| Patent Number |
Title Of Patent |
Date Issued |
| 5074194 |
Hydraulic driving method of and hydraulic driving apparatus for hydraulic machine |
December 24, 1991 |
| In a hydraulic machine such as, for example, a hydraulic excavator equipped with hydraulic actuators, a hydraulic driving method and a hydraulic driving apparatus enable all the hydraulic actuators to be operated according to normal operational-speed characteristics (first mode). The |
| 5062350 |
Hydraulic drive system for civil engineering and construction machine |
November 5, 1991 |
| A hydraulic drive system for a civil engineering and construction machine of the present invention comprises a hydraulic pump (11, 11A), a plurality of actuators (4-6) driven by a hydraulic fluid supplied from the hydraulic pump and including an arm cylinder (5) and a boom cylinder (4), |
| 5060201 |
Probe for ultrasonic microscope |
October 22, 1991 |
| A probe for an ultrasonic microscope is disclosed. The probe has an element for radiating and receiving an ultrasonic wave and an acoustic lens for causing an ultrasonic wave, which has been generated by the element, to converge at a point into an ultrasonic beam, whereby the ultrasonic |
| 5056312 |
Hydraulic drive system for construction machines |
October 15, 1991 |
| A hydraulic system for a construction machine comprising plural hydraulic actuators (23-28) driven by fluid supplied from a pump (22), first and second flow control valves (29-34) for controlling flows of fluid supplied to the first and second actuators, and first and second distribution |
| 5052117 |
Apparatus for measuring gear |
October 1, 1991 |
| A gear measuring apparatus comprises detecting device for outputting detection signals, an X-direction linear travel system for making the detecting device travel linearly in an X direction perpendicular to a radial line and rotation device for rotating the detecting device by causin |
| 5050137 |
Ultrasonic probe |
September 17, 1991 |
| An ultrasonic probe comprising an acoustic lens (20) having a concave lens surface (21) formed on one side of a lens body, and a piezoelectric transducer (23) disposed on the other side of the acoustic lens, ultrasonic waves generated by applying voltage to the piezoelectric transduc |
| 5048294 |
Safety device for hydraulic closed circuit |
September 17, 1991 |
| A variable displacement hydraulic pump and a hydraulic motor are connected in a closed circuit. A pressure oil supply means includes the variable displacement hydraulic pump and a tilting controlling means for controlling a tilt angle of the hydraulic pump and supplies an amount of p |
| 5048293 |
Pump controlling apparatus for construction machine |
September 17, 1991 |
| A hydraulic drive controlling apparatus for a construction machine has at least one variable displacement type hydraulic pump, a plurality of actuators driven with a hydraulic fluid from the hydraulic pump, directional control valves driven in accordance with amounts of manipulation |
| 5042305 |
Ultrasonic flaw detecting system |
August 27, 1991 |
| According to the present invention, a cursor is displayed on a screen of display of an ultrasonic image obtained by scanning the surface of an inspection object by use of a probe formed by arrangement of array elements and, further, the cursor is moved to a desired position of the ul |
| 5038068 |
Thin film pattern and method of forming the same |
August 6, 1991 |
| A thin film pattern and a method of fabricating the thin film pattern available for an ultrasonic transducer are disclosed. That is, an oriented thin film made of a material different from the material of a substrate is formed on the substrate, a mask having a predetermined pattern is fo |
| 5036817 |
Engine remote control system |
August 6, 1991 |
| Disclosed is a remote control system which produces electric signals to be sent to a governor driving device from an operator's cabin for remote control of the governor mechanism. This remote control system essentially includes a detector for detecting the amount of control effected to t |
| 5025625 |
Commonly housed directional and pressure compensation valves for load sensing control system |
June 25, 1991 |
| A hydraulic control system for driving a plurality of actuators basically includes directional control valves, and pressure compensation valves, and at least one detection valve, the directional valves and the pressure compensation valves both corresponding in number to the actuators. Th |
| 5016721 |
Full-turn type working machine |
May 21, 1991 |
