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JP2784454B2 |
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JPH10205258A |
To improve a function by installing a guide cylinder with a stabilizer capable of being expanded and contracted in the horizontal direction into a casing tube and dropping a ram in the guide cylinder. The chisel 10 is composed of a guide...
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JPH10169358A |
To improve striking force by forming a piston of a metallic material having specific gravity higher than steel in a rock drill, in which the piston installed into a cylinder void longitudinally movably is shifted at fluid pressure and th...
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JP2573780Y2 |
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JP2573778Y2 |
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JP2750274B2 |
PURPOSE: To enable the easy and rapid excavation of a relatively narrow and shallow shaft such as a shaft excavated at the time of constructing a domestic sewage pit, for instance. CONSTITUTION: A cylindrical excavating pipe 1 is erectly...
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JP2567334Y2 |
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JPH1047590A |
To reduce a cost of a lubricating oil tank by eliminating necessity for forming the lubricating oil tank to resist against a high pressure. In this halfways of an air pipe line 1 supplying lubricating oil L with compressed air A to the i...
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JP2561212Y2 |
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JP2560502Y2 |
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JPH1018751A |
To improve strength by forming a drain passage among a housing, a control valve chamber and a cylinder, and making a piston solid. When a piston 6 strikes a drill bit 4, an impact passage 15 and a drain passage 14 are connected, and a pi...
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JP2680433B2 |
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JPH09287379A |
To discriminate lithological quality properly by automatically detecting the number of the striking times of a rock drill at a real time. This detector for the number of the striking times of a rock drill is composed of a striking-pressu...
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JP2655313B2 |
A device for driving a drilling and/or impacting tool comprising a shaft (1), which is arranged, if necessary, in a rotatable manner in a housing (6), and one end of which is adapted to be fastened to the tool, whereas the other end is a...
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JP2546499Y2 |
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JPH09174461A |
To destroy a material without changing a fluid cross flow quantity by setting the delay time changeable by the operating pressure released by a shock piston, first applying a return stroke to the shock piston during the delay time, then ...
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JPH09165985A |
To reduce influences of impulses, by holding sensitive instruments against impulses like a transmitter for positional detection by separating them from the chamber wall containing instruments to the main impulse direction with attenuatin...
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JP2620836B2 |
PURPOSE: To enhance the working efficiency by providing an air compressor device for operating an actuator, so that all the adjustment of a rock drill and the operation of attachments can be enabled in the state seated in the driver's se...
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JP2622529B2 |
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JP2613538B2 |
PURPOSE: To draw out a bit easily by changing over a valve when the bit can not be dravm off after the boring work, supplying oil pressure to a reverse cylinder, and giving a backward striking force to a shank rod. CONSTITUTION: Oil pres...
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JP2535470Y2 |
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JPH0978970A |
To improve the stability and workability of a working machine while ensuring the safety of a worker and perform large bore rock mass drilling efficiently. A casing 9 is rotatably suspended and supported to a hook 7 of a crawler crane 4 t...
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JP2528822Y2 |
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JPH08511841A |
PCT No. PCT/GB94/00837 Sec. 371 Date Oct. 20, 1995 Sec. 102(e) Date Oct. 20, 1995 PCT Filed Apr. 20, 1994 PCT Pub. No. WO94/23906 PCT Pub. Date Oct. 27, 1994A rock drill with a percussion mechanism which includes a piston, a body in whic...
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JPH08511842A |
PCT No. PCT/GB94/00851 Sec. 371 Date Oct. 19, 1995 Sec. 102(e) Date Oct. 19, 1995 PCT Filed Apr. 21, 1994 PCT Pub. No. WO94/24403 PCT Pub. Date Oct. 27, 1994A rock drill which includes a main body with a chamber which is formed in the ma...
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JPH08260872A |
PURPOSE: To enhance a drilling capacity and save the labor of workers, while maintaining the flexible movement of a drill available on hand. CONSTITUTION: A wheel 2 is installed on the tip of a linear frame 1 while a stool 5 is installed...
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JP2537370B2 |
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JPH08246777A |
To protect a bearing from contamination. This boring machine 10 is provided with a cutter head 14 rotatably attached to a hydrostatic bearing 30. High pressure water is supplied to a passageway 35 between confronting bearing surfaces 33,...
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JP2528732B2 |
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JP2527674B2 |
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...
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JP2519659B2 |
PURPOSE: To suppress the scattering of dust generated at boring, in a machine drill used by mounting on the arm of a back hoe, to improve working environment, and allow the preliminary set of the boring depth to automate the boring work....
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JP2511228B2 |
PURPOSE: To improve work efficiency and cutting efficiency and to improve chipping precision and safety by a method wherein a work to chip concrete of the inner wall of the comparatively small scale tunnel of a hydraulic power plant is a...
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JPH08165880A |
PURPOSE: To automate the rock positioning work by extracting the contour of a rock from the intensity information of an image acquired by a camera, calculating a centroid, calculating the difference between the centroid and the center of...
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JPH08158775A |
PURPOSE: To make it possible to execute drilling work with safety by installing a lift base to a guide rail pipe so as to mount a rock drill thereto and suspending and lifting up the machine by way of a wire drum with a head motor. CONST...
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JPH089943B2 |
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JPH0752466Y2 |
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JPH07301083A |
PURPOSE: To make it possible to strike in front and strike reversely by means of one and the identical piston. CONSTITUTION: In a hydraulic down the hole drill's striking mechanism which forms a front oil chamber 3 and a rear oil chamber...
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JPH07293185A |
PURPOSE: To improve the operating efficiency, by setting the working condition combining the working parameters including 'the impact number of a bit, the rotation frequency, the feeding speed, and the like, depending on the detected val...
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JPH07100307B2 |
A hydropneumatic hammer operated by a reciprocal action of a percussive piston and a directional control valve, comprising a piston having steps of larger and smaller diameters separating the interior of a piston chamber intended for adm...
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JPH0799077B2 |
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JPH0746468Y2 |
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JPH0742619Y2 |
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JPH0742618Y2 |
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JPH0785869B2 |
The invention relates to an arrangement for the axial bearing of the drilling machine. The drilling machine thereby comprises a body (6), a percussion device (1) fitted in the body, and a rotation bushing (3) functioning as a rotating me...
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JPH0738461Y2 |
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JPH0742859U |
[Purpose] We provide a boring rod that improves excavation efficiency by forcibly discharging underground shavings (slime), muddy water, etc., and can perform work without damaging the hole wall of the drilling hole. [Constitution] In th...
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JPH07205047A |
PURPOSE: To provide a fluid-actuated impact hammer capable of being used for advancing an object into the ground and extracting it without requiring switching work at all. CONSTITUTION: This impact hammer is provided with a working pisto...
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JPH0731358Y2 |
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JPH0728233Y2 |
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JPH07158377A |
PURPOSE: To operate each of actuators under an optimum condition in conformity with operating conditions by joining or branching a discharged pressure oil of each pump for striking, feeding and rotation services of a boring mechanism in ...
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