Letters Patent is: 1. In a drillin- apparatus, -the combination comprising 30 a support havin.- parallel vertical bores providing a vertical slideway, a frame havin.- parallel pins receivable in said bores, said pins Teadily removable upwardly fr<)m said support, a motor carried by said frame, said frame havin- an abutment surface which rests on said support 35 when said pins are received in said bores, means driven by said motor for rotatin-. a drilling implement, and feedin@ means for said drilling implement including feedin.- liements extendin- downwardly a substan-tial distance 40 below said frame in parallelism with said slideway. 2. In a drillin,@ apparatus, the combination comprising an adjustable support, a frame mounted on said support, a motor carried by said f@rame, means driven by said motor for rotatin.@ a drillin.- implement, and feedin.- means for said drillin.- iinplement for feeding the la@tter 45 axially relative, to said f-rame cornprising feedin.- elements extendina vertically downwardly a substantial distance below said frame, and a tubular support secured to said said tubular suppoi-t provided with a bottom floor en,-a.-in-. abdtment for steadying the drillin.-,to,ol duiing the drillin- operation. 3. A drilling apparatus as set forth in claim 2 wherein said motor -and said feeding means are fluid operated, and a power source and manually operable control valve 55 means,are provided whereby fluid under pressure may be stipplied to said mc)tor and said feeding means and may be manually re.-ulated, said control valve means carried by said ad,;ustable support and having operator con- (io trollable regulatin.- means. 4. in a drilling lapparatus, the combination comprising a support providiiig a vertical slideway and havin.- an ur,,wardly facin.- sul-face, and a Ln;tary drilling tool compris,'.n,- a frame having a downward projection received in said slideway and readily removable upwardly from (;5 said suppart up(>n removal of the tool, said frame havin.a a downwatdly facin.- surface resting on said supportsurface during the drillin.- operation, said -tool comprisin.- a motor carried by said frame, means driv,-n by said motor for rotating a drilling :Implement and feeding 70 mep,ns for tlit-, driltin.- implement for feedin.- the latter axially relative :to said support and said frame durina drilling includin.- feeding elements extendin.- downwardly a substantial distance below said frame in parallelism wit'a said slideway, said tool having its major portion 75 disposed below said support@surface during verti . cal I overhead drilling. 5. In a drilling apparatus, the combination comprising a base, a horizontal turntable carried by said base, a boom pivotally mounted oii said turntable to swing in vertical planes with respect thereto, a support mounted at the outer extremity of said boom for rotation about the longitudinal axis of said boom, an elongated arm pivotally motinted on said support to swing in planes parallel to a plane which includes the longitudinal axis of said boom, said arm projecting forwardly a substantial distance in advance of said rotatable support, and a unitary drilling tool detachably carried by the outer portion of said arm with its longitudinal axis disposed at right angles to the longitudinal axis of said arm, said drilling tool comprising a drilling implement, a motor for rotating the implement and feeding means for feeding the drilling implement relative to said arm and said boom while the latter remain stationary, said tool being removable as a unit from said arm, said support being rotatable relative to said boom to locate said arm in different lateral tilted positions thereby to vary the angular position of said tool. 6. A drilling apparatus as set forth in claim 5 wherein a second support is mounted on said rotatable support to turn relative thereto about an axis at right angles to said support axis, and said elongated drill carrying arm is pivotally mounted to swing as aforesaid on said second support, said second support being swingable about its pivot relative to said rotatable support to tilt said arm together with said tool in longitudinal planes. 