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JPH07158376A |
PURPOSE: To improve a common and versatile use and operability of a control equipment by installing a change over switch, a potentiometer and a proportional control device or the like to an operation lever and making controllable traveli...
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JPH0726475Y2 |
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JPH0741548B2 |
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JPH0716797Y2 |
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JPH0735717B2 |
A percussion drilling apparatus for drilling bore holes into subterranean formation in which a plurality of drill rods are arranged in concentric rows in a drill bit housing, each rod having an impact tooth at its lower ends and the rods...
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JPH0733758B2 |
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JPH0714475Y2 |
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JPH0730666B2 |
Disclosed is a two piece drill chuck for use with downhole drills and the like. The new chuck features a replaceable wear collar portion which permits optimum material selection and heat treatment for each part of the chuck thereby exten...
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JPH0713986Y2 |
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JPH0712473Y2 |
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JPH0718308B2 |
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JPH0716895B2 |
1. An arrangement comprising a carrier unit (3; 103) and an impacting unit (2; 102; 202) which is disposed inside the carrier unit, is connected thereto via resilient damping elements (31; 131; 231, 231a; 331, 331a) and contains a piston...
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JPH0742475A |
PURPOSE: To promote boring capacity in the case boring is made in a mass of concrete, a rock or a bedrock and, allow the device to twin in a small space. CONSTITUTION: A hydraulic driving type portable rock drill A is mounted to a drivin...
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JPH0742150A |
PURPOSE: To provide the driving device and driving method of a steel pipe used for earth retaining or as a stud pipe of an anchor, which is easy to carry into a site in particular, can be assembled, disassembled, and self-erected, can dr...
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JPH0734772A |
PURPOSE: To promote reliability and long life of an equipment by forming a chemical vapor deposition layer excellent in smoothness with high hardness in furious part of abrasion such as a spiral groove, etc., of a rifle piston. CONSTITUT...
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JPH072776Y2 |
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JPH06341403A |
PURPOSE: To dispence with a protection net of accumulator of a hydraulic down-the-hole drill and improve response speed. CONSTITUTION: In a tube body 11 a multi-pipe structure is provided. A working oil path 17 and an annular space conce...
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JPH0647992Y2 |
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JPH0698532B2 |
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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JPH06328371A |
PURPOSE: To provide a fluid operation impact hammer capable of not only advancing an object into the ground effectively but also simplifying pulling out greatly. CONSTITUTION: A work piston 22 gives an impact to a transmission element 23...
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JPH06510341A |
PCT No. PCT/SE92/00412 Sec. 371 Date Dec. 10, 1993 Sec. 102(e) Date Dec. 10, 1993 PCT Filed Jun. 12, 1993 PCT Pub. No. WO92/22727 PCT Pub. Date Dec. 23, 1992When driving a tube (24) into the ground, primarily for subsequently loading the...
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JPH0689626B2 |
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JPH0686791B2 |
An arrangement for mounting of a rotation element in a drilling machine comprising a body (1) and a rotation element (8) mounted by means of bearing surfaces (8a, 8b) rotatably in the body for rotation of a drill shank (9). The rotation ...
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JPH06297218A |
PURPOSE: To provide a hand-carried device, including a chisel, a drill and an impact drill, with a tool for assuring torque transmission without causing un expected wear when held by a tool holder, and the tool holder for holding the too...
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JPH0671714B2 |
A hydraulic striking device (1) includes a percussion piston (3) which reciprocates in an operating cylinder (2) and strikes a bit (4). The reciprocation is governed by a control valve (10) which is connected to the operating cylinder by...
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JPH0650033B2 |
Method and apparatus for driving projectiles into the ground to acquire useful information about the soil and underlying strata of the earth. The projectile (12) is attached to an oscillating hammer (14) by a resilient spring-mass-spring...
