US1210299A - Pneumatic or steam drill. - Google Patents

Description

R. C. FRASER. PNEUMATIC 0R STEAM DRILL. APPLlcATxoN FILED AuG.2o.1914.

Patented Dee. 26, 1916.

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PNEUMATIC 0R SEAM DRILL.

APPLICATION man Aua.20. 1914.

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PNEUMATIC 0R STEAM DRILL. APPLICATION FILED Aue.20. 1914.

1,210,299. Patented Dec. 26,1916.

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9X o o y0 /M 95 y ewa/w W I FmF/v @@IM 33M 21W RICHARD CLAYTON FRASER', OF CENTRAL CITY, COLOR/ADO, ASSIGNOROFONE-THIBD To w. n. FRAsnno'r DURANGO,

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Speccatonfof Letters Patent.

patented Dec. 26, 1916.

applicati@ sied august 2o, i914. serial No. 857,639.

To all 107mm yzzfmay concern.'

Be it known that; I, RICHARD C. FRASER, a citizen of the United States, residing at Central City, State, of Colorado, have inventeda new and useful `Pneumatic or Steam Drill or Hammer; and l do hereby declare the following to be a full, clear, and exact `description of the invention, such as willy enable others skilled .ini the art to which it .appertainsto malte and use the same.

This :invention relates to a pneumatic, steamy drill or hammer, for drilling rocks `and the like. j

As one of the objects of the invention 'is the provision of an improved yconstruction of drill including a pneumatic vor steam piston and provided with` a rearY yieldably` mounted head,-`whioh relieves the piston and the entire device ofthe shock and jariinci* dent to the blow ofthe drill tool. n c

`The invention aims as another object to provide a piston rod ritied, sol as ,to impart a partial rotary movement to the pistonas it is` driven outwardly, there being a ratchet mechanism to prevent the retrogression of the piston in a rotary direction when' receding. In `this manner the piston receives an intermittent rotary movement. *y Y l Another-object of the invention is the provision of a forward yieldab'le head of the piston cylinder, acting to give or yield as the piston recedes ormoves forwardly,

A further object of the invention is .the`

provi-sion of means forprojecting water or the like through the piston, and into the hole which is being drilled. c c

Inpractical fields the details of construction may be subjected to alterations, falling withinithe scope of what is claimed.

The invention comprises further features and combination of parts, as .hereinafter set forth, `shown in the drawings and claimed.

In the drawings :-Figure1 is a viewin perspective `of the improveddrill mechanism constructed in accordance with the invention. View. Fig. 3`is a horizontal sectional view on line 3*;3 of Fig. `2.y Fig. tis a transverse sectional view 'on .line H of Fig. 2. Fig. 5 is a longitudinal sectional view through the steam or air chest, showing the auxiliary valve in `another position than l that -shown in Fig. 2. Fig. 6 is ahorizontal sectional view through the `steam .for air chest, showing how in the county of Gril'pinandy Fig. 2 is a longitudinal vsectional,

the steamer air passes through the auxiliary valveinto the cylinder. Fig. 7 is a'detail view of the auxiliary valve. Fig. 6L is a sectional view on line (3a-6@L of Fig. 4.' F ig. 8 is .an enlarged detail sectional yview through the parts 28, 80 and 31. y

eferring more yespecially to the drawings, may bev supported inl any suitable manner, and is provided with an elongated trough device or `plate 2y constructed with guides 3, in which the flanges 4 of the cylinder 'are guided. Extending through the elongated trough plate, that is, throughr theribs 7' at the: ends thereof 'are rods 8 having nuts `9 at the ends 10. On the `other end portions of ythe rods tubes 11 are telescopically `arranged, there being washers between the tubes Aand one end of ythe elongated plate. The end portions 13 ofthe frods .f8 extend through the cross.4 heads lll #having nuts 15, there being washersyl between the cross# head and the :tubes 11. Mounted in a bearing 17in the crosshead swivelly is a rod 18 having a `thread 1,9 upon itsfend 2O beyond the crosshead. rlhese threads 19 terminate shoulder *21, between whichy and the in a crank a washer 22 is arranged. Thecrank is rotated or threadedras shown at 23 to engage the thread 19 and is adjusted `jam against the washer 22. The said threads 19 extend in a directiomso that when the'crank is rotated in thel proper direction to feed the cylinder forward, the tighter the crank 2a is arranged against the washer. To further lock thecrank on the threaded the same is split as shownat 25, and a screw bolt'extends through the split end, and `by tightening up the nut thereon, the split portions are ydrawn close together. The rod 18 has anintegral collar L27 between whichand the washer 22 the crosshead 14 is arranged.