7. In a drilling apparatus, the combination comprising a base, a horizontal turntable on said base, a boom pivotally motinted on said turntable to swing in a vertical direction relative thereto, a support mounted at the outer end of said boom to rotate about the longitudinal axis of said boom, a support carried by said rotatable support to turn about an axis at right angles to the axis of support rotation, an arin pivotally mounted on said second support to swing about an axis at right angles to the axis of said second support, and a unitary drilling tool detachably carried by said arm and arranged at right angles to the longitudinal axis of said arm, said tool removable as a unit from said arm and embodying a motor, a drilling implement driven by said motor and feeding means for the drilling implement for feeding the latter relative to said boom and arm irrespective of the adjusted positions thereof, said rotatable support and said second support being adjustable about their respective axes to tilt said 8. In a drilling apparatus, the combination comprising an adjustable supporting structure including a boom swin-able iii horizontal and vertical directions, a support mounted at the outer end of said boom to rotate about the longitudinal axis of said booni, a second support swivelled on said first support to turn about an axis at right angles to the axis of support rotation, an arm pivotally mounted on said second support to rock relative thereto about an axis at ri.-ht angles to said axis of said second support, a frame carried by said arm at its otiter end and having a lateral projection, and a unitary drilling tool detachably mounted on said lateral projection with its axis arranged at right angles to the longitudinal axis of said arm for drilling holes in the roof, said tool removable as a unit from said frame-projection and embodying a motor, a drilling implement driven by said motor and feeding means for the drilling implement for feeding the latter relative to said boom and arm in any adjusted positions thereof, said supports adjustable about their respective axes to tilt said arm and frame to vary the angular positions of the tool. 9. In a drilling apparatus, the combination comprising a support providing a vertical slideway and having an upwardly facing plane surface, and a unitary drilling tool detachably motinted on said support and comprising a frame and in which said feeding elements are housed, r)o arm to vary the angular positions of said tool.

2,766,012@ 8 fraine having a projection received in said slideway, said 583,806 Kelly et al - --- ---------- June 1, 1897 tool-frame havin.- a downwardly facing plane surface 604,480 Rhodes ---------------- May 24, 1898 resting on said support-surface when said tool is in 676,987 Langbein -------------- June 25, 1901 drillin- position, whereby said tool may rest on said sup1,154,035 Locke ----------------- Sept. 21, 1915 port during its operation and may be readily bodily lift5 1,335,154 Bradley --------------- Mar. 30, 1920 ed vertically from said support, said tool having a motor 1,572,067 Booker ----------------- Feb. 9, 1926 carried by said frame, means driven by said motor for 1,750,957 Fowler ---------------- Mar. 18, 1930 rotatin- a drilling implement and feeding means for said 2,088,649 Hart ----------- ------- Aug. 3, 1937 drilling implement for axially feeding the latter relative 2,123,897 Holmes ---------------- July 19, 1938 to said support and said frame including feeding elements 10 2,166,569 Mitchell --------------- July 18, 1939 extending downwardly a substantial distance below said 2,480,661 Manning ------------- Aug. 30, 1949 frame in parallelism with said slideway, said tool having 2,491,273 Lehner ---------------- Dec. 13, 1949 its major portion disposed below said supportsurface 2,532,079 Beltz ---------------- Nov. 28, 1950 when supported in drilling position. 2,614,808 Curtis et al - ------------ Oct. 21, 1952 References Cited in the file of this patent FOREIGN PATENTS UNITED STATES PATENTS 333,747 Gennany --------------- Mar. 4, 1921 549,849 Downs ---------------- Nov. 12, 1895

