Login| Sign Up| Help| Contact|

Patent Searching and Data


Matches 651 - 700 out of 2,143

Document Document Title
JP2001214683A
To provide a drill rod capable of being used for a long time by preventing the abrasion in a screw section.The surface of a joint screw is provided with a hardening layer prescribed as follows. 1) The hardening layer has 0.2 to 2.5 mm in...  
JP3217997B2
To install a frame more easily on a guide rail. To a frame 10 in which an auger drive mechanism is incorporated, a sheave block 36 on which a suspension sheave 20 is rotatably supported is detachably connected to be rotatable around a su...  
JP2001207435A
To load and unload a boring rod, and to collect an inner tube of a wire line sampler in a state that a drive head device equipped with vibrators is left in a boring center.A hollow section 25, passing through from up to down, is provided...  
JP2001200684A
To provide a casing auger device and a casing auger construction method capable of excavating the hard ground efficiently with a simple structure. This casing auger device comprises a casing 11 storing a built-in auger 18 and a tubular c...  
JP2001193819A
To provide a rotary driving device which is possibly variable and used for underground or rock-bed boring device. Gears are connected to motor spindles 34 to 36 by respective clutch devices 4 to 6, and composed of a plurality of pinions ...  
JP3205869B2
To provide a drilling device requiring no installation work as well as withdrawal work or the like for a rotational reaction force holding pedestal. This drilling device is directly or indirectly suspended by a crane, and it is constitut...  
JP2001182067A
To improve safety and work efficiency by using an improved rock drill in a method of boring a water retaining hole for vegetation on a face of slope. A handle of a rock drill A is improved to get safety and work efficiency, and an operat...  
JP2001173350A
To provide and excavator capable of being finely made to cool a bit and to eject chip by making air flow toward the front end side of a rotary shaft at a high speed to compress the air.A turbo-blower section 21 is constituted by fitting ...  
JP2001173349A
To compactly constitute a lubricating mechanism for lubricating a change gear provided in an excavating apparatus driving device for a ground excavator by means of an appropriate lubricant and to obtain sufficient efficiency of a space.T...  
JP2001164860A
To provide a double pipe type drilling tool capable of preventing the damage of a connection section caused by striking force and reducing the impact force, vibration, and noise at a strike even when a polyvinyl chloride pipe or a thin s...  
JP2001164859A
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 ...  
JP2001164866A
To provide a ground excavator improving the efficiency of the excavation left work without making two actions with the right land and preventing an erroneous action.This ground excavator is provided with a kelly bar winding/ unwinding le...  
JP3198087B2
To provide a dewatering method capable of greatly enhancing the working efficiency. When installing an apertured outer pipe 24 in ground, the thrust, rotation and impact from a drifter 42 are transmitted to a drilling bit 20 through an i...  
JP3193985B2
To increase efficiency in excavation by forming a boring rod as a double tube structure forming a slime discharge space, and arranging a gathering part in the middle of slime discharge passages. When a boring rod is driven into the groun...  
JP2001140571A
To provide a drill mechanism for a blasting rock drill capable of safely conducting the work and sharply reducing the cost. This drill mechanism for the blasting rock drill is provided with a rod base 16 moved and driven in the longitudi...  
JP2001115762A
To increase the efficiency in handling an operation oil supply hose. Connection outlets 4 are provided on both side surfaces of the hydraulic auger equipment 1, and hose holding arms 5 are made mountable on both side surfaces.  
JP2001115763A
To reduce the sizes and weights of soundproof covers or the like and provide a soundproof apparatus for a rotary percussion drill having good operability, excellent safety and high soundproof effect. A drill head 4 and a cleaning swivel ...  
JP3182388B2
To provide a drilling method capable of easily securing the linearity of a pipe body to be inserted to natural ground and smoothly discharging slime. In this drilling method, an inner rod 22 coupled to a drilling bit 20 and an outer pipe...  
JP3182389B2
To provide a drilling method capable of smoothly discharging slime. In this drilling method, an inner rod 22 coupled to a drilling bit 20 and an outer pipe 24 for housing the inner pipe rod 22 inside the pipe are used. The inner pipe rod...  
JP2001107671A
To prevent the turning part of an excavating pipe from damaged caused by restraint of the turning part in an excavated tunnel. The drive controller 1 is used for an excavating device and especially, it has a feature that an AC induction ...  
JP3179041B2
To avoid the impossibility of excavation starting attributable to the voltage drop of a generator when an electric motor is subjected to an excessive load. This ground excavator is provided with a rotary drive means 5 having an electric ...  
JP2001098869A