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JPH0647904B2 |
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JPH0619670Y2 |
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JPH0631522B2 |
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JPH0631523B2 |
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JPH06114755A |
PURPOSE: To provide a base rock excavator and a base rock excavating chisel with small size and light weight and further with powerfulness,whereby work for excavating a base rock in a mountain district can be efficiently and safely perfo...
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JPH06503621A |
PCT No. PCT/EP92/02434 Sec. 371 Date Jun. 22, 1993 Sec. 102(e) Date Jun. 22, 1993 PCT Filed Oct. 23, 1992 PCT Pub. No. WO93/08363 PCT Pub. Date Apr. 29, 1993.A pneumatic hammer is provided with an adjusting piston (37) dependent on the s...
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JPH06503622A |
PCT No. PCT/EP92/02435 Sec. 371 Date Jun. 22, 1993 Sec. 102(e) Date Jun. 22, 1993 PCT Filed Oct. 23, 1992 PCT Pub. No. WO93/08364 PCT Pub. Date Apr. 29, 1993.A pneumatic hammer is provided which includes a working piston (16) movable in ...
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JPH06108770A |
PURPOSE: To ensure maximal use under the conditions of various rocks of a rock drill while carrying out the remote control of connection release in the case of a slot drill. CONSTITUTION: The drill device operates a drill steel-tool asse...
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JPH0628484U |
[Purpose] A means of connecting to a rock crusher, an air breaker, or an air compressor, and the rock crusher himself can prevent the compressed air from blowing out on the spot, or automatically compresses even if the connection with th...
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JPH0620648B2 |
The percussion drill apparatus is comprised of a drill spindle which powers the chuck, and the connection for rotation of the drill chuck to the drill spindle is by way of at least one coupling element which is secured in retainers respe...
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JPH0681574A |
PURPOSE: To improve the velocity characteristic of a piston and to enhance the use efficiency of energy by providing a stator of a linear motor in a cylinder so that the piston attached thereto with an armature is reciprocated in the cyl...
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JPH069105Y2 |
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JPH0666076A |
PURPOSE: To efficiently drill at an arbitrary position in an arbitrary direction when downward drilling is made in a narrow working field or the like. CONSTITUTION: A first tilting plate 10 is provided to a front end member 709 of an arm...
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JPH063907Y2 |
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JPH061035B2 |
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JPH0588345B2 |
An improved pneumatic impact imparting tool includes a follower which is slidably accommodated in a recess formed on the inner end part of a rotor in a pneumatic motor. The follower is formed with a projection for allowing a ball to come...
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JPH0588344B2 |
A method for optimizing percussive drilling, especially rock drilling, in which method the operation of the drilling device is adjusted for a desired drilling result to be obtained. According to the invention, a stress wave created in a ...
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JPH05337845A |
PURPOSE: To regulate the rear end position of a piston stroke so as to suppress the occurrence of a failure by allowing a cushion chamber to be partitioned between the rear end face of a piston trying to continue its retreat by inertia a...
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JPH0546863Y2 |
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JPH0583715B2 |
An improved pneumatic impact imparting tool includes a follower which is slidably accommodated in a recess formed on the inner end part of a rotor in a pneumatic motor. The follower is formed with a projection for moving a ball around a ...
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JPH05305576A |
PURPOSE: To provide a tool and a tool holder capable of substantially avoiding the cross section from being made fragile even if a shank is provided with entrainment grooves and a locking groove. CONSTITUTION: A tool shank has at least t...
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JPH05253863A |
PURPOSE: To provide a drill/chisel tool and a chuck capable of reducing the wear of the chuck and a tool shank in a portable tool device such as a hammer drill device, and expanding the working range of the tool device. CONSTITUTION: A t...
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JPH0565437B2 |
The invention relates to a control system with which the rope (3), drawn off from a cable drum (4) by a ramming weight (5), can be braked essentially without shocks within a predetermined overrun travel while avoiding a slack rope format...
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JPH0558118B2 |
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