US1119198A - Pneumatic rock-drilll. - Google Patents

Description

C. J. SMITH. PNEUMATIG ROOK DRILL. APPLIoATIoN FILED MAY 29, 1913. 1 1 l 9, 1 98.

Patented Dec. 1, 1914.

' STATES PATENT OFFICE# v CLAK siai'rH, or or'iiuMwA, IOWA.

` rnnnnarrc nook-DRILL.

specification f Letters Patent. Patented Dec. 1, 1914. original application inea april 7, 1913, serial No. 759,538. Divided and this application filed nay 29, 1913.

Serial No. `770,586.

To allwhomc't may concern: n n n Be it known that I, CLARKJ. SM1TH',.re sidingl at Ottumwa,in` thecounty of Wapello and State .of Iowa, 'have 1 invented certain new and useful Improvements in Pneumatic Rock-Drills,

speciiication'.

This invention, which relates .toimprove- :mentsin rock-drills, is `more kespecially in the natureof a pneumatically actuated rotating attachment for Apneumatic drills of the hammer type and more especially adapted for drilling coal rock and any hardminingsubstance. l

`In pneumatic rock drilling machines now ingeneral use, where a vreciprocating hammachine being shown in the accompanying` mer fpiston, by rapidly successive blows, drives the drill bit farther into thesubstance being drilled, constant turning of the drill,

is necessary so that the cutting or pene tratingportions on the end 'of the drill ydo notv strike on `the same indentations, `which usually causes either a combination fand novel arrangement of the parts, yhereinafter fully" described, specifi#A i .cally pointed out in the appended claims and illustrated in in which: i A.

Figure l-is` a longitudinal section, `partly in elevation, of a pneumatic rock `drill-.ham-v Qthe, accornpanyingv drawings,

mer showing my` appliance attached thereto.v Fig. 2 is an enlarged section on line 2-2 on` rying and actuatingblock piston.' Fig. 6 isv a perspective view partly in section of the precipitating air valve.` i i Inthe practicaly application of mypresent invention my improved `attachmentsl areadapted for being mounted upon and combined with a hand'machine in which is included a pneumatically actuated i driving member or hammer, such a general typeof drawings in vwhicha designates the handle that carries the -i Athe position shown'in Fig. 2, valve port 4 casing b, in which is located a pneumatic `ofwhich the following is av poor cutting or drill- `ing or none atall. f v

My invention "primarily seeks to provide certain improvements in rock drills, of the general type stated of asimple and practicalk construction and withthat and other objects- -in view my inventionconsists ofthe peculiar hammer or plunger o of any approved type, the front end of thesaid casing having `the vusual passage for the butt end of they drill e.

Referring now more particularly `to `my improvedattachments, the same includes a main `frame l,\that is attached to and is f mounted on the front end of the casing b and disposed transversely thereof` whereby to bring a forwardly extended apertured hub portion l5 of the said frame in longi#` tudinal alinement with the drill shank pas` sage inthe-casing b. i The framing 1 also includes a cylinder 16, the opposite ends of which are formed with laXial sockets 17e-17 forfreceiving the opposite ends cfa shiftable vvalve 3 `on which is loosely mounted a piston 2, provided with a central annular grooveQO, for receiving the `projecting lug 60 of lthe shiftable or ratchet block 6, presently again referred to.

17a designates a main inlet` for the working fiuid, and the same is located centrally over thejworking cylinderdand it communi'- ,cates with the opposite ends ofthe said cyl# inder through thee iuidV passages '18.

