US1203284A - Rock-drill. - Google Patents

Description

D. S. WAUGH.

vRock DRILL. APPLICATION FILED FEB. I4. I9I4.

Patented Oct. 31, 1916.

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D. S. WAUGH'.

RocK DRILL.

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D. S. WAUGH.

HCK DRILL.

APPLICATION FILED FEB- 14, 1914. 1,203,284. Patented 061;. 31,1916.

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ROCK DRILL.

APPLICATION FILED FEB. 14, 1914.

Paten'd Oct. 31,1916.

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Patented Oct. 31, 1916.

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Rock pmu. APPLICATION FILED FEB. 14k, 1914.

' UNITED STATES PATENT OFFICE.

DANIEL S. WAUGH, OF DENVER, COLORADO, ASSIGNOR TO THE DENVER ROCK DRILL MANUFACTURING COMPANY, OF DENVER, COLORADO, A CORPORATION OF DELA- WARE.

ROCK-DRILL.

Specication of Letters Patent.

Patented Oct. 31, 1916.

To all rwhom t may concern:

Be it known that I, DANIEL S. WAUGH, a citizen of the United States, residing at Denver, in the county of Denver and State of Colorado, have invented new and useful Improvements in Rock-Drills, of which the following is a specification.

rlhe present invention relates more particularly to that type of rock drills in which the drill is advanced to its work by uid pressure. In this type, it is the usual practice to employ a feed cylinder and a feed pistonoperating therein. One of these is connected to the motor. For certain types of work, it is desirable that the cylinder be connected to the motor and the piston has a rod or spur projecting from the rear end of the feed cylinder. Where, however, it is desirable to secure the feed means to a support, as for example, the arm of a column, then it is necessary that the piston be attached to the motor in order that a clamp can be placed around the cylinder, and said cylinder held stationary. In the embodiment of the invention disclosed, this latter type of feeding means is employed, but various features of the invention may be utilized with other forms of structure.

It is one of the objects of the present invention to employ the above-described specitic arrangement and to provide in connection therewith, conveniently accessible means for controlling both the supply of motive fluid to the feeding means and the arms, and also to control the supply of the cleansing` fluid.

Another and important object is to provide means of a novel and effective character for conveying a cleansing liquid from the rearl end of the machine to the bore or passageway of a drill bit operated on by the motor piston.

In the accompanying drawings Figure 1 is a view in elevation of the drill. Fig. 2 is a longitudinal sectional View therethrough. Fig. 3 is a. longitudinal sectional View on an enlarged scale of the rear portion of the feeding means. lFig. 4 is a longitudinal sectional view on an enlarged scale of the front portion of the feeding means and the rear portion of the motor, illustrating in greater detail the connections between the same. Fig. 5 is a longitudinal sectional .iew onen .enlarged scale of the front por# of Fig. at. Fig. 7 is a cross sectional view on n the line 7 7 of Fig. 3. Fig. 8 is a cross sectional view on the line 8 8 of Fig. 3. Fig. 9 is a cross sectional view on the line 9 9 of Fig. 5. Fig. 10 is a perspective view of the clamping washer for the feed piston. F ig. 11 is a perspective view of the feed piston packing cup. Fig. 12 is an end elevation of the feed piston body. Fig. 13 is a perspective view of a portion of the rear head block of the motor cylinder and more particularly the rearward extension thereof. Fig. 14 is a perspective view with a portion broken away of the motor piston mounting.

Similar reference numerals designate core responding parts in all the figures of the drawings.

In the embodiment disclosed, a motor is employed, which is designated generally by the reference numeral 15, and connected to the rear portion thereof, is the feeding means, designated generally by the reference numeral 16.

The motor' 15, in the structure shown, is

of the valveless type, and comprises a cylin-v der member 17, within which operates a hammer piston having an enlarged front head 1S and a rear smaller head 19, the two being connected by a reduced neck 20. The smaller head 19 reciprocates in a mounting 21 arranged in the rear portion of the cylinder 17 and projects beyond the rear end of said cylinder, being provided with va flange 22 abutted against said rear end. A head block 23, also fitted against the rear end of the cylinder. abuts against the iiange 22, and thus holds the mounting 21 in place. This head block has an internal chamber 24 that receives the rearwardly extending portion of the mounting and said head block furthermore has a tapered rearward extension 25 terminating in a reduced nipple 26.

