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Patent Searching and Data


Matches 651 - 700 out of 2,193

Document Document Title
JP2002327703A
To solve the problem that conventional hydraulic circuits can not satisfy customers needs to expand the setting range of a maximum torque.The hydraulic circuit is composed in that control valves 12, 13 which are connected individually wi...  
JP2002327588A
To provide an earth drill making it possible to easily select either earth drill work or hammer grab work, depending on whether the ground is weak or hard, for the discharge of sediment in a easing used in all-casing construction method....  
JP2002327587A
To enhance the operational efficiency of auxiliary hoisting work by preventing interference between a boom and a front frame and reduce costs by using a simple arrangement.This earth drill comprises a boom and a front frame adapted to op...  
JP3363426B2
To provide a chuck device capable of easily detaching a chuck even when it is hard to detach due to firm clamping of a shaft by the chuck. This chuck device is composed of a chuck holder 41 with an external thread 46 formed at the outer ...  
JP3364187B2
To use one type of an excavator driving device supporting and rotatively driving a kelly bar at a low cost in a ground excavator selectively using combinations of an excavation bucket or an excavation auger and soil kelly bars according ...  
JP2002309576A
To provide a drive for a rotary press-in pile capable of driving the pile at high torque and, if necessary, setting torque low.The rotary press-in pile is rotated and driven into the ground by a vertically movable pile drive having a hyd...  
JP2002303302A
To provide an unloading device of a hydraulic working machine of excellent operability and capable of performing complex operation.A lever type manual directional control valve 11 of a hydraulic pipe A, pilot type directional control val...  
JP2002303087A
To provide an auger device, which is mounted on a front of a base machine and which can form an uncurved pile hole with high vertical accuracy.A casing 24, which is externally inserted into the auger 11 driven for rotation by an auger dr...  
JP3332440B2  
JP2002285773A
To dispense with an expensive tool by minimizing influence for a worker in rock drilling and quickly completing working at very low noise.A rock drill 1 is composed of a support shaft 2 providing an anchor 4 fixed on an object to be dril...  
JP3330799B2  
JP3329255B2  
JP3348191B2
To readily cope with even a kelly-bar having diverse sizes and manufactured by different makers by providing an adapter that can drive a kelly-bar having diverse sizes such as an outer diameter or a rib by one driving unit. The adaptor 9...  
JP2002256788A
To provide a double tube excavator capable of entrained easing drilling by means of a retract bit by using a rotary table machine.This double tube excavator is provided with a drive bush 11, a easing 6 engaged in the inner circumference ...  
JP3319700B2  
JP2002242573A
To provide a ground drilling machine which reduces labor and time for drilling work, brings about a reduction in construction cost without requiring an increase in the number of personnel, dispenses with an initial cost, for example, for...  
JP2002242572A
To enable a hole to be efficiently excavated with high vertical accuracy in a short time by controlling a descending speed of a screw rotating drive unit so as not to impose an overload on an auger screw.The auger screw 8 is inserted int...  
JP2002227203A
To obtain driving hydraulic device driving a construction device for preventing the damage of the device or the occurrence of a noise.The construction device driving hydraulic device is so constituted that a hydraulic oil is supplied and...  
JP2002227580A
To provide a means for shortening the time required for passing a core tube through a hard ground and shortening the time required for passing it through an ordinary hard ground further in boring execution work.In a boring method by util...  
JP3333930B2
To reduce a time required for construction by a method wherein flushing water including slime is satisfactorily discharged without regard to the diameter and the full length of an insertion bore with an inexpensive outer casing employed....  
JP2002213172A
To provide a boring device adaptable to soft ground and firm ground.In the boring device 1 for a pile foundation, an excavating tool 8 is provided at a lower end mounted in such a manner as to be freely ascendable/descendable along an ax...  
JP3333822B2
To provide an excavating device capable of shunting an excavating shaft without cutting off a driving transmission mechanism from a driving motor. An excavating rod 77 is connected in series to an excavating shaft 50. An excavating head ...  
JP2002206387A
To facilitate the disconnecting/connecting work of a hydraulic hose without generating an internal pressure in hydraulic thruster cylinders by fixing a Kelly drive when mounting a bucket drive device on a frame.A fixing metal fixture 15 ...  
JP2002168079A
To provide a boring machine which can readily have a vibration generator added thereto by making a simple modification to an existing drill head, dispenses with a special weight, etc., and is high in excavating power, simple in structure...  
JP3295522B2
PURPOSE: To easily connect and fix an auger screw to a driving device that drives the auger screw into rotary motion. CONSTITUTION: A driving device 106 that drives an auger screw of an earth auger into rotary motion is equipped with a m...  
JP2002097882A
To provide a rotary driving device for tool capable of working with the high torque and working with the high-speed rotation.This rotary driving device for tool is provided with an inner shaft driving source 34 for rotating an inner shaf...  