| Described is a full-turn type working machine which generally consists of a lower travelling body and an upper rotary body. The upper rotary body includes a machine room, an operator's cabin, a fuel tank and a counterweight which are laid out within a circle of a predetermined rotati |
| 5005420 |
Ultrasonic method for measurement of depth of surface opening flaw in solid mass |
April 9, 1991 |
| The present invention provides a method for ultrasonic measurement of mainly the depth of a flaw possibly existent in a solid mass and opening to the surface of the solid mass. An ultrasonic wave is transmitted into the solid mass by scanning an ultrasonic probe back and forth on the |
| 5005358 |
Hydraulic drive system for crawler-mounted construction vehicle |
April 9, 1991 |
| A hydraulic drive system for a crawler-mounted construction vehicle includes: a hydraulic pump (1); a plurality of hydraulic actuators including traveling hydraulic motors (2, 3) driven by the hydraulic pump; a plurality of flow control valve means including first and second flow con |
| 5005298 |
Displacement controller for fine positioning device |
April 9, 1991 |
| A controller for a fine positioning device constructed of planar structural units connected symmetrically and equipped individually with planar flexible beams arranged in an opposing relation between two rigid members and actuators for applying forces between the two rigid members includ |
| 5003776 |
Hydraulic drive system |
April 2, 1991 |
| A hydraulic drive system is equipped with an engine, a plurality of hydraulic pumps adapted to be driven by the engine and including a variable displacement hydraulic pump provided with a displacement varying mechanism, a hydraulic motor connected to the variable displacement pump, a |
| 5003516 |
Ultrasonic probe and manufacture method for same |
March 26, 1991 |
| An ultrasonic probe comprising an acoustic lens (20) having a concave lens surface (21) formed on one side of a lens body, and a piezoelectric transducer (23) disposed on the other side of the acoustic lens, ultrasonic waves generated by applying voltage to the piezoelectric transduc |
| 4995711 |
Slide table |
February 26, 1991 |
| A slide table includes an inner member, an outer member fitted at least partly over the inner member, air bearings provided between the inner and outer members, and a motor means having a coil connected to the outer member to drive the same. |
| 4991309 |
Fine positioning device and displacement controller therefor |
February 12, 1991 |
| A fine positioning device is formed of a rigid support member; a first set of radial flexible-beam displacement mechanisms provided symmetrically to each other on the support member to produce angular displacements about a first axis; a second set of radial flexible-beam displacement mec |
| 4987356 |
Profiling control system for given curved surface |
January 22, 1991 |
| A profiling control system for a multiple-degree-of-freedom working machine having at least two degrees of freedom has at least one force control loop. The control loop has a detector for detecting the force applied to a working tool from a work surface, an error detector for determining |
| 4984936 |
Stopper apparatus for rotary reaction force |
January 15, 1991 |
| A stopper apparatus for neutralizing rotary reaction force set up by the rotation of a casing in an all-casing driver, comprises a long transmission frame for transmitting the reaction force, including a base frame connected to a casing drive unit and a joint frame one end of which i |
| 4984567 |
Apparatus for measuring intracranial pressure |
January 15, 1991 |
| The present invention relates to an apparatus for measuring the intracranial pressure of a living body or patient utilizing ultrasonic waves. An ultrasonic pulse is transmitted as triggered by a trigger signal into the cranium from an ultrasonic probe placed outside the cranium of th |
| 4971061 |
Apparatus for recording intracranial pressure |
November 20, 1990 |
| An apparatus for recording the intracranial pressure of a living body or patient utilizing ultrasonic waves includes a probe which is connected to a pulser to receive intracranial echoes that are multi-reflected being interfered with each other, a receiver for amplifying the received ech |
| 4967557 |
Control system for load-sensing hydraulic drive circuit |
November 6, 1990 |
| Control system for a load-sensing hydraulic drive circuit comprising; at least one hydraulic pump; hydraulic actuators driven by the hydraulic pump; and a pressure compensated flow control valve between the pump and each of the actuators, for controlling a flow rate of fluid to each |
| 4966109 |
Hydraulic connecting rod |
October 30, 1990 |