Located against the front end of the cylinder 17 is a front head 27provided with a forwardly extending chuck sleeve 28, in

which is clamped a bushing 29 having an .v

" tween ,the large piston head 18 and the drill 30, is a tappet 32 having a bore 33 that communicates with the rear end of the bore 31 in the drill bit, and said bore 33 is enlarged to provide an internal chamber 34, within the tappet. Leading to this chamber, are lateral ports 35 that communicate at their outer ends with an annular grooveV 36 formed in the periphery of the tappet, and this groove is supplied with gaseous fluid under pressure through a suitable passageway indicated in dotted lines at 37.

xtending from the. nipple 26 of the head block 23, is a' liquid-conveying tube 38 that passes longitudinally through the motor piston and into the tappet, the front end of this tube terminating within the chamber 34 in rear of the port 33, but in advance'of the ports 35. The tube is held in place by a plug 39 threaded into the nipple 26, and bearing against a packing gasket 40 surrounding the rear end of the tube. This packing gasket is thus compressed against the tube and serves to effectively hold it against forward displacement, besides preventing leakage therearound. Y

It is believed to be unnecessary to enter into a detailed description of the structure and operation of the motor and the liquidcleansing means as thus far described. It is thought sufiicient to state that the motor piston, being reciprocated, `will strike the tappet 32, and the blows thereof will thus be transmitted to the rear end of the drill bit. Liquid delivered to the tube 38 by the meansV hereinafter described, will be projected from the front end of the tube into the port 33, and will find :its way across the jointbetween the tappet 32 and the drill bit 30. The gaseous fluid supplied through the ports 35 will surround the stream of liquid projected from the tube 3S, and thus produce an inclosing column which will effectively prevent any material leakage of the liquid atthe joint between the tappet and the drill bit. Thus the'drill hole will be supplied with both cleansing fluid of a gasecus and liquid nature and the objectionable leakage of liquid within the chuck is obviated.

Referring now to the feeding means 1.6, the same includes a feed cylinder 41 having a front head 42 and a 'rear head 43. These assi- 11Sttherns 549:..

Within the cylinder 41 operates a piston comprising a body 51, against the rear end of which is fitted a leather o-r other packing cup 52 that is, in turn, borne against by la washer 53. The parts are held together by a plug 54 extending through the washer 53 and cup 52 and threaded into the body 51. rlhis plug has a head 55 bearing against the washer 53 and having a groove 56 in which is located an expansible ring 57. The head 55 and ring 57 enter a socket 58 formed in the rear head 43, and the ring 57, frictionally engaging the walls of this socket, serves to normally' hold the piston in the rear end of the cylinder. This piston, comprising the parts .5l- 54, is secured to a piston rod thatis in the form of a tubev 59, the bodj.7 51 of the piston having a forward reduced extension 60 that is threaded into the rear end of the tubular rod 59. The frontend of this tubular rod is flared, as shown at 61 and lits over the tapered rearward extension 25 of the head block23. A clamping ring 62, surrounding this flared end 61 and having a tapered bore to fit the same, serves to secure the piston rod to the headV block 23. The clamping ring 62 is, in turn, held in place by side bolts 63 passing therethrough and through the front head 27 of the motor cylinder. It will thus be evident that the means for securing theV piston rod to the rear head block, also serves to retain the head block in position on the rear end of the motor cylinder 17.

Motivefluid for moving the feed piston ports 69 that afford communication between the chamber 68 and the interior or bore of said coupling tube 44. The rear end ofthe coupling tube is in communication with a passageway 7 0 leading to the socket 58 in the rear head 43, and thus fluid under pressure is admitted to the rear end of the feed cylinder 41 behind the piston 51-54. In order to supply this motive fluid to the motor, the piston body 51, cup 52 and washer 53 are provided with alined ports 71, which permit the fluid to pass from the rear end of the piston intoV they tubular piston rod 59, and' the tapered extension 25 at its juncture with the nipple 26, has 'ports 72 that afford communication between the interior ofthe piston rod 59 and the chamber 24 in the head block 23. From this chamber the motive uidy is. distributed to the meter ,eylinderfertile-purpose- 'Of .operating the piston and is suitably controlled by said piston.