VValve 3, before referred to, is in the nature cfa central shaft for the piston, its op-1" positeends projecting into the sockets at the opposite ends of theworking cylinder and each` of lthe'saidends has an inlet D10-30y that connects, "through the ports or chan.-`

nels y3l with the inlet ports 1 -tain the opposite ends of the cylinder. Valve 3 `at each endy has anvannular Huid passage 33 and 'eachrifof the .passages `Sconnects with a v longitudinal fluid passage,A 311-134, thateX- tends .over nearly tothe otherI end of the valve and the end` of each of the passages 34` terminates in a radial` outlet 35, that opens into the working cylinder or chamber, asis best shown in` Fig. v2 of the drawing, by i reference to which it will be also seen each end of the valve has another annular grooye 36-36 that forms passages for the iuld 1oov `passing from the'l main inlet to `andithrough lthel'ateral fluid passages to the working cyli; direction. v

opens vwhich allowsthe fluid to pass to 'the` rightlhand end of the valve 3, (seeF to force the said valve 3 back tothe position shown in the said Fig. 2, thereby bringingfthe fluid passage from the main inlet into open communication with the `working cylinder at theright handend of the piston Y' and the'other end ofthe cylinder into open communication with theexhaust.

l Both ends of the cylinder and the ,valve are alike and hence after the action just eX plained has taken place 'underithel movementsof the piston. in one direction, a like` actiontakes place at the other end by reason ofthe movement of the piston inthe kother Since the piston and the valve travel the v sameiway, it is evident that should there be anyl friction on the piston or the valve, it will assistinholding the valve open to its .'fwork.k ,v -V l 4 p i vForturning the drill, I prefer to use the ratchet mechanism shown and the same includes a ratchet sleeve or bushing 8 thatv turns in the hub ofthe main framing and` in kwhich the drill shank is slidably held.

Theratchet block 6 before referred to is `reciprocably Yheld in a socket 61 in the framingand it carries` a drop-pawl l0 that-en- `gages'the ratchet' at one side, a second pawl of. the lever.9is projected in the path of movement of the ratchet block 6 and isso n disposed that as' the said block is carried forwardly with the'pist'on 2 (seevarrow the .said block engages the lever 9 and thereby throws the pawl 12 to turn the' ratchet with the drill in the directionindiycated by the arrow 'i it'being obvious vfrom the drawing that as' thelblock 6`is moved in the other direction its pawl 10 engages and moves thefratchet 8 in the same directioinj the reciprocable movement of the "block 6' underlthe reciprocating actions of the piston imparts a continuous rotary travel to the drill. v f l .To providefor a simple and expedient assembling of the valve and*` thepiston, one

end of the piston cylinder casing is plugged,y as at 40, and the plug'held by a cross pin 41."

In this application, I make no claim to the construction of the and the-connections between v'the 'reciprocating `piston' 2 and the drill e as that forms the subject matter oi' my originalapplication l'ed April 7,

1913#759,538, of which original application thepres'ent oneis adivisional part.

From the. 'foregoing takenin .connection :with the drawings, the complete' construction, the manner of operati o'n..and` the advantages of my invention will be readily understood by those skilled in the" art to which'it appertains. p

`VWhatI claimiis :V 1. ,Al fluid operated -jenginexincluding a casing having va chamber, said casing having counterbores communicatingat one end with said chamber, 'a reciprocating piston mounted: in said chamber, a valve 'member projecting through an4 aperture in. said` piston and vprojecting linto said counterbores 'of said casing, and means for shifting. said valve member bythe fluid that operates said piston.v f j f f Y 2. A fluid operated engine including a casing having a chamber', said casing y rhaving' counterbores communicating at one .end with said chamber, areciprocatingpistonmounted in` said chamber, a valvemember projecting through an aperture insaid piston. and projecting into said counterboresf of said casing, #and means for shifting saidvalve member bythe fluid thatoperates said piston, said last-'named means yincluding fluid passages-in saidcasing, other iluid passages in said valve member cooperating with said piston and withsaidfcasinglpassages toc01i trol the action of said valve'member.

` A pneumatic enginey comprising ay casing havingpa piston chamber, a piston in said chamber, 'saidpistonl having a bore, a

eo Y

ineanscoperative with .said piston,tsaid j.

Valve member, and saidcasing chamber for automatically effecting the shifting otlsaid v valve Vmember ac'cordingto the position of l Copies ofthis patent may be obtained for five cents each, by addressing the Commissioner-vof Patents.

Washington, C.

95 valve member lo'ngiti'idinallyl movable in 1 said piston yborerandjin` saidchamber, rand

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