US3245484A - Pusher leg arrangement for rock drills - Google Patents

Pusher leg arrangement for rock drills Download PDF

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Publication number
US3245484A
US3245484A US153827A US15382761A US3245484A US 3245484 A US3245484 A US 3245484A US 153827 A US153827 A US 153827A US 15382761 A US15382761 A US 15382761A US 3245484 A US3245484 A US 3245484A
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US
United States
Prior art keywords
pusher leg
drilling tool
leg
pusher
tool
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US153827A
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English (en)
Inventor
Ekwall Carl Gosta Bernhard
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Atlas Copco AB
Original Assignee
Atlas Copco AB
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to BE625003D priority Critical patent/BE625003A/xx
Application filed by Atlas Copco AB filed Critical Atlas Copco AB
Priority to US153827A priority patent/US3245484A/en
Priority to GB41789/62A priority patent/GB950564A/en
Priority to DE19621608463D priority patent/DE1608463B1/de
Priority to FI622080A priority patent/FI41002C/fi
Priority to CH1365562A priority patent/CH410829A/de
Application granted granted Critical
Publication of US3245484A publication Critical patent/US3245484A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B19/00—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables
    • E21B19/08—Apparatus for feeding the rods or cables; Apparatus for increasing or decreasing the pressure on the drilling tool; Apparatus for counterbalancing the weight of the rods
    • E21B19/087—Apparatus for feeding the rods or cables; Apparatus for increasing or decreasing the pressure on the drilling tool; Apparatus for counterbalancing the weight of the rods by means of a swinging arm
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q1/00—Members which are comprised in the general build-up of a form of machine, particularly relatively large fixed members
    • B23Q1/25—Movable or adjustable work or tool supports
    • B23Q1/26—Movable or adjustable work or tool supports characterised by constructional features relating to the co-operation of relatively movable members; Means for preventing relative movement of such members
    • B23Q1/28—Means for securing sliding members in any desired position

