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Patent Searching and Data


Matches 501 - 550 out of 781

Document Document Title
JPH0693787A
PURPOSE: To position a rock drilling device close at hand during drilling, and to automatically operate the device when a backhammer is required. CONSTITUTION: The rock drilling device comprises a backhammer unit 10 in which a hammer pis...  
JPH0588345B2  
JPH05321569A
PURPOSE: To make it possible to promote reliability of a boring machine, to enable the replacing of a dust seal and to make it possible to easily change the existing boring machine into a waterproof one. CONSTITUTION: The rear end of a h...  
JPH0583715B2  
JPH05311967A
PURPOSE: To prevent large noises and increase drilling efficiency, by giving a torque and an oscillating force in the axial direction to the main shaft connected with a boring rod at the front end. CONSTITUTION: A torque is given to a ma...  
JPH05280033A
PURPOSE: To place a screen pipe having a high degree of water correcting efficiency simultaneously with drilling in a screen pipe placing process. CONSTITUTION: A rotary percussion drill 2 in a device for placing a screen pipe 6 is compo...  
JPH05272284A
PURPOSE: To make it possible to carry out auger boring even if the soil to be drilled is hard. CONSTITUTION: In a soft soil at the tip of an auger 3 which is intended for drilling, a rotary drilling process may be carried out to drill th...  
JPH0560029B2  
JPH05187177A
PURPOSE: To prevent the rupture of a fitting shaft by forming a small-diameter section deflected within the allowable stress on the drill fitting shaft, and deforming the drill fitting shaft within the allowable stress to distribute the ...  
JPH05179884A
PURPOSE: To enable a collet chuck for gripping a rod pierced therein to grip and release the grip rapidly with strong force in a through type striking hammer device. CONSTITUTION: In a collet chuck 5, a collet 25 is provided at the outer...  
JPH0547087U
[Objects of the Invention] The hydraulic pump control device of the boring machine which controls the amount of discharge flow of the main hydraulic pump of the above-mentioned excavator at the time of the boring process of the boring ma...  
JPH0536595B2  
JPH0532484U
[Objects of the Invention] The deflection of a hammer rod is prevented in the hammer excavator which excavates by moving the hammer rod inserted into the casing to a casing radial direction. [Elements of the Invention] A bracing device i...  
JPH0598885A
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...  
JPH0524314B2  
JPH0586794A
PURPOSE: To incorporate a desired improving and stabilizing process for the ground of various earth layers including a weak earth layer and a hard rock layer with the use of a general purpose hydraulic rock drill, in a tunnel excavating ...  
JPH0516893U
[Objects of the Invention] It aims at sharing conventionally blow rotation punching for which two devices were required, and rotation punching with one device. [Elements of the Invention] Powerful impelling force, a blow rotation boring ...  
JPH0533589A
PURPOSE: To make it possible to form an improved longer column in an injection stirring type fore-piling method. CONSTITUTION: In a tunnel excavation method, boring is made by means of a drill unit equipped with a double pipe mounted on ...  
JPH0477115B2  
JPH0465198B2  
JPH04231588A
PURPOSE: To prevent unexpected direction deviation caused by the soil-biting failure of a drill head due to the sudden change of the nature of soil. CONSTITUTION: A pipeline 18 is included between a motor 15 and a boring unit 20 for givi...  
JPH0477689U  
JPH04146393A
PURPOSE: To hasten the speed of excavation for great deep excavation by a method in which a turning force and an impact force are given to an outer casing having a bit on its tip and a hollow inner rod from the ground's surface for small...  
JPH0417664Y2  
JPH0473395A
PURPOSE: To perform excavating-advancing work efficiently by transmitting impact motion to be generated at the time of the explosion combustion of an internal combustion engine set in an excavating-advancing machine main-body, as an impa...  
JPH0464685A
PURPOSE: To improve the extent of operation efficiency by locking a leading bit, drilling a circular sectional hole, to the tip of an adapter, and fitting a tubular bit for forming a slit provided with a cutting edge projecting to the si...  
JPH0449397A