| A connecting rod for an internal-combustion, steam or the like, engine, having hydraulic means for converting the reciprocating motion of engine piston to the rotating motion of crankshaft. While producing the same torque on crankshaft, the hydraulic connecting rod enables the crankshaft |
| 4955344 |
Apparatus for controlling rotational speed of prime mover of construction machine |
September 11, 1990 |
| A controller having an up/down switch for changing the rotational speed of a prime mover such as an engine, an actuator such as an electric motor for driving a governor on the basis of the operation of the up/down switch so as to control the rotational speed of the prime mover. A target |
| 4945723 |
Flow control valves for hydraulic motor system |
August 7, 1990 |
| A hydraulic drive system has first and second flow control valves. Each of the control valves has a main valve of the seat valve type with a valve body for controlling communication between an inlet port and an outlet port which are both connected to a main circuit. Each further have a |
| 4942900 |
Pressure control valve |
July 24, 1990 |
| A pressure control valve has a main valve element of seat type slidably accommodated in a valve case for controlling communication between inlet and outlet sections of the valve case by movement of the main valve element, a control chamber defined within the valve case and between the |
| 4942737 |
Drive control system for hydraulic construction machine |
July 24, 1990 |
| A drive control system for a hydraulic construction machine, comprises a prime mover driven by a hydraulic pump, at least one hydraulic actuator driven by hydraulic fluid discharge from the hydraulic pump, first rotational speed setting arrangement including a first operating arrange |
| 4939431 |
Control system for synchronous rotation of cutter heads, for use in shield machine |
July 3, 1990 |
| In a control system for synchronous rotation of the cutter heads in a multi-cutter shield machine, the rotation cutter heads are so disposed in generally the same plane such that the distance between the centers of the adjoining cutter heads is larger than the radius, and smaller than th |
| 4938022 |
Flow control system for hydraulic motors |
July 3, 1990 |
| In a hydraulic drive system, first and second flow control valves means comprise each: a main valve having a valve body for controlling communication between an inlet port and an outlet port both connected to a main circuit, a variable restrictor capable of changing an opening degree |
| 4920660 |
Fine positioning device and displacement controller therefor |
May 1, 1990 |
| A fine positioning device is formed of a central rigid portion, a first set of outwardly-extending portions extending symmetrically along a first axis from the central rigid portion, a second set of outwardly-extending portions extending symmetrically from the central rigid portion along |
| 4919390 |
Solenoid operated valve apparatus |
April 24, 1990 |
| A solenoid operated valve apparatus in which a solenoid device includes an inner yoke, a plunger guide disposed in the opposed relationship with the inner yoke, a plunger movably accommodated in s space formed between the inner yoke and the plunger guide, a bobbin frame disposed to surro |
| 4914952 |
Ultrasonic method for measurement of size of any flaw within solid mass |
April 10, 1990 |
| The present invention provides an ultrasonic method for measuring the size of a possible flaw in a solid mass, in which an ultrasound is transmitted perpendicularly to the searching surface of a solid mass being the object under measurement through a liquid, a ratio in sound pressure bet |
| 4910673 |
Apparatus for controlling arm movement of industrial vehicle |
March 20, 1990 |
| In an industrial vehicle having at least first and second arms rotatably coupled to each other, a locus depicted by a tip of the second arm during rotation of the first and second arms is controlled. An amount of positional deviation of the tip of the second arm in the direction (com |
| 4907667 |
Full-turn type working machine |
March 13, 1990 |
| Described is a full-turn working machine which generally consists of a lower travelling body and an upper rotary body. The upper rotary body includes a machine room, an operator's cabin, a fuel tank and a counterweight which are laid out within a circle of a predetermined rotational |
| 4904954 |
Ultrasonic signal amplifier circuit and system of gain control thereof |
February 27, 1990 |