A; sleeve x28 is lthreadedupon, the rod [18 asshown.y This-sleeve is mounted in a projection of the lower portion of the cylinder, there being lock nuts'f29and `30 on `each end of the sleeve to Ahold the sleeve yin theprojection-31.4 W'hen the rod 18 is Arotated bythe crank, kthe cylinder and its attending parts are adjusted-forwardly or rearwardly. The

1 designates a base member, ywhich end '19,

cylinder vlias theusual piston 32 mounted in its chamber 5a, provided with ak piston red 38, `through which and the piston abore Baextends yOne and which piston-32 is endof the cylinder has ahead 36-provided 11,0

and piston,

ears 56 of the head 36. The

with a reduced portion 37 extending into the bore of the cylinder. A tube 38 having an integral collar 39 is provided. The end 40 of the tube 38 beyond the collar 39 extends partially through the head and has a ringed nut 41 threaded thereto, thereby holding the tube 38 in place. rlhe end portion 40 of said tube opens into an interiorly threaded cavity 49 of the head, and engagi ing the threads of said cavity is the usual plug 43. A passage 45 is formed laterallyT in the head 36, and t iis passage opens into the cavity, and one end of the passage is threaded to receive suitable connections from a water supply (not shown). The tube 38 telescopes the bore of the piston, in such wise as to prevent the water (which passes through the tube, the piston and the piston rod, so as to reach the bore of the drilling tool, so as to enter the hole which is being drilled) from entering the piston chamber 5a of the cylinder 5. The plug 43 is utilized for the purpose of cutting off a supply of water through the tube and the piston rod which water is used for cooling and washing out the hole that is being drilled. By entirely removing the plug, and closing a valve 48 in said connections of said passage (Which connections are designated by the number 49) the excess water may be removed from the passage through the tube 38, the piston and the piston rod. rFhe other end 50 of said cylinder is provided with a dominant cylinder head 51 having a reduced portion 52, which lits the interior oi' the end 50 of the cylinder. An auxiliary cylinder head 53 is provided, and is supplied with a slight reduced extension 54, which iits an annular recess 55 of the dominant cylinder head. The head 36, the dominant head 51 and the auxiliary head 53 are all provided with lateral projections or ears 56, through which the rods 57 extend. These rods 57 are provided with heads 58, which engage the ends 59 of the rods 57 are threaded, to receive the nuts 60, between which and the ears 56 of the auxiliary head 53, coil springs 61 are interposed. ln this manner the heads are yieldably held in place, and are allowed to give or yield incident to the movement of the piston, thereby slightly opening the opposite ends of the cylinder, thereby affording cushioning ports. The opposite sides of the cylinder at each end are provided with ears 62, through which the rods 57 extend.

The piston 32 is constructed with the usual packing rings 63, and it will be observed that the piston 32 is detachably connected to the piston rod, by means of a plug or pin 64, threaded in place as shown. f