Definitions

  • This invention relates generallyto ro clc drills and more specifically to a pusherleg-arrangement for rock drills of the pivoted pressure fluid operated expansible pusher leg type, having improved-means for pivotally attaching the drilling tool to the pusher leg. 4
  • One object of the invention is togprovide a pusher leg arrangement for rock drills which for improved transportation and servicing conditions-is readily and freely separable at the pivotal connection between the pusher leg and the drilling tool.
  • Another object of the invention is to provide a pusher leg arrangementfor rock drills which in connection with such separation may be divided into two fully assembled components without the use of any kind of fastening elements to be separated fror'nsaid components.
  • Another object of the invention is to provide a pusher leg arrangement 'for rock drills which as soon as the pusher leg and the drilling tool are pivotally' a'ssembled automatically receives a predetermined resistance to relative pivotal movement between said drilling tool and said pusher leg about the pivotal connection.
  • Another more specific object of 'the invention is to provide in a pusher leg arrangement for rock drills a bayonet connection co-axial with the transverse hin e connection between the pusher leg and the drilling 'tool which permits free separation of said drilling tool and pusher leg in a certain tilt position while efliciently keeping the hinge connection assembled and under a predetermined resistance to relative ivotal movement in other tilt i osidens between said drilling tool and said pusher l'e'g.
  • a still further object of the invention is to provide a pusher leg arrangement for rock drills in which enreient pressure fluid conducting means are arranged inthe' hingeconne'ction between the drillin tool and the pusher leg for conducting pressure fluid therebetvv'e'e'n.
  • FIG. '1 shows a diagrammatic side view of a pusher leg arrangement fora rock drill accordingto the invention.
  • FIG. 2 is an enlarged sectional view on line 22 i n FIG. 1.
  • FIG. 3 is a fragmentary side view of the drilling tool substantially on line in FIG. 2
  • FIG. 4 is a sectional view on line 4:4;in'FIG. 3.
  • FIG. 5 is a fragmentary side view of the upper extremitysof the pusher leg intended for cooperation with the portion of the drilling tool shown in FIG. 3, and
  • FIG. 6 is a side view corresponding to FIG. 1 but showing thepusher leg arrangement resting on the ground and ready for free separation of the pusher leg from the drilling tool or for being swung upward into assembled hinged interconnectron.
  • the pusher leg arrangement for rock drills illustrated in the drawings consists of a pressure fluid operated drilling tool 11 preferably a hammer drill, which by'nieans of 'a transverse hinge connection 11 is tiltably mounted on the upper extremity of a conventional pressure fluidoperated pusher leg 12.
  • the pusher leg 12 maybe of any suitable type and is in FIG. l illustrated diagrammatically as 3,245,484 Patented Apr. 12; 1966 having a cylinder housing 13 in which a piston 14 defines lower and upper working chambers 15; 16, respectively.
  • the piston 14 is provided with a pistonrod 17 protrud ing out of the cylinder housing 13 and carrying at its free end a foot piece 18 intended to rest on the ground.
  • the drilling tool 10 which is provided at its rear with a grasping handle 19 for the directing and guiding of the pusher leg arrangement during work. and carries a drill steel 20, is preferably also equipped with eontrotme ns for controlling the new of pressure fluid to and from the pusher leg 12. To'this end there may be provided on the drilling tool itl 'as diagrammatically indicated in FIG. 1,
  • a reduction valve 21 operable by a handle 22 and a slide fluid supply line 25.
  • a communication 26 from the throttle valve '24 via the reduction valve 21, the slide valve '23 and the hin e connection 11 to the upper working chamber 16, which cham ber by manipulation of the handle 22 of the reduction valve 2-1 may be supplied with fluid at a pressure reduced at will in order to provide for efficient feeding of the drilling tool forwardly by extension of the pusher leg 12.
  • the pressure fluid supply to the pusher leg preferably may be reversihly arranged by means of the slide valve 23, which in another position; not shown, vents the upper working chamber 16'via the communication 26 and connects a direct passage 28- from the throttle valve to the communication- 27, i.e. to 'the lower working chamber 15 or the pusher leg for'contracting-the leg.
  • a releasable hinge connection 11 between-the two components in question To this end the upper extremity of;- the pusher leg 12 carries an arm 30 extending at one side thereof upwardly from the cylinder housing 13 at an acute angle.
  • a transverse pivot providing element or trunnion 31 is firmly conneoted at one end to the arm 30 by means of a tapered connection 32 firmly secured axially by means of a tape'red lock nut 33 bearing against the arm 30 and in threaded engagement with an end ortion 34 of the trunnion 31.
  • the tapered connection 32 may be secured against rotation by means of an axial pin 29.