The means for supplying cleansing liquid to the tube 38 is preferably constructed as follows: Threaded into the plug 39, which is carried by the nipple 2G of the extension 25 of the head block 23, is a rearwardly eX- tending tube 73 that has its rear end in the reduced extension 60 of the feed piston body 51. Extending forwardly from the rear head 43 of the feed cylinder, is a smaller tube 74 that passes through the plug 54, and is slidably telescoped in the tube 73. This tube 74 is fixedly held to the rear head 43 by a plug 75 threaded into a rearward extension 7 6 formed on the head 43, the inner end of the plug 7 5 surrounding the rear end of the tube 74 and bearing against a compressible packing 77, which is thereby forced against the tube and effectively holds it in place, as well as prevents leakage. The outer end of the plug 75 is preferably tapered rearwardly, as shown at 78 to provide an abutment spur for the machine. In order to prevent leakage around the tube 7 4, where it passes into the tube 7 3, packing is provided. In the present embodiment, this packing comprises a flanged washer 79 surrounding the tube 74 and having its flange abutted against the end of the tube 73. Another washer 80 bears against the washer 79, and bearing against this washer 80, is a coiled spring 8l. The opposite end of this coiled spring bears against a washer 82 having a rearwardly tapered face that enters the recessed end of the plug 54.

The liquid cleansing agent is supplied to the machine from any suitable source coupled to a nipple 83 formed upon the ring 49 diametrically opposite to the nipple 64, and the bore of this nipple S3 communicates with an internal chamber 84 surrounding the front end of the tubular connecting element 45. Said end has ports 85 affording communication between the chamber 84 and the bore of the tube 45. The rear end of this tube 45 communicates with a passageway 86 that leads to the rear end of the tubev74. In the ordinary practice, a hose line is connected to the nipple 83 andrcontains an ordinary controlling valve (not shown). It will be evident that liquid supplied to the nipple 83, will pass through the tube 45, passageway 86, and thus enter the tube 74 and discharging from this tube, will enter the tube 73, and thereby be delivered into the tube 3S. Thus liquid can be supplied to the drill bit longitudinally through the machine, and irrespective of the relative position of the feeding means members. It will also be evident that inasmuch as the controlling means for both the gaseous motive fluid and the liquid are at the front end of the feed cylinder, they are convenient to the operator, who is engaged in rotating the machine by the medium of a handle 87 suitably mounted on the motor and shown in Fig. l.

From the foregoing, it is thought that the construction, operation and many advantages of the herein described invention will be apparent to those skilled in the art, without further description, and -it will be understood that various changes in the size, shape, proportion and minor details of construction may be resorted to without departing from the spirit or sacrificing any of the advantages of the invention.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is zl. In apparatus of the character set forth, the combination with a motor, of a drill bit operated thereby and having a passageway for cleansing fluid, extensible feeding means connected to the motor for advancing the l same to its work, means for supplying motive fluid to the motor, and means for passing a cleansing fluid separate from the motive fluid through the feeding means and motor to the passageway of the drill bit.

2. In apparatus of the character set forth, the combination with a motor, of a drill bit operated thereby and having a passageway for cleansing fluid, extensible feeding means connected to the motor for advancing the same to its work, and extensible means passing through the feeding means and motor for conducting cleansing fluid to the passageway of the drill bit.

3. In apparatus of the character set forth, the combination with a motor, comprising a cylinder member and a piston operating therein, of a drill bit operated by the pis'ton and having a passageway for cleansing fluid, a tube extending through the piston and delivering to the passageway of the drill bit, extensible feeding means connected to the motor for advancing the same to its work, and extensible means passing through the feeding means for conveying cleansing uid therethrough to the tube.

4. In apparatus of the character set forth, the combination with a motor, comprising a cylinder member and a piston operating therein, of a drill bit operated bythe piston and having a passageway for cleansing Huid, a tube extending through the piston and delivering to the passageway of the drill bit, extensible feeding means connected to the motor for advancing the saine to its work, and slidably telescoped tubes in the feeding means, one being' connected to the first-mentioned tube, the other to the rear portion of the extensible feeding means and having an inlet for cleansing fluid.,

5. In apparatus of the character set forth, the combination with a motor, of a drill bit operated thereby and having a passageway Y for cleansing fluid, feeding means' lfor the motor, comprising a cylinder member and a piston member operating therein, one of said members being connected to the motor, means for supplying motive fluid to the motor, and means for passing a cleansing uid separate from the motive fiuid through the feeding means and motor to the passage'- way of the drill bit.