JP3292398B2
PURPOSE: To prevent dispersion of moved earth drilled by means of a drilling device, and improve the strength of drilling members. CONSTITUTION: A cylindrical member 20 covering the outer circumference of the upper part of a casing 6 con...  
JP3260766B2  
JP2002504199A
(57) The control method of rock drilling performed by the rock drill which formed the summary pressure drive hammer and the rotary motor. In this method, the revolving speed of a drill rod is determined based on the value of the control ...  
JP2002030883A
To provide a control device for machine tool easy to control the number of revolution.A hydraulic motor 16 has a variable displacement volume corresponding to the pilot pressure P2 to be led in. A pilot pressure sensor 40 for detecting t...  
JP2002013598A
To form a carrier and an output shaft in a planet gear type speed reduction mechanism as a separate member to be combined together, to make possible a independent replacement and so on thereof, and to reduce costs for dies and workings f...  
JP2002013378A
To prevent a pressure plate from coming into contact with an upper face of a clutch disc to prevent the wear of mutual contact faces when a clutch is not operated.A plurality of engaging pieces 21 are protrudedly provided at outer periph...  
JP3266234B2
To prevent an erroneous operation for selecting a travel mode by forming an electric circuit for exciting a solenoid at the time of closing a circuit of micro switches detecting both neutral positions of a selector lever and a pump laver...  
JP3264394B2
PURPOSE: To improve excavating workability by generating a rotation force and thrust by means of one and the same device. CONSTITUTION: When a drive ring 5 is rotated counterclockwise, a driven gear 7 geared with a ring gear 6 is rotated...  
JP2001342788A
To provide a rod for rock drill having a hard surface layer portion by surface hardening treatment and also having a high internal toughness that is, a decrease in the hardness is gentle from the surface layer to which surface hardening ...  
JP2001336377A
To provide a hydraulic pressure circuit for a foundation work executing machine, which necessarily synchronizes working apparatuses of the machine with each other when they are simultaneously elevated/lowered by two independent plunger p...  
JP2001336378A
To provide a rocking-type all-casing excavator which can sufficiently carry out excavation even into hard ground, and is light in weight and simple in structure.A vertically moving frame 2 is arranged on a base frame 1 via a vertically m...  
JP2001329774A
To provide a rotary table with a lock release confirmation device for easily recognizing from the outside whether lock is released or not when releasing lock between a kelly-bar 3 and the rotary table 6 for driving the kelly-bar 3, in un...  
JP3253896B2
To drill slits smoothly and efficiently while giving uniform revolving torque and striking force to all juxtaposed rods in a drilling machine, in which a plurality of the rods, in which drilling bits are protruded at front ends, are juxt...  
JP2001317283A
To provide an earth drill enabling execution of excavation without lifting of a boom even when the thrust-in force of a thrustor cylinder is the maximum.A boom 2 is erected on a base machine 1 by holding it in stretch from the rear by a ...  
JP2001295574A
To perform boring without adding another rod, by making a guide shell of a boring machine shorter than a rod for boring and by using a long length of rod. A rotating-driving device 5 of the rod 7 gives rotation to the rod 7 for boring an...  
JP3215435B2  
JP2001262969A
To smoothen supply of a cooling fluid to an excavating position to keep satisfactory excavation efficiency.A direct motor 2 is formed of a cylindrical rotor 17 having a cylindrical rotating shaft 11 extending through, a cylindrical stato...  
JP3233710B2
PURPOSE: To construct a shaft having a large diameter accurately while also reducing an outbreak by small energy by inserting a hollow guide pipe into a pilot hole having a small diameter and pushing down the hollow guide pipe while rota...  
JP2001254583A
To provide an excavation construction method for miniaturizing a device and nearly fully preventing excavation force from being transmitted to the device.In the excavation construction method, the excavation device where a crushed body 9...  
JP2001241284A
To provide an efficient excavation device that has fewer troubles, low noise, and excellent cooling efficiency.A direct motor 2 is composed of a cylindrical rotor 17 which a cylindrical rotary shaft 11 penetrates, a cylindrical stator 18...  
JP2001241283A
To miniaturize an excavation device and reduce its weight, and to reduce drilling time and noise.A direct motor 2 is composed of a cylindrical rotor 17 which a cylindrical rotary shaft 11 penetrates, and a cylindrical stator 18 that is p...  
JP2001227273A
To provide a chuck device capable of easily detaching a chuck even when it is hard to detach due to firm clamping of a shaft by the chuck.This chuck device is composed of a chuck holder 41 with an external thread 46 formed at the outer p...  
JP2001227275A
To provide an excavating device capable of shunting an excavating shaft without cutting off a driving transmission mechanism from a driving motor.An excavating rod 77 is connected in series to an excavating shaft 50. An excavating head i...  
JP2001220978A
To perform vertical hole boring work at a job site limited in an upper space, for example, the inside of a tunnel.This vertical hole boring device is provided with a guide casing fastened and fixed to an upper part of the ground to be ex...  

Matches 651 - 700 out of 2,193