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JPH0620882Y2 |
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JPH0641761B2 |
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JPH0620881Y2 |
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JPH0618092Y2 |
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JPH06129403A |
PURPOSE: To make the provision of a pressure detecting device unnecessary in a valve positioner for an adjusting valve or the like by providing a solenoid valve to open/close an air feed route to an operation portion, conducting the clos...
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JPH0629601B2 |
1. Hydraulic directional valve for an aircraft servocontrol, for example the flaps (1) of air brakes of aircraft wings, comprising a plug (12) rotatably mounted in a fixed liner (13) housed in a body (15) and connected at one end (17) to...
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JPH0623561B2 |
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JPH0619671B2 |
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JPH06501560A |
An apparatus is adapted to detect the linear extensions of a plurality of hydraulic cylinders. Each hydraulic cylinder defines a variable length coaxial resonant cavity. Under the control of a controller, a transmitting section, a receiv...
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JPH0642504A |
PURPOSE: To control positioning with high speed and accuracy in a fluid pressure actuator for a machine tool by holding a fluid directional changeover valve inside a casing, and sliding a rod of the fluid directional changeover valve thr...
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JPH0610481B2 |
A control system for controlling a double-acting cylinder includes four pilot-operated, proportional-type poppet valves for controlling fluid flow between the cylinder, a pump and a reservoir. Four solenoid-controlled pilot valves operat...
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JPH0633902A |
PURPOSE: To secure a stable control/driving for the change of the load to be controlled with a sufficient driving force while realizing the downsized and lightweight construction at low cost in a step motor actuator to stroke the equipme...
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JPH066961B2 |
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JPH0610901A |
PURPOSE: To use one feedback lever unit for various types of valves by grooving a bracket, attaching the bracket to an elongated hole of the feedback lever in such a way as to be sandwiched between the hole, forming parts inserting a fee...
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JPH0610904A |
PURPOSE: To provide a hydraulic slide control device that can drive a piston of a hydraulic working cylinder at a variable speed with a simple structure by giving some features to a hydraulic passage without relying upon a hydraulic pres...
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JPH0610375A |
PURPOSE: To enhance operability by controlling a hydraulic actuator which drives a construction machine in order to match with a predetermined target speed in conformity with a detected actual position and halting the operation of the ac...
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JPH063201B2 |
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JPH063202B2 |
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JPH05341804A |
PURPOSE:To suppress the current difference caused between the channels of a servo system of a multiple electrohydraulic valve without adding any unstable element due to a time lag. CONSTITUTION:A signal A excluding the final output curre...
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JPH0584330B2 |
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JPH0544565Y2 |
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JPH05296201A |
PURPOSE: To lesson limitation of power consumption by supplying a power source part with power generated by use of exhaust air pressure in a positioner wherein a signal provided by a current signal is converted into an appropriate air pr...
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JPH0578684B2 |
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JPH0578685B2 |
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JPH0577256B2 |
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JPH0542242Y2 |
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JPH05507252A |
PCT No. PCT/EP92/00279 Sec. 371 Date Nov. 6, 1992 Sec. 102(e) Date Nov. 6, 1992 PCT Filed Feb. 10, 1992 PCT Pub. No. WO92/16397 PCT Pub. Date Oct. 1, 1992.The invention is related to a hydraulic unit for hydraulic control and regulation ...
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JPH05507138A |
(57) [Summary] Since this publication is application data before electronic filing, summary data is not recorded.
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JPH0570721B2 |
A system (10) of parallel hydraulic actuators (15) and (20) includes a pair of laterally spaced, longitudinally extending, discrete feedback levers (180) and (185) which independently provide feedback signals to a pair of actuator contro...
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JPH05240202A |
PURPOSE: To simplify the structure of a servo positioner by eliminating the operating position detection means and a feedback control circuit of a positioner cylinder. CONSTITUTION: The respective pressure chambers 1f, 1g of a positioner...
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JPH0564241B2 |
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JPH0567801U |
[Purpose] Even when used in a high temperature environment, the switch operation of the pressure switch is reliable and reliability is improved. [Constitution] Communication passages 52a and 52b that communicate the inside and outside ar...
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JPH05231402A |
PURPOSE: To compensate for a dead band pertaining to a hydraulic servo valve, and improve the responsiveness and control accuracy thereof in a hydraulic drive system having a hydraulic servo valve of large flowrate type. CONSTITUTION: Ch...
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JPH0566712U |
[Purpose] It ensures that the pressure switch operates even when used in a high temperature environment, improving reliability. [Constitution] A communication passage 52a for communicating inside and outside is formed in the wall of the ...
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JPH05223102A |
PURPOSE: To enhance stability and response property by inserting a secondary delay circuit in a feedback circuit in a servo system that controls a body to be controlled based on a reference input signal corresponding to a target value an...
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JPH05223101A |
PURPOSE: To enlarge a variable range of operating speed of an actuator by providing such a positioner that controls displacement amount of the actuator so that it becomes fixed functional relation with respect to an optional input signal...
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JPH0558950B2 |
The return spring (33) of the actuating rod bears upon a collar (30) which is mounted so as to slide on the rod (21) and which incorporates, on the opposite side from the return spring (33), first (34) and second (35) bearing surfaces in...
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JPH0553442B2 |
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JPH05202901A |
PURPOSE: To perform optimal control by making a control signal through calculation of deviation between an input signal and a feedback signal, by controlling a valve opening through conversion of the control signal to a pneumatic pressur...
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JPH05202902A |
PURPOSE: To reduce the energy consumption by compensating lack of driving force of an electric driving means for driving a loading equipment, recovering the inertial energy of the load during decelerating period and discharging it during...
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JPH05196008A |
PURPOSE: To provide a pneumatic action device and its controller which can actuate a device such as an air cylinder and stop it at a certain position, actuate it reversely and control its action speed freely. CONSTITUTION: In the control...
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JPH05196002A |
PURPOSE: To decrease the maximum flow rate to be supplied to an actuator, by providing a plurality of actuator having comparatively small capacity as actuators to drive a control rudder and by operating selectively the actuators to corre...
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JPH05187405A |
PURPOSE: To reduce the cost of a valve positioner by providing a time difference detecting means receiving a valve opening degree detection signal and a diagnosis initiating signal so that occurrence of abnormality is determined when a d...
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JPH0528347Y2 |
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JPH0547721B2 |
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JPH0547722B2 |
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JPH05172102A |
PURPOSE: To reversibly change over a small type flow adjusting valve and a large type flow adjusting valve to adjust flow of fluid without generating hunting and the like at the time of changing over flow control. CONSTITUTION: Valve ope...
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JPH05172105A |
PURPOSE: To obtain a control device with improved responsiveness at the time of start of a proportional electromagnetic valve. CONSTITUTION: This control device of a proportional electromagnetic valve is provided with; a proportional ele...
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JPH05172104A |
PURPOSE: To offer a control device for improving responsiveness while keeping overlap at the time of a neutral state and preventing leak thereof, and to prevent generation of vibration in a circuit system. CONSTITUTION: This is a control...
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JPH0543881B2 |
PCT No. PCT/DE87/00403 Sec. 371 Date May 4, 1988 Sec. 102(e) Date May 4, 1988 PCT Filed Sep. 4, 1987 PCT Pub. No. WO88/01697 PCT Pub. Date Mar. 10, 1988.A hydraulic idling-regulating valve comprising at least two mechanically operated th...
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