6. In apparatus of the character' set forth,

the combination with a motor comprising a cylinder member and a piston operating therein, of a drill bit operated by the piston and having a passageway for cleansing fluid, a. tube extending from the rear end of the cylinder member through the piston and delivering to the passageway of the drill bit, extensible feeding means connected to the motor and comprising a cylinder member and a piston member operating therein, one member being connected to the motor, and slidably telescoped tubes in the feeding means, one being connected to the first-mentioned tube, the other to the rear portion of said feeding means and having an inlet for cleansing fluid. Y 7. In apparatus of the character de scribed, the combination with a motor, of a feed piston having a tubular piston rod connected to the motor, a feed cylinder member surrounding the piston, and extensible cleansing fluid conducting means extending through the cylinder member and through the piston.

S. In apparatus of the character set forth, the combination with a motor, comprising a cylinder member and a. piston operating therein, of a drill bit operated on by the piston and having a passageway for cleansing-fluid, a head block at the rear end of the cylinder member, a tube mounted on the head block and extending through the piston for delivering cleansing fluid to the passageway of the drill bit, extensible feeding means connected to the motor and com prising a cylinder member and a piston operating in the cylinder member and having a tubular piston rod connected to the head block, telescoping tubes in the feeding means connected respectively to the head block and to the rear end of the feed cylinder member and means for delivering a cleansing fluid to the rear tube.

9. In apparatus of the character set forth, the combination with a motor comprising a cylinder member and a piston member operating therein, of feeding means for the motor comprising a cylinder member and a piston member operating therein, a head block interposed between the motor and feeding means and connected to one member of each, oppositely extending communicating fluid conducting tubes carried by the head block and disposed longitudinally of the motor and feeding means within 'the same, andfmeans -for delivering fluid to the tube that extendsinto the vfeeding means. l

10. In apparatus of the character set forth, the combination with a motor com.- prising a cylinder member and a piston member operating therein, of feeding means for the motor comprising a cylinder member and a piston member operating therein, a head block interposed between the motor and feeding means and Connected to one member of each, oppositely extending communicating fluid conducting tubes carried by the head block and disposed longitudinally of the motor and feedingmeans, within the same, another tube telescoping the tube that extends into the feeding means, and means for supplying fluid to the telescoping tube.

1l.V In apparatus ofthe character set forth, the combination with a` motor cylin` der having a drill receiving chuck at one end and a head block at the opposite end, of a reciprocatory piston operating in the cylinder, a tube secured to the head block, extending through the piston and delivering to a drill bit placed in the chuck, a feed cylinder, a feed piston operating therein and having a tubular rod secured to the head block, a rearwardly extending tube from said head block located in the tubular piston rod, another tube connected 'to the rear portion of the feed cylinder and telesco-ping with the rearwardly extending tube,

and means for supplying fluid tothe thirdV tube.

l2. In apparatus of the character set forth, the combination with a motor cylinder having a chuck at one end and a head block at the other end of a reciprocatory piston operating in the cylinder, said yhead block having a rearwardly extending pro jection, a tube secured to the head block andV tending tube, and means for supplying fluid to the last-mentioned tube.

13. In apparatus of the character set forth, the combination with a motor andV drill holding means associated therewith, ofV

extensible means for feeding the motor to its work, means extending from the rear end of the feeding means through the same and through the motor for delivering cleansing iuid to the drill bit, and supply means mounted on the front portion of thefeeding means and having communication with the rear of said delivery means.

. 14. apparatus of Athe character set forth, the combination with a motor and drill holding means associated therewith, of extensible means for feeding the motor to its work, means extending from the rear end of the feeding means through the same and through the motor for delivering cleansing fluid to the drill bit, a conduitfextending from the front portion of the feeding means rearwardly and having communication with the rear of said delivery means, and means for supplying cleansing fluid to the front end of the conduit. l

15. In apparatus of the character set forth, the combination with a motor and drill holding means associated therewith, of extensible means for feeding the motor to its work, means extending from the rear end of the feeding means through the same and through the motor for delivering cleansing fluid to the drill bit, a Conduit located exteriorly of the feeding means and longitudinally thereof, said conduit having communication at its rear end with the rear end of said delivery means, and means for supplying cleansing fluid to the front end of the conduit.

16. In apparatus of the character set forth, the combination with a motor and drill holding means associated therewith, of a feed cylinder, ay piston mounted therein and having a rod connected to the motor, extensible means passing through the feeding means and through the motor for delivering cleansing fluid to a drill bit placed in. the drill holding means, a conduit mounted on the cylinder longitudinally thereof, said conduit having communication with the rear end of the extensible means, and means connected to the front end of the feed cylinder for supplying fluid to the conduit.