2 9 7 6 6 2 0 1 2 United States Patent Office k @ ' a t e n t e d O c t . 9 , 1 9 5 6 2,766,012 APPARATUS FOR DRILLING M-INE-r@OOF-B-I)LT 5 HOLES Ralph Fletcher Hale, Clareinoit, N. H., assigner to JoyManufacturing Company, Pittsburgh, Pp,., a cori@oration of Peunsylvania AppHeation May 20, 1949, Serial No. 94,369 10 9 Clahm. (Cl. 255-511) Th;@s ir@ve@-i,,ion relotes t,@ Or;llin.- @i,)p:,.rattis anc@, 15 particularly to rotary drills especially desi.-ned for Lise in drillin.- roof-bolt oT pin holes in II-!e roof strata of an underground mine or other stibterranean excavation. In under,-round mines or other s@dbter-ranean excavations @it is usually necessary to support the roof a-ainst 20 roof falls or cave-ins, and it is becorpin.- the custl;;@ary practice to support the roof by cross Lea@-ns held in -place by roof bolts or pins anchored in holes drilled in the rooof strata. Various forms of drills have been devised for drillin.- bolt or pin holes in the r<)of strata and the present 25 inventioli contemplates improvements over known ty,pes of drills in that the @drillin.- tool is constructed and is adjustably stipported in an improved manner enabilin.- drilling in the relatively restr;cted spaces and low head room freqliently encotintered in under,-round workings. 30 The d@-illin.- tool of the present invention is relatively simple in design, extremely compact and light in weight and is adapted for association with the s,,ipporting structure and the power source of a conveiitional drilling tool for drillin- blast holes in the workin.- face, andis mount- 35 ed in a novel manner on the blast hole drilling tool. An obj.-ct of the present invention :Is to provide an improved drilling !apparatus. Ano@h.-r object is to provide an improved drillin.- tool for drilling holes in th-. roof strata of an underground mine or other subterranean 40 excavation. A further object is to provide :an improved drillin- tool for drilling holes in the roof strata of an underground mine or excavation for receivin.- suspension bolts or pins for supporting the cro-3s beams a.-ainst the TOof. A still further object is to provide an impr<)vcd 4.5 adjustable supportin-. structure for such a drilling tool. Another object is to provide an im2roved roof-bolt drillin- tool which is associated in a novel mannex with a drill,in.- tool for drillin.- blast holes in the working face' A further object is to provide -a pair of drilling tools, 50 arran.-ed in ri.-ht angular relation and provided with a common support and la common source of power. Still another object is to provide an im-,)roved hydraulically operated drillin.- tool having novel features of construcjects and advantages of the invention will, however, hereinafter more fully appear. In the ;accompanying drawings th(-re is shown for purposes of illustration one form which the invention may 60 assume in practice. ,In these @drawings: Fig. 1 is a side elevational view of a drilling apparatus in which the improved roofbolt drillin.- tool is embodied. 6r, Fi@- 2 is a -plan view of the -improved drilling tool and a portion of its associated supporting strlicttire. Fig. 3 is!a detail sectional view taken through the swiveled drill mountin.@ at the @outer end of the boom. Fi@-. 4 is an onlar,@ed vertical sectional view taken sub- 70 stantially on line 4-4 of Fig. 2, showing details of the bolt-hole drilling tool per se. Fig. 5 is a horizontal sectional view taken on lint 5-5 of Fig. 4. Fig. 6 -is a horizontal sectional view taken on Ene 6-6 of Fig. 4. Fi,a. 7 is -a diagrammatic view showing the hydraulic system and the associated control valve means. In this illustrative constructio n, as shown in @the drawin.-s, the imp-roved drilling tool for drillin- roof-bolt or pi n holes in the roof strata is generally desi.Inated I aiid is shownassociated with adrilling tool 2 for drilling blast holes in the working face. The :drilling tools are permanently arraiigedin iright 4angular relation and are inounted on an adjustable supporting structure 3 carried by a mobile base 4. The drilling tool 2 for drilling blast holes may be of a type .