  • the trunnion 31 Adjacent to the tapered connection 32 an annular shoulder or abut- 'ment 35 is provided on the arm 30.
  • the trunnion 31 has a cylindrical intermediate ortion 36 extending between the abut'nrent35 anda flange 37 on the trunnion. Outwardly of the flange 37 the trunnion 31 is formed with a co-axial reduced cylindrical portion 38 carrying at its free 'en'd radial opposed abutments 39.
  • a tapered pivot provid ng element or bushing 40 Slidably and pivotally arranged on the cylindrical intermediate portion 36 of the trunnion 31 is a tapered pivot provid ng element or bushing 40, having its tapered .portion covered by a rubber lining 41 suitably appliedthereto, for example by vulcahizing. Between the bushing 40 an'd the abutment 35 there is placed an elastically compressible rubber ring 42 around the trunnion '31. A washer 43 is provided on the trunnion 31 in line with the rubber ring 42 for frictional contact with the abutment 35.
  • the tapered bushing 40 is prevented from sliding oil axially from the-cylindrical portion 36-bythe'fiange 37 whenthe rubber ring 42 is in its expanded state.
  • the drilling tool is provided at an intermediate portion thereof with a transverse boss 45 and a tapered transversely extending hole 46 therein is intended for cooperation with the correspondingly tapered rubber covered portion 41 of the bushing 40 on the trunnion 31 of the pusher leg 12.
  • a co-axial continuation of the hole 46 there is provided a bore 47 at one end of the boss 45 and firmly fitted into said bore is a locking member 48 retained against rotation with respect to the bore 47 by means of a locking pin 49.
  • the locking member 48 is provided with an axial key opening 50 intended for insertion of the reduced cylindrical portion 38 together with its opposed abutments 39 in a certain angular position of said abutments. As shown in FIG.
  • the locking member 48 is formed with a diametrically extending V-shaped recess'51 forming diametrically opposed axial cam surfaces 52, 53 on the' locking member 48;
  • the depth of the V-shaped recess is preferably such that the abutments 39, when inserted into the key opening 50, will be about level with the cam surfaces 52, 53 when axial contact is established between the bushing 40 and the corresponding tapered hole 46 in the boss 45.
  • the drilling tool 10 with the drill steel removed is grasped by the handle 19 and kept in an inclined upstanding position on the ground as illustrated in FIG. 6.
  • the trunnion 31 of the pusher leg 12 to be hingedly connected with the drilling tool 10 is pushed into the tapered hole 46 of the boss 45 of the drilling tool until the tapered surface of the bushing 40 contacts said hole, in which position the abutments 39 extend into the key opening 50 and are level with the cam surfaces 52, '53.
  • the axial movement of the bushing 40 causes acompression of the compressible elastic rubber ring 42, which urges the aligned friction washer 43 into frictional contact with the abutment 35.
  • the friction washer 43 receives a predetermined invariable compression dependent upon the added width of the locking member 48 of the boss and the bushing 40 as compared to the distance between the washer 43 and the abutments 39.
  • the rubber lining 41 and ring 42 prevent in compressed state relative movement and wear between the washer 43, the bushing 40, and the boss 45.
  • Tilting of the drilling tool on the trunnion 31 during work of the pusher leg arrangement thus results in free relative motion of the bushing 40 and the locking member 48 with respect to the trunnion 31 and relative motion against a predetermined invariable resistance between the friction ring 43 and the adjacent abutment 35.
  • the drilling tool 10 is again tilted to the extreme forward-downward position on the pusher leg 13, in which position the abutments 39 will be aligned leg 12, in which position the abutments 39 will be aligned with the key opening of the locking member 48 so that free separation in axial direction along the rubber lining 41 and the abutting tapered hole 46 may be performed.
  • the forward-downward position is never applied during normal use of the pusher leg arrangement.
  • longitudinal passages 26a, 27a, FIG. 2 are provided in the drilling tool 10 between the tapered hole 46 and the slide valve 23, followed by opposed peripheral grooves and radial perforations 26b, 27b in the bushing 40, longitudinal passages 26c, 27c through; the trunnion 31, and passages 26d, 27d in the pusher leg; 12 leading to the respective working chambers 15, 16.
  • the rubber lining 41 serves as a seal for the grooves 26b, 27b at the tapered surface of the bushing 40 while O-rings 54 tightening against the cylindrical portion 36 of the trunnion 31 are provided inside of the bushing 40.
