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JPH05138549A |
PURPOSE: To constitute a hydraulically driven striking mechanism so that the striking times, a returning stroke and coherent striking energy of a striking piston may be automatically applied to the other work conditions by the adjustment...
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JPH05131379A |
PURPOSE: To continuously reduce the output of a hammering mechanism, and simultaneously, to the slightly reduce the hammering times of the hammering mechanism when pressure exceeds a specified limit value based on the load of a rotationa...
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JPH05113092A |
PURPOSE: To make a percussion mechanism for a drill rod unit usable at an acceptable hole drilling work cost adaptively to various work conditions and, particularly, economically and easily execute such difficult hole drilling work that ...
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JPH0513509Y2 |
An impact device that consists of a housing having a bore, a piston, and a change-over valve for control of the reciprocal movement of the piston is presented in the present invention. In the present invention, it is not necessary to emp...
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JPH0571290A |
PURPOSE: To miniaturize a drill and, at the same time, to promote boring capacity. CONSTITUTION: A drilling bit 4 is provided to the front end of a casing 1, a piston 7 capable of reciprocating motion is housed in the casing and, at the ...
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JPH0516990B2 |
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JPH05500991A |
Impact rippers are useful, for example, in fracturing rock and other hard material which is to be excavated. Known systems using structures which mount the impact hammer and the linear ram within a single housing transmit vibrations into...
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JPH055993B2 |
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JPH055603A |
PURPOSE:To obtain a stroke detector for a piston which allows accurate detection of the behavior of the piston in an engine in which the piston reciprocates within a cylinder under severe application conditions, for example, rock drill. ...
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JPH05190B2 |
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JPH0452283Y2 |
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JPH0477115B2 |
PURPOSE:To reduce the size of a well sinking machine by stretching a chain for moving a drill rod up and down across a guide frame and a drive unit therefor and a rotary unit for rod thereby enabling drilling and intermittent dropping th...
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JPH04315696A |
PURPOSE: To achieve operation of a reversible impact-operated boring tool in a reverse direction by terminating supply of control fluid being secondary pressurized fluid, without terminating supply of primary pressurized fluid which enab...
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JPH0444705Y2 |
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JPH0444704Y2 |
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JPH0465198B2 |
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JPH0458557B2 |
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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...
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JPH04203034A |
PURPOSE: To facilitate decision of the position of a drive device by a method wherein an angle detecting device is located to a slewing device part, a drive device position display device is located in a driver's seat, and an upper slewi...
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JPH0482091U |
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JPH04194128A |
PURPOSE: To promote ventilation of gas, generated at the interior of a counter weight and drying of an internal filler by a method wherein an inlet and an outlet for air are formed in proper positions in the counterweight, and the flow o...
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JPH0418783Y2 |
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JPH0417664Y2 |
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JPH0420078B2 |
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JPH04501446A |
PCT No. PCT/EP90/01353 Sec. 371 Date Apr. 23, 1991 Sec. 102(e) Date Apr. 23, 1991 PCT Filed Aug. 17, 1990 PCT Pub. No. WO91/02880 PCT Pub. Date Mar. 7, 1991.A drilling device including a hydraulically actuated drive for exerting an oscil...
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JPH0476184A |
PURPOSE: To improve the extent of operation efficiency by installing each dry stroke detector in both hydraulic circuits of a main drifter stroking the rear end of a swing plate and a side drifter stroking the rear end of a side drill re...
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JPH045596Y2 |
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JPH045597Y2 |
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JPH042638A |
PURPOSE: To reclaim removed fill at a low cost and to settle pollution problems by heating under pressure fill removed from the site ground to effect sintered solidification followed by crushing and classification and by kneading the pro...
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JPH0348316Y2 |
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JPH0348317Y2 |
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JPH0344870Y2 |
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JPH0372993U |
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JPH0342949B2 |
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JPH03502825A |
(57) [Abstract] Since this gazette is application data in front of an electronic application, the data of an abstract is not recorded.
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JPH0320359Y2 |
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JPH0325646U |
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JPH0333396A |
PURPOSE: To save man power by a method in which a balance rod with a weight is connected to the other end of a pump cylinder set in a drill machine and the drill machine is vertically operated by applying pressures similar to or higher t...
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JPH0333395A |
PURPOSE: To excavate the ground with high efficiency by a method in which a hot spring sampling mechanism is attached to one end of a balance rod pivotally attached to the upper part of a tower and a weight is attached to the other end, ...
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JPH032633B2 |
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JPH032488A |
PURPOSE: To curtail the construction cost and the period of the construction by a method in which a back hoe is set below steep-sloped ground, and the ground is excavated by a drill hammer attached to the tip of the back hoe. CONSTITUTIO...
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JPH02303775A |
PURPOSE: To reduce the weight of a piston return means so as to simplify its structure by sliding and bringing a strike piston into contact with a cylinder such that an annular piston is freely moved in the vertical direction of the stri...
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JPH02504410A |
PCT No. PCT/EP89/00256 Sec. 371 Date Nov. 8, 1989 Sec. 102(e) Date Nov. 8, 1989 PCT Filed Mar. 11, 1989 PCT Pub. No. WO89/08769 PCT Pub. Date Sep. 21, 1989.A drilling apparatus, especially for drilling blast holes, includes a carriage, a...
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JPH02145979U |
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JPH02144096U |
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JPH02504175A |
PCT No. PCT/SU89/00095 Sec. 371 Date Mar. 2, 1990 Sec. 102(e) Date Mar. 2, 1990 PCT Filed Apr. 14, 1989 PCT Pub. No. WO89/11022 PCT Pub. Date Nov. 16, 1989.A hydraulic drilling machine comprises a drill tool (1) connected to a hydraulic ...
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JPH02503214A |
A device for making wells in the ground comprises a striking mechanism (1), a cylindrical casing (15) provided in its upper part with a flange (16) and with an inclined surface (17) located below the flange (16). A cap (18) with a throug...
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JPH02224983A |
PURPOSE: To feed enough coolant to a cut blade by energizing a turbine rotor partially in the axial direction by liquid stream, activating a collection nozzle, which is arranged at an outlet of the rotor to collect the liquid stream afte...
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JPH0293386U |
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JPH0274184U |
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