17. In apparatus of the character setV forth, the combination with a motor, comprising a cylinder having a drill-receiving chuck at one end and a head block at the other end, and a piston operating in the cylinder, of a tube connected to the head block and extending through the piston, a feed cylinder arranged in rear of the head block, a piston in the feed cylinder having a tubular piston rod connected to said head block, a tube extending rearwardly from the head block within the tubular piston rod, a forwardly extending tube extending from the rear end of the feed cylinder and telescoping with the rearwardly extending tube, a conduit carried by the feed cylinder and having communication at its rear end with the forwardly extending tube, and means connected to the front end of the conduit for supplying fluid thereto.

18. In apparatus of the character set forth, the combination with a motor, of extensible feeding means therefor, including a cylinder member and a piston operating therein, heads for the cylinder member, and

a tubular connection between the heads for holding the same together, said connection constituting a conduit for the passage of fluid.

20. In apparatus of the character set forth, the combination with a motor, of an extensible feed cylinder member and a feed piston member operating therein, a connection between one of vthe members and the motor, extensible means passing throughv the feed cylinder and piston and through the motor for. delivering cleansing fluid, yheads for the feed cylinder, a tubular connection between the heads for holding the same together, said connection being external of the cylinder, and said connection having communication with the extensible means, and a fluid supply nipple connected to the fron Y end of the tubular connection.

21. In apparatus of the character set forth, the combination with a motor, of feed-V ing means therefor, including a tubular member connected thereto, means for conveying cleansing fluid through the motor, and telescoping tubes in the tubular member of the feeding means, communicating with said conveying means.

22. In apparatus of the character set forth, the combination with a motor, of feeding means therefor, including telescoping tubular members connected thereto, means for conveying cleansing fluid through the motor, and telescoping tubes in the feeding means communicating with the conveying means and carried respectively by the telescoping members of`the feeding means.

23. In apparatus of the character set forth, the combination with a motor, comprising a cylinder member and a piston op erating therein, of a tube extending through the piston member, a feed piston having a tubular rod mounted on the rear of the cylinder member, a tube Within the rod extending from the piston to the cylinder member, a second cylinder member surrounding the feed piston, and a tube extending from the second cylinder member into the tube that is within the feed piston rod.

24. In apparatus of the character set forth, the combination with a motor, comprising a cylinder member and a piston operating therein, of a tube extending through the piston, a feed piston having a tubular rod mounted on the rear of the cylinder member, a tube within the rod extending from the piston to the cylinder member, a second cylinder member surrounding the feed piston, a tube extending from the second cylinder Vmember into the tube that is Within the feed piston rod, and a packing carried by the piston and surrounding the last-mentioned tube.

25. In apparatus of the character set forth, the combination With a `motor oomprising a cylinder member and a hammer piston `operating therein, of a drill bit operated on'by the piston and having a passage Way for cleaning fluid, a tube extending through the piston and delivering to the passageway of the drill bit, eXtensible feeding means 'connected to the motor for advancing the same to its Work, and extensible means passing through the feeding means for conveying cleaning Huid therethrough to the tube.

26. In apparatus of the character set forth,`the combination with a motor, comprising a cylinder member and a piston operating therein, of a feed cylinder,a feed piston operatingin the feed cylinder and connectedto the motor, heads for the feed cylinder, atubularelement connecting the'heads for 'securing the same to the feed cylinder` said element having comn'iunieation with the feed cylinder and said fe'edpiston having a passa-ge communicating Withthe motor, and means for supplying motive fluid to 'the Y tubular element.

cylinder member, said feed piston having' l passageways therethrough commumoatlng with the interior of theitubular rod,heads Y for the feed cylinders, a'tube connecting the heads for Vsecuring them together, the rear end of saidftube communicating 'with the interior ofthe feed cylinder, and a valved motive Huid supply connectlon 'connected to the frontend of the'tube.` Y

VIn testimony'whereof I have hereunto setmy hand in presence of-two subscribing'witnesses.

lVitnesses:

JAS. R. EL'MENBORF, H. E. FISKE.

Copies of this patent may be obtained 'for five cents each, by addressing the Commissioner of Patents,

' Washington, D. C. f

DaNi-EL fsQ-WAUGH. Y

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