  • Pusher leg arrangement for rock drills comprising a drilling tool, a pressure fluid operated expansible pusher leg for supporting and feeding said drilling tool, a pair of cooperating pivot-providing elements supported on parts of said tool and said leg providing a transverse hinge connection between said pusher leg and said drilling tool to permit tilting of said tool and said pusher leg in a plane into different angular tilt positions with respect to each other, a friction member co-axially disposed between said pivot providing elements for creating, when placed under compression, a resistance to relative pivotal movement about said hinge connection, and bayonet-lock means co-axial with said pivot-providing elements for permitting free axial separation thereof in one of said tilt positions and for placing when interconnected said friction member under a predetermined invariable compression between said pivot-providing elements in other tilt positions of said drilling tool and said pusher leg.
  • Pusher leg arrangement for rock drills comprising a drilling tool, a pressure fluid operated expansible pusher leg for supporting and feeding said drilling tool, first and second pivot-providing elements supported on parts of said tool and said leg, respectively, providing a transverse hinge connection between said pusher leg and said drilling tool to permit tilting of said tool and said pusher leg in a plane into different angular tilt positions with respect to each other, opposed abutment means fixedly associated with said first pivot providing element to define therebetween an invariable distance, a friction member, elastically compressible means in line with said friction member, and said second pivot providing element, said friction member and said elastically compressible means being interposed between and supported against said abutment means with said compressible means compressed for creating a predetermined invariable resistance to relative pivotal movement about said hinge connection in said different angular tilt positions of said drilling tool and said pusher leg.
  • Pusher leg arrangement for rock drills comprising a drilling tool, a pressure fluid operated expansible pusher leg for supporting and feeding said drilling tool, first and second pivot-providing elements supported on parts of said tool and said leg, respectively, providing a transverse hinge connection between said pusher leg and said drilling tool to permit tilting of said tool and said pusher leg in a plane into dilferent angular tilt positions with respect to each other, opposed abutment means fixedly disposed upon said first pivot providing element at each end thereof to define therebetween an invariable distance, a friction member and elastically compressible means in line with said friction member, said second pivot providing element, said friction member and said elastically compressible means being disposed upon said first pivot providing element and interposed between and supported against said abutment means for compressing said compressible means upon assembly for creating a predetermined invariable resistance to relative pivotal movement about said hinge connection in said different angular tilt positions of said drilling tool and said pusher leg, and cam means disposed at one end of said first pivot providing element and adjacent to one of said
  • Pusher leg arrangement for rock drills comprising a drilling tool, a pressure fluid operated expansible pusher leg for supporting and feeding said drilling tool, a pair of cooperating pivot-providing elements supported on parts of said tool and said leg providing a single transverse hinge between said pusher leg and said drilling tool to permit tilting of said tool and said pusher leg in a plane into different angular tilt positions with respect to each other between an extreme backward tilt position and an extreme forward tilt position of said drilling tool, and a pair of cooperating bayonet-lock means co-axial with said pivot-providing elements and with one non-rotatably affixed to said rock and the other non-rotatably aflixed to said pusher leg permitting free separation of said drilling tool from said pusher leg in said extreme forward tilt position into only two parts.
  • Pusher leg arrangement for rock drills comprising a drilling tool, a pressure fluid operated expansible pusher leg for supporting and feeding said drilling tool, pivotproviding elements supported on parts of said tool and said leg providing a transverse hinge connection between said pusher leg and said drilling tool to permit tilting of said tool and said pusher leg in a plane into different angular tilt positions between an extreme backward tilt position and an extreme forward tilt position of said drilling tool, a compressible friction member disposed upon said transverse hinge connection between said pivot providing elements for creating, when placed under compression, a resistance to relative pivotal movement about said hinge connection, bayonet lock means disposed on said transverse hinge connection and co-axial with but spaced from said pivot providing elements for permitting free separation of the drilling tool from said pusher leg in said extreme forward tilt position and for engaging said friction member and keeping it under a predetermined invariable compression in other tilt positions of said drilling tool and said pusher leg, and cam means on said hinge connection for engaging said bayonet-lock means for placing said friction member under said compression during transition from said extreme forward tilt position to