PURPOSE: To efficiently crush rocks, by providing rotation and blow at the bit of a rotary percussion drill to drill a preliminary hole on a rock and pushing down a wedge by a drive rod to push out the wedge and pressing the bored hole t...  
JPH0420693A
PURPOSE: To reduce the cost of construction for a deeply excavated hole by providing rotating and percussing driving sections to the base end of a spiral rod provided with a bit in which air outlet holes are bored to continue excavation ...  
JPH0414590A
PURPOSE: To enhance the efficiency of boring work and, at the same time, to greatly reduce the manufacturing cost of a steel bar by holding the steel bar with wedges to rotate, and transfer axial percussion force of a drift to the steel ...  
JPH044988U  
JPH03128728U  
JPH03290589A
PURPOSE: To shorten the length of a device by installing a chuck in a base end of a drill head providing with a rotation generating part and an impact generating part, and setting up a hollow spindle as piercing through those of drill he...  
JPH03250192A
PURPOSE: To efficiently remove digging chips, excavated by bits implanted in a block end of a digging tool, by connecting an exhaust hole, provided in the center of a device, to a through hole in a block point end surface and blowing out...  
JPH03250190A
PURPOSE: To improve a lift of a digging tool by forming the periphery of almost semicircular blocks of a circular arc of different radius and the block, placed in a side of protruding from the peripheral surface of a device when it is ro...  
JPH03250189A
PURPOSE: To apply rotation and impact reaction force at a right angle to a bit so as to prevent its damage by forming a tilt surface in an end part of both blocks of a device, which receives impact force of a hammer and turning force of ...  
JPH03250191A
PURPOSE: To prevent digging chips from infiltrating into an axial hole of a digging tool while efficiently removing the digging chips by providing an exhaust hole in the center of a device, forming a through hole in a block shaft and con...  
JPH0360606B2  
JPH03202505A
PURPOSE: To propel improving work on any ground by applying a rotating and striking force to a hollow driving drum set for enabling sand to be always cast in the axial core of a boring machine. CONSTITUTION: On the axial core of a boring...  
JPH0336632Y2  
JPH03172494A
PURPOSE: To facilitate the continuous drilling of an annular hole or a slotted groove by making crush depth less than the strike rebound quantity of a rod, then feeding a drilling machine laterally and continuously in the right-angled di...  
JPH03161688A
PURPOSE: To establish a simple boring device by coupling a water pressure supply pipe to a control device of a thrust unit, and further to a hammer drill, and using a flush water for hammer bit as the power for driving the drill. CONSTIT...  
JPH03125784A
PURPOSE: To prevent the degradation of the ground by a method in which a vertical pit is excavated by a striking hammer while turning an excavating hammer set in a casing with rotation of the casing, and only the excavating hammer is tur...  
JPH0363383A
PURPOSE: To permit operations on narrow scaffolds by a method in which a shaft tube is set around a casing and given turning forces and striking forces, and the coupler of the shaft tube is faced with a rotary wall and an excavating wall...  
JPH0355386A
PURPOSE: To increase striking force of an outer bit by making the outer bit apart from a casing tube and movable in the longitudinal direction and driving the outer and an inner bits in rotary motion with the casing tube and, at the same...  
JPH0343590A
PURPOSE: To easily manufacture and work a member and to reduce the cost by alternately conducting the pressurized air to both ends of a hammer piston for longitudinally reciprocating the same, after an arbor is constrained against the mo...  
JPH0333393A
PURPOSE: To dispense with a fixing ring by providing a tool with a set of center rods comprising a number of rods, and a set of connected tubes surrounding the rods, and making the projections on the rods pass through grooves of elastic ...  
JPH0333394A
PURPOSE: To prevent the outflow of a medium by comprising a device for supplying a flushing medium to a space between a set of rods and a set of tubes, mounting a lip on one of elastic bushings guiding the rods, and sealing and opening t...  
JPH03500559A  
JPH02145282U  
JPH02504175A  

Matches 501 - 550 out of 781