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Patent Searching and Data


Matches 501 - 550 out of 1,626

Document Document Title
JP4649518B2  
JP4633454B2
To provide an excavator improving a drainage efficiency and enhancing an excavation efficiency as the result of an improvement in the drainage efficiency because the suction head of a drainage pump draining water (slurry) in an excavated...  
JP2011026887A
To provide a working machine for pulling out a pile, which enables assembling operations for a casing etc. to be easily performed even on a narrow site, because it can perform not only a pull-up operation but also a push-in one.In this w...  
JP2011021374A
To form a straight excavated hole in ground by preventing a deviation of a load and a deflection of a main shaft of excavation during the excavation of the ground.In an excavating tool 13, a casing 10 is externally fitted and mounted on ...  
JP4624285B2  
JP4612937B2  
JP4604061B2  
JP4576085B2
A method and device for controlling a rock drilling machine (51) includes an impact device (5) arranged to act on a drilling tool (52), a rotation motor (7) for rotating the drilling tool (52), and a feed motor (6) for feeding the drilli...  
JP4566805B2  
JP4565709B2  
JP4551601B2
A rock drilling machine comprising a rotating device (1), a percussion device (2) and a shank (17) where a tool (18) is to be fastened. According to the inventive idea, lubricant used for lubricating the shank is supplied in suitable con...  
JP4505479B2
Drilling device comprises a pipe hopper (30) arranged above a drill drive unit (11) and a drill pipe (6) detachedly connected to a drive shaft (19) of the drill drive unit below the drill drive unit. An independent claim is also included...  
JP4486436B2
A restraining arrangement (48) for limiting the separation of a feed table (36) having a pivot pin (106) and a positioner block (30) of a mobile track drill. The restraining arrangement includes a first constraint device (114) positioned...  
JP4485098B2  
JP4472204B2  
JP2010119290A
To solve the problem that a counter-electromotive force is generated in a motor winding of a general-purpose motor by a slip of a motor and a backlash of a drive unit (gear) even if output frequencies of each inverter of a plurality of g...  
JP4453883B2  
JP2010084341A
To provide a drilling unit capable of reducing the weight of a drill pipe without deteriorating drilling capability, and the drill pipe for the drilling unit.This drilling unit (10) includes a drill body (1). The drill body (1) is held i...  
JP4448608B2  
JP2010070969A
To provide a civil engineering excavation device enabling a boring bit installation operation and a drilling rod joining operation to be efficiently and safely performed.A hole allowing a boring bit to extend therethrough is opened in th...  
JP4425290B2
Drilling device comprises a pipe hopper (30) which can be axially displaced with a drill pipe (6) opposite a carriage (22). An independent claim is also included for a method for producing a drilling column in the ground using the above ...  
JP2009299356A
To provide a kelly-bar structure capable of supplying a filler such as a cement milk in an earth drilling machine having a telescopic kelly-bar.This kelly-bar of an earth drilling machine includes an outer kelly-bar 15; a guide pipe 16 c...  
JP2009191492A
To provide road surface drilling equipment and a road surface drilling method, which enable the easy drilling of a hole capable of being controlled to a desired depth and excellent in reproducibility, which can inhibit dust, produced by ...  
JP4308410B2  
JP2009138379A
To provide an existing pipe renewing method which is not a great hindrance to traffic on the ground and which enables the efficient execution of work.In this existing pipe renewing method, holes are excavated in positions corresponding t...  
JP3150680U
To provide an auger drive device capable of performing various pile driving methods by rotating an earth auger and a steel pipe with a common hydraulic motor. An auger mounting shaft 12 and a circle gear 11 arranged coaxially with the au...  
JP2009114744A
To provide an auger device for excavating a ditch by which the ditch can be efficiently excavated using an auger.An auger screw 8 and a rotary casing 9 externally fitted to it are hangingly connected to a rotary drive part 7 of an auger ...  
JP4224596B2  
JP2009013693A
To provide a hydraulic circuit which can switch a speed for rotating a rotational mechanism in multiple stages, and achieves the switching at a low cost.The hydraulic circuit is provided with hydraulic motors operable by pressure oil sup...  
JP4197385B2  
JP2008267129A
To provide a boring drill for quickly discharging waste, after boring.A power motor is combined with a screw shaft 2 and a drill head axis shaft 1 and is constituted by coupling this combination with a frame by a fixing plate 21. The axi...  
JP2008255765A
To solve the problem that a pile hole is obliquely formed because a presently mainstream pile hole drilling unit employing a hydraulic motor as a driving source cannot detect a precise N-value in real time during ground drilling operatio...  
JP4171161B2  
JP2008208599A
To provide an auger device capable of preventing a following auger device from colliding against a core member of a preceding element and not only reducing vibration and noise but also improving efficiency of excavation and precision of ...  
JP4134288B2  
JP2008174981A
To provide a column building-up device and a column building-up method, easy in construction, by preventing rotation of a column to the ground surface.This column building-up device 1 has two excavation rods 26 and 27 in parallel, and is...  
JP4121715B2  
JP3143134U
To provide a hydraulic drilling device for mounting a power excavator which is safe and has high work efficiency. A hydraulic motor for rotating a drilling machine for rotating a drilling machine having a cylindrical drilling blade porti...  
JP4106304B2  
JP2008138398A
To provide a method for carrying out heat pipe snow-melting at a low cost.This heat pipe snow-melting method utilizing ground heat obtained through a heat pipe 1 buried underground comprises steps for burying an excavating body A with an...  
JP2008517779A
The invention relates to a drill bushing for engagement with a drilling steel, wherein said drill bushing ( 2 ) has contact surfaces ( 4 ) for contact with a drilling steel ( 1 ), said contact surfaces ( 4 ) having interior, inwards curv...  
JP2008095276A
To secure the quality of a continuous underground wall by eliminating a discontinuous portion when the continuous underground wall is formed and suppress the cost by eliminating the need of additional works by providing an excavator capa...  
JP4061874B2  
JP4049015B2  
JP4046851B2
A new masonry drill has a shaft (2) with clearing spirals (3), the tip (5) being entirely in hard material, bonded to the end face of the shaft. It comprises a main- (6) and auxiliary cutters (7, 8) each located along diagonals of the dr...  
JP4035433B2  
JP4034196B2  
JP4015083B2  
JP2007291693A
To provide a rock bit apparatus with a striking mechanism, which has a compressed air feeding line and a second fluid pressure feeding line. The rock bit apparatus with the striking mechanism has arranged therein the compressed air feedi...  
JP2007291807A
To provide a foundation machine and a method for attaching and removing shaft bodies capable of lengthening shaft bodies by addition or their removal at a working place above which obstacles are present and efficiently performing work su...  

Matches 501 - 550 out of 1,626