-enerally similar to that disclosed in !a co@pending application to Ray A. Lehner Serial No. 584,608, filed March 2@4., 1945, now matured into Patent No. 2,491,273, granted December 13, 1949, and comprises a tubular support or arm i5 swiveled at 6 on a:suppott 7. Carried at the front end of the tubular support is a casing 8 which en@-loses speed reducing gearing for connectin,-,a conventional hydraulic motor 9 to a drill spindle 10. This spindle niay be rotated by the motor 9 through the speed reduciiig gearing iconta@ined in the casing !8 and carries a tislial chuck il;l fbr receiving the shank of a conventional au-er idrill steel. The tubular support 5, as described in the above mentioned applicatio,.a, encloses a hydraulic feed motor of the cylinder iand piston type for feeding the dr@ill spindle 10 in a@n axial direction as it is rottted. The improved roofbolt drilling tool I is mounted on the goar casing 8 of the drilling tool 2 at one side of the latter in a novel iianner as later described. The support 7 is swivelled at 15 on a cylindrical portion 16 of @a @rotatable support 17 with its swivel axis disposed at right an-les to the swiv-,l axis 6. The silpport 7 has an annular flange IS which is held in position by a split retaining ring 19 sectired as by srrews to the rotatable support :1@7. Threaded within the rotatable su@p.,z)ort7 is a locking screw 20 having lan operathi.- handle 21 and this screw when tightened is engageable with the cylindrical portion 16 to lock the swivelled support 7 in adjusted position. The rotatable suopor-t 17 is joljxnaled in bearings 22, 22 (Fig. 3) carried by a frame 23 secured to the outer end of an elon-ated boom 2-4 and is rotatable on its bearings about the longitudinal axis of the boom. Carried by the frame 23 is a conventional hydraulic motor 25 havin.a its power sliaft connected throu.-h conventional xeduction gaariiig to a worm shaft '26 (Fiig. 3) which carries a worm 27 meshing with a worm wheel 28 keyed to the rotatable support 17. The swivel support 7 is provided with spaced arms 29 haviiig bores 30 for receiving truniiions 31 inte-ral witl-i ia.collar 32 secured to the tub-,itar support 5. A lrcl:in- screw 34 and this s@rew when tightened is engageable witli,a @plane surface formed on the adjacent side of the collar 32 for securing the tubular si@pport 5 in adjusted position on its swivel. The rearward -portion of the boom 24 is mounted in a frame 36 which is pivoted at 37 on:a horizontal axis to swing in vert@ical planes Tela@tive to a horizontal tumtable 33. This ttirntable is rotatably mounted to turn about an @tkDri.-ht axis on a fraric 39 of the mobile base 4 and may be provided with power operated rota-ting means. Hydraulic jacks 40 ai7e arranged between the turntable and the swingable frame 36 for swin.-ing the booni -24 i-n vertical plaiies about its pivot. The tubular stipport 5 carries a valve device 42 for,controllina th-. flow of liquid under presslre to th@- feeding motor for the drill spindle 10 of the drilling tool 2. Since the strtictu!re above described is generally like that of the tion and -novel mounting means. These and other @ob- r,.5 is th-readed within an opening in one of the side arms 29 ot the swivelled frame 7 and has an operating handle 35

3 aoplication above referred to detail description and illustration the@reof are hereinunnecessary. The blast hole drilliii.- tool 2 may be adjusted into d-iffcrent elevated and horizontal @positions by swingin- the boom 24 either vert@ically or horizontally on its II)ivot@al mounting and may be swivelled in any desired pfane about -the three swivels described P-t the outer extremity of the boom, so that drillin.- may be effected at any desiied location in the workin- face. I Now referrin.- to the specific structiire of the drillin-@ tool I for drilling the holes @in the roof strata for receiving the roof-b,,)Its or -oins, it will be noted that a frame 44 ,carries verti-cal pins 45 which a-re received in parallel holes 46 in a frame 47 suitably secured to one side of the gear casing @S. The frame 44 has -an abutment surface S which rests on the -top @of the frame 47 when the pins are seated in the holes 46, as shown in Fi.-. 4. The drillin- tool;l is shown in a ver-tical drilli.,i.- position and the frame 44 carries at its outer side a conventional hydraulic motor,43. This motor has a spur gear 49 (Fig. 4) keyed to its power shaft '50 and the -ear @49 meshes with a large sput- -.