  • pusher leg apparatus of the character described for supporting and feeding rock drills and having a drilling tool and a pressure fluid operated expansible pusher leg and a hinge connection transverse to said tool and connecting said pusher leg thereto permitting tilting of said tool and said pusher leg into different angular positions with respect to each other
  • the combination which comprises a pair of cooperating bayonet lock members on said A 6 hinge connection, one being fixedly connected to' said drilling tool on one part of said transverse hinge connection and the other fixedly connected to said pusher leg on the other part of said transverse hinge connection for permitting free separation of said drilling tool from said pusher leg at only one of said tilt positions, and means in said transverse hinge connection for creating a predetermined constant resistance to relative pivotal movement about said hinge connection upon interconnection of said lock means.
  • said tilt position for free separation of said pusher leg from said tool is the extreme forward tilt position of said drilling tool on said pusher ieg with said drilling tool at an acute angle to said pusher leg, whereby the part of said bayonet lock member on said pusher leg becomes positioned with respect to the part on said drilling tool for free separation of the two parts.
  • the combination which comprises a boss disposed on said drilling tool, a trunnion disposed on said supporting and feeding member extending transversely of said feeding member and said drilling tool and adapted to be pivotally connected to and axially removable from said boss, a bushing rotatably disposed around said trunnion for interfitting mating engagement with said boss and coaxially therein, and a pair of cooperating bayonet lock members, one being rigidly connected to said trunnion and the other to said boss coaxially with said trunnion for holding said boss and said bushing around said trunnion in cooperating non-rotatable coaxial relationship in different angular positions of said trunnion with respect to said boss and said bushing therein and for permitting free axial separation of said trunnion and said bushing from
  • Apparatus as recited in claim 9 which also includes elastically axially compressible means disposed around said trunnion axially between said bushing and said feed ing member for compression upon interconnection of r I said bayonet lock members for creating by said compression a thrust on said bushing and said bayonet lock member for holding said bushing in said boss.
  • the combination which comprises a hinge connection transverse to said tool and disposed between said tool and said leg and including a trunnion and a bushing rotatably journaled on said trunnion to permit tilting of said tool and said leg into different angular tilt positions in a plane with respect to each other, pressure fluid conducting means to conduct fluid from said tool to said leg including passages in said trunnion and said bushing, a compressible friction member disposed axially between said bushing and said trunion, a pair of cooperating bayonet lock members coaxial with said bush-ing and said trunnion and nonrotatably associated therewith for permitting free separation of said tool and said leg along said connection in one of said tilt positions but for keeping said friction member under a predetermined axial compression when interconnected in others of said tilt positions creating a resistance to relative pivotal movement.
  • a hinge connection transverse to said tool and disposed between said tool and said leg and including a trunnion and a bushing rotat
  • said boss and said trunnion in cooperating relationshipv but permitting free separation thereof in one of saidtiltpositions
  • said pair of bayonet lock members being separate from but coaxial with said cooperating surfaces of said pivot elements and said separable portions of said hinge connection, and means on said transverse hinge connection responsive to interconnection of said cooperating bayonet lock members for maintaining said cooperating surfaces of said pivot elements in a relationship of predetermined, constant resistance to relative pivotal movement about said. hinge connection during all said different. angularpositions of tilt except said one permitting separation of said separable portions.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Earth Drilling (AREA)
  • Drilling And Exploitation, And Mining Machines And Methods (AREA)
US153827A 1961-11-21 1961-11-21 Pusher leg arrangement for rock drills Expired - Lifetime US3245484A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
BE625003D BE625003A (US06534493-20030318-C00166.png) 1961-11-21
US153827A US3245484A (en) 1961-11-21 1961-11-21 Pusher leg arrangement for rock drills
GB41789/62A GB950564A (en) 1961-11-21 1962-11-05 Improvements in pusher leg arrangement for rock drills
DE19621608463D DE1608463B1 (de) 1961-11-21 1962-11-16 Aus einer leicht loesbaren Verriegelung und einem Kippgelenk mit waagerechter Achse und federbelasteter Bremsvorrichtung bestehende Verbindung zwischen einer Gesteinsbohrmaschine und einer Pendelbohrstuetze
FI622080A FI41002C (fi) 1961-11-21 1962-11-20 Tuella olevan porakoneen irroitettava kiinnitys
CH1365562A CH410829A (de) 1961-11-21 1962-11-21 Anschlusseinrichtung zur trennbaren Verbindung einer Bohrmaschine mit einem Auflager