| A gain of a variable gain amplifier circuit is controlled by applying a signal of a predetermined voltage level to the variable gain amplifier circuit during an idle period of an ultrasonic receiving signal, deriving an output from the variable gain amplifier circuit, comparing it with a |
| 4888878 |
Fine positioning device |
December 26, 1989 |
| A fine positioning device is formed of a central rigid portion, a first set of outwardly-extending portions extending symmetrically along a first axis from the central rigid portion, a second set of outwardly-extending portions extending symmetrically from the central rigid portion along |
| 4881450 |
Drive control system for hydraulic machine |
November 21, 1989 |
| A drive control system, which is suitable for use in a hydraulic machine, is equipped with an electric lever device having a manipulation lever and a potentiometer for generating an electrical manipulation signal corresponding to the degree of each manipulation of the lever, a control |
| 4875337 |
Construction machine dual-dump hydraulic circuit with piloted arm-boom cylinder supply priority |
October 24, 1989 |
| A hydraulic circuit for a construction machine which operates an actuator for working machine simultaneously with an actuator for working element without degrading the operation of the actuator for working machine. The hydraulic circuit comprises a first hydraulic pump, a first direction |
| 4870247 |
Method and apparatus for controlling a welding robot forming a nonuniform weld satisfying predet |
September 26, 1989 |
| A welding torch (4) of a welding robot (RO) is supported by arms (2, 3), to be movable under the control of a computer (7). First and second members (W1, W2) are welded by a mold woven while oscillating an welding torch (4) along a weld line (WL), with data on changes in an interspace be |
| 4862383 |
Ultrasonic inspection apparatus |
August 29, 1989 |
| In an ultrasonic inspection method and apparatus for inspecting the presence or absence of a defect in an object to be inspected by receiving as an RF signal a reflection beam of an ultrasonic beam emitted from a probe to the object and displaying data of the RF signal on a display u |
| 4858649 |
Valve apparatus |
August 22, 1989 |
| A valve apparatus (1; 50; 60, 61; 90; 100) in which at least one flow control valve (21, 22; 63, 76; 101) is incorporated in a body block (20; 62, 82), and the flow control valve is connected in pilot lines (6-9) which connect a pilot valve (2) supplied with a pilot hydraulic fluid of a |
| 4846046 |
Hydraulic drive circuit system |
July 11, 1989 |
| A hydraulic drive circuit system is equipped with an accelerator pedal and an accelerator lever for respectively instructing target revolution numbers for an engine, a link plate for selecting greater one of the instruction values, and a linkage and a switch for controlling valves re |
| 4832082 |
Hydraulic pilot operated directional control valve |
May 23, 1989 |
| A hydraulic pilot operated directional control valve (30; 60; 70) in which at least one pilot hydraulic pressure chamber (40, 41; 76) is formed within a block (39; 64; 75) of a hydraulic pilot operating section (32, 33; 61; 72), and pilot hydraulic fluid is led into the pilot hydraulic |
| 4813447 |
Flow control valve apparatus |
March 21, 1989 |
| A flow control valve apparatus includes a housing including a main fluid passage having an inlet port and an outlet port; a main valve disposed between the inlet port and the outlet port for allowing or shutting off communication between the inlet port and the outlet port; a backpressure |
| 4809504 |
Control system for controlling input power to variable displacement hydraulic pumps of a hydraul |
March 7, 1989 |
| A control system for controlling input power to hydraulic pumps of a hydraulic system including a prime mover and a plurality of variable displacement hydraulic pumps driven by said prime mover. The control system comprises: a first computing unit for computing, for each of the hydra |
| 4785667 |
Method of measuring inclining angle of planar defect of solid material by ultrasonic wave |
November 22, 1988 |
| A method of measuring the inclining angle of a planar defect of a solid material with ultrasonic waves which includes the steps of irradiating ultrasonic waves incident to the planar defect of a solid material while longitudinally scanning a probe forwardly and backwardly. The inclining |
| 4772161 |
Profile working machine |
September 20, 1988 |
| A profile working machine includes a support portion, a working portion, and a drive and control system. The machine also includes displacement sensors for detecting the present relative displacements between the support portion and working portion, a load sensor for detecting each w |