-ar 51 having its hub 52 joumaled in bearin-s '53, 53 suitably supported within the frame ,44. A vertiral cylinder @54 is arran,-Cd coaxial with the gear '51 land is splined at '55 to the gear hub, and has a lower head '56 -Uided in a verti-cal bore @57 of 'a tubular hotising 58. This housing is @seclired at its upper end within the frame 44 and extends dowriwatdly below the frame in the manner Contained in a bore 59 of the cylinder '54 is a -tationary feed @,piston i6O havinits tubiilar pistoli rod 61 extending downv,,atdly through the cylinder'54 and secured at its lower end at 62 within a cap 63 suitably seicured to the lower end of the tubular housing @58. Threadedly scoured at 64 within the feed p,iston is a tube 65 which extends @axiahy thro-ugh the tljbular piston rod and is sociired at its lower end at 66 to -the cap 63. The cap is formed viith a bottom poin@, 6'7 @vhich may en.-a.-e the mine floo@- when the drillin,@ tool is in its lowered position thereby to steady the tool during the drilling operation. Formed in the cap ar-fluid passa,-Cs 69 atid 70 (Fig. 6), the former communicatin- throu,-h a port 7-1 -,vith the interior of the piston ,rod @l and the latter communicatin.- through a port 72 with a chamber 73 within the cap. The lower end of the tube 65 comm-Linicates with the,chamber 73. A port 74 -in the upper portion of the piston rod connects the i.nterio-r of the latter with the cylinder bore beneath the feed piston 60. The upper end of the tube 65 communica-tes with an axial passa,-e 75 in the piston, :and this axial passage leads to the cylinder bore above the feed piston. SeeiiredintheboTe@ofthefeedcylinder,5,4atthe upper end of @the latter is a -chuck sleeve 76 havin,@ a .ocket 77 for re-,eivinla the shank 78 of @a sectional drill steel 79. Secured to the Lipper end of the drill steel is a conventional d@rill bit '80. The steel shank 78 is of polygonal ishape in cross section and the socket is icorrest)ondin,-Iy shaled so that the ichtick sleeve 76 an@d the drill steeltotate together. Thus when liquid under pressure is supplied to one or the other of the passages 69 and 70, in a manner to be later described, the feed cylinder together w@ith the drill steel may be fed forwatdly or the feed cylinder may be retrazted as desired. The fluid supply for the motor and feed cylinder of the drillin.- tool 1, and the control valve mea-ns therefor, are ftiily disclosed in the above mentioned Lehner application. The hydraulic system shown in Fig. 7 comprises a motor driven liquid pump82 carried by -the base and having its suction side connected by a conduit 83 to a liquid tank 84. The dischar,-e side of the @pump is connected by a -conduit 85 to thepressure passage -of a conventional valve box 86. The dischar,-e passage of the valve box -is connected by a cond.@ait 87 back to the tank. The valve box has parallel bores Nvhich receive conventional slide valves 88 and 89 havin.- usual operatin.- handles. Thi@ 2,766,012 4 bore containing the slide valve 88 is connected by c<)nduits 90 and 91 to the opposite sides of the @rotation motor @48 while the bore containing the slide valve 89 is connected by conduits 92 and 93 to the passages 69 and 70 respectivelyof the feed motor. When fluid under pressure is snpplied to the condiiit 93 it may flow through passage 70 and th.- tube 65 to the front e-nd of the feed cylinder in advance of th-. piston 60, thereby to effect forward feedin- movement of the feed cylinder. When the 10 conduit 93 is connected to exhaust and pressure fluid is applied to the conduit 92 it may flow throu.-h passa,-e 69 -ancl the hollow piston rod 61 to the feed 'CylindeT at the rear side of -the piston 60, thereby to effect retraction of the feed cylinder. Connected in the conduits 90 15 and 93 are conventional au-tomatic volume control valves 94 and 95 respertively connected by cond-aits 96 and 97 to the return conduit87 wh@ich leads back to the tank. These automatic volume control valves limit the maximum volume ivhich can -pass to the xotatlon and feed 20 motors -in a given unit of tiine,,re,@ardless of thepressure conditions, and serve to preclude the delivery of the full output of the pump to either motor so that either motor rnay be protected a-ainst bein- robbed of pressure by the other as the loads on the moto-r-s vary. A 25 drain conduit 98 leads from the -rotation -motor 48 to -the return conduit 87 so that any leaka@ge of liquid may be drained bagk to the tank-. The discharge @5ide of the pum@p 82 is also connected to the control valve device 42 for the feed motor of the drilling tool 2 and to a valve de30 vice -,vhich controls the rotation motor 9 so that a common hydraulic systern for the drillin.