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US153827A US3245484A (en) 1961-11-21 1961-11-21 Pusher leg arrangement for rock drills

Publications (1)

Publication Number Publication Date
US3245484A true US3245484A (en) 1966-04-12

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ID=22548906

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US153827A Expired - Lifetime US3245484A (en) 1961-11-21 1961-11-21 Pusher leg arrangement for rock drills

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US (1) US3245484A (US06534493-20030318-C00166.png)
BE (1) BE625003A (US06534493-20030318-C00166.png)
CH (1) CH410829A (US06534493-20030318-C00166.png)
DE (1) DE1608463B1 (US06534493-20030318-C00166.png)
FI (1) FI41002C (US06534493-20030318-C00166.png)
GB (1) GB950564A (US06534493-20030318-C00166.png)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6112829A (en) * 1998-04-17 2000-09-05 Hunt; Clive Wilfred Rock drill air leg control system
WO2019000033A1 (en) 2017-06-26 2019-01-03 UGT Group Pty Ltd TRÉPAN AND VALVE ASSEMBLY
CN116905963A (zh) * 2023-07-25 2023-10-20 苏州市本宁建设工程有限公司 一种建筑地基冻土钻孔装置及其使用方法

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102463471B (zh) * 2010-11-09 2015-11-18 深圳市远望工业自动化设备有限公司 一种可旋转加工装置

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US221285A (en) * 1879-11-04 Improvement in taps for tin cans
GB190223883A (en) * 1902-11-01 1903-08-27 Harry Lucas Improvements relating to Plug Taps or Cocks.
US2265267A (en) * 1939-03-08 1941-12-09 Cowles And Rudolph W Lotz Separable swivel connection for conduits
US2525879A (en) * 1948-09-21 1950-10-17 Jr Ned B Farish Quick-detachable fluid line connector
US2908482A (en) * 1952-07-16 1959-10-13 Joy Mfg Co Rock drill
US2929611A (en) * 1955-01-25 1960-03-22 John albert read
US3064741A (en) * 1952-12-10 1962-11-20 Ingersoll Rand Co Feed controlling device for rock drilling mechanisms
US3065806A (en) * 1952-07-16 1962-11-27 Joy Mfg Co Rock drills
US3085638A (en) * 1953-10-23 1963-04-16 Atlas Copco Ab Rock drilling mechanisms

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2289465A (en) * 1940-04-26 1942-07-14 Ingersoll Rand Co Drilling mechanism
US2610030A (en) * 1949-10-29 1952-09-09 Independent Pneumatic Tool Co Drill cradle

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US221285A (en) * 1879-11-04 Improvement in taps for tin cans
GB190223883A (en) * 1902-11-01 1903-08-27 Harry Lucas Improvements relating to Plug Taps or Cocks.
US2265267A (en) * 1939-03-08 1941-12-09 Cowles And Rudolph W Lotz Separable swivel connection for conduits
US2525879A (en) * 1948-09-21 1950-10-17 Jr Ned B Farish Quick-detachable fluid line connector
US2908482A (en) * 1952-07-16 1959-10-13 Joy Mfg Co Rock drill
US3065806A (en) * 1952-07-16 1962-11-27 Joy Mfg Co Rock drills
US3064741A (en) * 1952-12-10 1962-11-20 Ingersoll Rand Co Feed controlling device for rock drilling mechanisms
US3085638A (en) * 1953-10-23 1963-04-16 Atlas Copco Ab Rock drilling mechanisms
US2929611A (en) * 1955-01-25 1960-03-22 John albert read

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6112829A (en) * 1998-04-17 2000-09-05 Hunt; Clive Wilfred Rock drill air leg control system
WO2019000033A1 (en) 2017-06-26 2019-01-03 UGT Group Pty Ltd TRÉPAN AND VALVE ASSEMBLY
EP3645825A4 (en) * 2017-06-26 2021-04-07 UGT Group PTY Ltd DRILLING ARRANGEMENT AND VALVE
US11619096B2 (en) 2017-06-26 2023-04-04 UGT Group Pty Ltd Drill assembly and valve
CN116905963A (zh) * 2023-07-25 2023-10-20 苏州市本宁建设工程有限公司 一种建筑地基冻土钻孔装置及其使用方法
CN116905963B (zh) * 2023-07-25 2024-02-09 苏州市本宁建设工程有限公司 一种建筑地基冻土钻孔装置及其使用方法

Also Published As

Publication number Publication date
FI41002B (US06534493-20030318-C00166.png) 1969-04-30
GB950564A (en) 1964-02-26
DE1608463B1 (de) 1969-09-11
BE625003A (US06534493-20030318-C00166.png)
CH410829A (de) 1966-04-15
FI41002C (fi) 1969-08-11

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