of the kind having a single acting ram including a driving piston with its piston rod connected to at least one movable operating...
4510846 Pneumatic actuator device  
A closed center four-way poppet actuator control device is incorporated into a pneumatic actuation system for controlling the movement of flight surfaces. The closed center four-way poppet...
4433613 Power steering system for motor vehicles  
A power steering system for motor vehicles, wherein a steering nut, connected to a steering worm in such a manner that the steering worm is driven thereby, is rotatably and axially non-displacably...
4427026 Limit control for an operating member  
An adjusting mechanism (92) is provided between a valve spool (62) and a valve actuating lever (26) whereby with the lever (26) locked in a selected position, the mechanism (92) is manipulated to...
4354422 Load relief device for power steering system  
A load relief device for a power steering system of a vehicle. The load relief device provides release of loads from a hydraulic pressure supply pump of the power steering system when the output...
4318334 Torque control for a fluid operated motor  
A torque control for a fluid operated motor includes a first gear to be driven through operation of the motor and a second gear in driving engagement with said motor and maintained in a generally...
4282798 Control valve unit for hydraulic linear actuator  
A control valve unit (10) disclosed includes a slide mechanism (14) mounted on a base (40) of the unit, a control member (18) driven by a hydraulic linear actuator (12) controlled by the unit, and...
4271749 Reduced back pressure, anti-cavitation valve system  
A valving system for regulating the pressure of the fluid within a hydraulic actuator of the type having a hydraulic cylinder and movable piston therein that separates the cylinder into a first...
4252050 Control valve unit for hydraulic actuator  
A control valve unit (10) disclosed supplies hydraulic fluid to an actuator (12) in a manner that controls both acceleration and deceleration of the actuator movement. A supply valve (14, 22) of...
4242942 Hydraulic positioner with feedback device  
A hydraulic control arrangement with a feedback device for positioning an implement comprises a positioner including a fluid operated cylinder and piston unit, the piston of which is connected by...
4207803 Stopping device for double-acting, pneumatic operating cylinders  
The invention relates to a positioner device for positioning the piston and piston rod of a double-acting, pneumatic operating cylinder at a preselected position for setting the position of a...
4161865 Steering control with hydraulic follow-up  
A steering control with a hydraulic follow-up wherein a movable valve member of a control valve is automatically brought back to a nonsteering disposition as a result of the movement of the device...
4121618 Hydraulic ramping circuit for control valve  
A hydraulically actuated control valve normally includes a hydraulic cylinder which has an internal piston connected through a shaft to the actuating mechanism in the control valve. Ports are...
4119013 Hydraulic chucking device in a hobbing machine  
A hydraulic drive mechanism for a chucking device on a workpiece spindle on a gear hobbing machine. A chucking piston is movable back-and-forth in the chucking cylinder and rotates with the...
4029359 Safety apparatus for hydraulic valves in dump body mechanisms  
A cable is connected between the dump body of a dump truck and the movable control member of an hydraulic valve to automatically shift the valve from its "raise" position to its "neutral" position...
4003202 Variable feedback steering system  
A hydraulic control circuit for the steering system of an articulated vehicle is provided having a first pump means for delivering fluid under pressure and directional control valve means in fluid...
3961560 Control means for jet aircraft thrust reversing means  
Control arrangement including an actuator, such as an air motor, for operating the jet deflector flaps of a thrust reverser, and a pilot valve and a control valve for operating the actuator. The...
3896914 Vehicle drive with clutch engagement control  
A vehicle drive having in a preferred embodiment an electric traction motor powering a drive axle through a toothed clutch coupling shiftable between forward and reverse positions through a...
3893373 Programming system for machine tools or the like  
A programming system for use in machine tools wherein a slide is reciprocable by a hydraulic motor which receives and discharges hydraulic fluid by way of a regulating valve on the slide. The...
3865218 Differential flow pressure switch for dual valve circuits  
It is known to use parallel dual valves for controlling operation of cyclic machines such as power presses and press brakes. Dual solenoid valves are used so that the machine will continue to...
3826090 VARIABLE PRESSURE HYDRAULIC SYSTEM  
A variable pressure hydraulic system in which a motor is operated by a variable displacement pump whose displacement is regulated by a control valve which is sensitive to the pressure at the...
3700080 TRANSMISSION WITH FLUID PRESSURE RELEASED BRAKE  
The parking brake mechanism illustrated includes a cable-actuating arrangement wherein the removal of the Park pawl from the teeth of a transmission output shaft, under load conditions, is...
3631677 COMPRESSOR DISCHARGE PRESSURE COMPUTER  
A servomechanism or pressure computer is shown which utilizes the jet nozzle servo principle. An input shaft is positioned for slight rotational movement within a sealed housing with the...
3628421 BILATERAL HYDROMECHANICAL SERVOSYSTEM  
A single control valve is utilized in the slave loop and master force feedback loop. Instabilities in the master loop due to the high gain required in the slave loop are eliminated by utilization...
3534679 CONTROL MEANS FOR PRESSURE RELIEF IN HYDRAULIC MACHINES  
3557451 INDEX NOTCH CUTTING DEVICE  
3479924 PISTON TYPE OPERATOR WITH POWER CHECKING  
3394545 Hydraulic steering system  
3384019 Torque control means for variable displacement hydraulic pumps  

Matches 1 - 50 out of 75 1 2 >