- tools 1 and 2 is afforded. The automatic volume control valves may be of a type similar to that fully disclosed in a @patent to Vickers No. 2,272,684, -ranted February 10, 1942. 35 The drilling tool 2 is operative to drill blast holes in the workin- face at any desired location and during the blast hole drilling operation the bolt-hole drilling tool 1 is detached from the blast hole drilling @tool and laid to one side. W-hen it is desired to d.-rill holes in the roof 40 strata for receivin,@ the suspension bolts or pins the auger drill steel is removed from the ch,,ick 11 of the blast hole drillin- tool and the drillin.- tool I is -attached to the dtillin'g tool 2 simply by insertin- the pins 45 in the holes 46 of the supportin.- frame 47. The boom 24 may be 45 adjusted by the hydraulic jacks 40 to locate the drilling tool I at the degired clevatioi and the turntable 38 may be siiitably rotated to swing the boom laterally to locate the drilling tool I in the desired horizontal position. By operatin,@ the motor 25 the support 17 may be rolled 50 about the Ion.-itudin-al axis of the boom to locate the drillin- tool in different inclined positions at either side of the boom. The locking screws 20 and 34 may be released and the tiibular support 5 by which the drilling tool I is c,,iT-ried miy be adjtisted @about @the rectangularlv 55 related swivel a-@es with respect to the rotary support 17 and thereafter the screws may be tightened to clamp the parts in adjusted position. Thus by mounting the bolthole drillin-, tool I on the,tlibtilar support 5 of the blasthole drilling tool 2 a wide ran.-e -of adjustment is provided 60 tbus enabling the bolt--hole drillin.- tool to drill holes in the TOOF strata not only i-Ti a vertical direrhon but also at different angles with Tespect to th.- vertical as desired. T.Tie rotation motor 48 may be operated under the control of the slide valve 83 to eftect rapid r-otation of the cylin65 der 54 togethet wiih the drill steel, and the feed motor may be operated und,-r the control of the slide valve 89 to feed the feed cylinder to-ether with the drill s,teel toward the work as ttie drill steel is rapidly rotatedto effect drillinf_,, and to retract the feed cylinder from the work. 70 Evidently, the drilling tools I and 2 may, under certain condit;ons, be operated concurrently to drill holes simultaneously in the woriing face,and mine roof. As a result of -this itivention an improved drilling apparatus is provided wbereby -holes may be drilled ip the 75 working fam and in the roof stra:ta by means of drwing

5 .toolg permanently arranged in right angular relation and havin- common supporting means and a common source of power. By mounting the roof bo,',t drilling tool on the drihing tool for drilling blast holes a structure relatively simple in design, extremely compact and ligh-t in weight 5 is provided. By utilizing the:adjustable supporting structure for the blast hole dril@hng tool for supporting the bolt hole drilling tool both the blast h<)Ie drilling and the roof-bolt drilling functions are made possible by means of a unitary structure. By detachably mounting the roof 10 bolt drillin.- tool on the blast hole drillin.- tool @the bolt hole drillin.- tool may be readily detac-,ned duting t-he blast hole drillin- operation.. Further by the - provision of the structure disclosed, a drilling tool for drilling bolt or pin holes in the roof strata is provided, which is a 15 simple attachment to a conventional blast hole - drill-ing tool, thus obviatin-. ;the need -of separate pieces of drilling equipment for performin.- the separate functions specified. Other uses and advantages of the invention will be clearly apparent to those skilled in the art. 20 While there is in this application specifically described one form which the invention may assume in - practice, -it will be understood that this form is shown for purposes of illustration only and that the invention may be modified and embodied in various other forms without 25 d--partin,a from its spirit OT the scope of the appended claims. 1',Iihat I claim as new and desire to secure by