To provide a non-circular excavating method for excavating a hole having a regular polygonal cross section, without marring the advantage of rotary movement. There is provided a method for excavating a hole H in a shape of a regular poly...  
JP2001098870A
To provide method for determining a non-circular figure for excavating a hole having a regular polygonal cross section, without marring the advantage of rotary movement. There is provided a method for excavating a hole H, in a shape of a...  
JP2001083224A
To accurately measure a magnetic flux density even during rotating. The apparatus for measuring a magnetic field comprises a three-axis magnetic sensor TMM having sensitivity axes in directions x, y and z, a two-axis acceleration sensor ...  
JP2001073661A
To provide an earth auger capable of performing efficient excavation according to various types of ground conditions without causing power loss and lowering excavating speed. This earth auger 1 is formed so that an excavating head 8 with...  
JP3151608B2
To synchronously turn an auger driving device and a lower swing preventive device by hydraulic circuits having the simple constitution. An auger driving device arranged in a leader of a pile driver so as to be ascendable/descendable, is ...  
JP2001020648A
To provide a hydraulic driving device operating a diameter-expanding blade mechanism in an undercut driving drilling device forming a diametral expanding section in its midway to a hole drilled in concrete or soil.The undercut drilling d...  
JP2001012178A
To provide an electric earth auger capable of eliminating a power generation device mounted in a rear part of a base machine and driving a power generator by an engine of the base machine.In an electric earth auger in which a leader erec...  
JP2001011855A
To provide pile installation by inner excavator capable of synchronizing with expansion control of a forced cylinder to drive a risng and falling hydraulic motor and making simply earth-moving operaion.An auger driving device 10 for driv...  
JP2000356089A
To provide a method and device for excavating a vertical shaft that can easily collect and discharge the excavated soil for enhanced efficiency of excavation by avoiding the use of a hollow pipe that penetrates the ground to be excavated...  
JP2000320282A
To provide a drilling device requiring no installation work as well as withdrawal work or the like for a rotational reaction force holding pedestal. This drilling device is directly or indirectly suspended by a crane, and it is constitut...  
JP2000320281A
To transmit a torque of a single auger to an output coupling to obtain a reverse torque against the output coupling from a reversal output coupling by connecting the input coupling of an output changeover device to the output coupling of...  
JP3127307B2
PURPOSE: To avoid the jamming of a double pipe, and to enable the boring of a long hole even in any condition of the ground by using a device that is made up of a center-hole drifter or the like, when boring is carried out by giving a ro...  
JP3119467B2
PURPOSE: To eliminate loss of soil discharge quantity due to reverse rotation of a screw in the case of carrying out foundation improvement by way of injecting a solidifying agent and to certainly carry out soil discharge in required qua...  
JP2000265770A
To provide accurate synchronous rotation by connecting hydraulic motors in series and compensating internal leakage through a refilling circuit and also to enable switching over an arbitrary hydraulic motor easily to an independent drive...  
JP2000265769A
To eliminate the fluctuation of the number of revolution of respective ahydraulic motors due to oil leakage brought when a plurality of hydraulic motors are connected by transmission means to give an interlocking mition and connected in ...  
JP3088097B2  
JP2000226978A
To supply electric power to an auger without providing a control board and without enlarging the size of a generator. In the power generation device of an earth auger machine driven by an electric motor such as an auger screw, an open ph...  
JP2000220372A
To provide a reverse-type shaft-excavating machine having a means which prevents drill pipe or the like from being clogged with gravels and prevents the working efficiency from decreasing. A control part 15 preventing gravels from passin...  
JP2000204877A
To provide a method of placing a reinforcement into a soil mortar forepoling capable of rapidly placing the core material in tunneling. A method of placing a reinforcement into a soil mortar forepoling comprises a preparation work stage ...  
JP3067236B2  
JP3066772B2  
JP3067237B2  
JP3067627B2  
JP3064460B2  
JP3055072B2  
JP2000154691A
To provide a hard-rock layer excavator capable of excavating a hard rock layer by a simple facility.The hard-rock layer excavator has a roll-drive mechanism having a kelly-bar 10 inserted into a pit hole excavated up to a hard rock layer...  
JP2000145347A
To provide a guide device for preventing the bending of kelly-bar of earth drill, which has a simple construction and is low in cost. A reel table is attached to the lower part of a kelley drive device 5 through a center joint 9. A joint...  
JP2604528Y2  
JP2000130067A
To take in sediment easily in casing pipe in the excavation of a relatively large-diameter well. A plurality of wings 30 are provided in a rotary casing pipe 2, at the lower plane of the wings, provided are a plurality of sediment guide ...  

Matches 651 - 700 out of 2,143