rlhe dominant cylinder head 51 has a cavity 65, in which a ratchet collar 66 isarranged, the teeth of which are engaged by the spring retained pawls 67 which are lof cated or mounted in recesses 68 of the head 51. The ratchet collar upon its circular opening has oppositely arranged lugs 68, which extend into the rifled grooves 69 of the piston rod 33. The grooves 69 are disposed slightly spirally or at an angle to the rod, so that when the piston is driven forwardly a partially rotary movement is imparted thereto, but upon the rearward movement of the piston and the red the ratchet collar slips by the spring pawls which will permit the piston rod to gain another position, in order to receiveV a further partial revoluble movement, when again being driven forward. t will be seen that by this arrangement the piston rod and the tool at its end will receive anintermittent rotary motion. rlhe auxiliary cylinder head is provided with a suitable packing ring 70, held in place by a jam collar 71, which is threaded uponca reduced extension 7 2 oi' the auxiliary cylinder head, there being a spring tensioned pin mounted in a cavity of the head 53, which cavity and spring tensioned pin are designated by the numerals 73 and 74. rlhe piston rod 33 is provided with an extension 35 threaded into a tool holding head 7 6, there being a set screw 77 to secure the head 76 against movement. The head 76 is provided with a bore registering with the bore in the piston rod, and this bore 7 8 of the head 76 is designed for the reception of the drill tool 85, which is held or clamped into position by they tongue 80 of the clamping block 81, which is secured in transversely disposed staple 82, which extends through the head 76 and provided with suitable nuts, by which the staple is held i'irmly in the recess 83 of the block 81. The

tongue 80 of the bloclr 81 extends in a slot 84 in the head 76 and engages a dat portion 85 or the drill tool, thereby preventing movement of the drill tool relative to the head 7 6,

Bolted upon a flat surface of the cylinder is the steam or air chest casing 87, which is provided with an inlet port 88, into which the steam or air pipe 89 (which receives its supply 'from any suitable source, not shown) extends. rlhe port 88 opens into a chamber 90, which is in communication with the auxiliary valve chamber 91, by virtue of the ports 92 and 93. Passages 94 and 95 extend from the interior of the cylinder at each end, partially longitudinally of the cylinder and through the wall thereof and through the under portion of the steam or air chest and open into the auxiliary valve chamber. The portions of the passages 94 and 95 which pass through the wall oir' the chest are designated byA the numerals 945L and 95a. Extending from the auxiliary valve chamber is a port or passage 96 between the ports 94a and 95a, which port 96 or passage passes through a portion of Lthe cylinder and has an exhaust 'pipe or conduit 97 connected place by the c thereto. Also communicating between the interior of the cylinder 5 and the auxiliary valve chamber 91 are ports 98 and 99, which constitute means for the passage of air or steam from the interior of the cylinder to the chamber 91., for not only actuating the auxiliary valve 100, but for cushioning the piston.

rllie auxiliary valve 100 is cylindrical in shape, and is provided with a fiat surface 101, which is engaged by a plug which extends through the upper wall of the chest and designated by the rnumeral 102. Passages 103 and 104 terminating in the ports 105, 106, 107 and 108 yextend through the auxiliary valve, there being additional passages 1.09 and 110 communicating with said passages 108 and 104.

Supposing the valve 100 to be .in such position that the port of the passage 1.1.0 is in communication with the port 93 of the chamber 90, in which case the port 107 is in communication with the port 95EL of the passage 95, and the piston is adjacent the end 50 of the cylinder. In this case steam or air f1 om the chamber 90 will pass through the port 93 through the passage 110, through the passage 104, down through the passage 95, acting upon the piston in such wise as to drive the piston rearwardly, at the same time receding the piston rod and the tool, the ratchet collar slipping by the spring retained pawls, the air or steam previously used to move the piston to a'position adjacent the end 50 of they cylinder exhausts upwardly through the passage 94 and the passage 941 through the port 105 and passage 103 and pass out through 'the port 106 through the passage 96, and finally through the exhaust pipe, which is connected to the passage 96. As the steam or air actsupon the piston to move it rearwardly, a small portion thereof passes up through the passage or port 99 and acts upon the auxiliary valve 100, moving the same suliiciently to cause the port of the passage 109 to register with the port 92. This registration of the passage 109 and the port y92 takes place substantially a little prior to thepiston reaching the rear end of the cylinder 5. However, as soon as the registration takes place, the steam or air passes from the chamber 90 through the port 92, through the port of the passage 109, and down through the port 945L and the passage 94 in the yrear of the piston, thereby acting upon the same to push it forwardly, in which case the air or steam previously used in front of the piston, is being exhausted through the passage 95, up through the portk 108 through the passage 104 and through the port 107 down through the exhaust passage 96 and exhaust pipe. In this case a portion ofthe air or Copies of this patent may be obtained. for ve cents each, by addressing the steam passes up through the port 98 and acts upon the auxiliary valve to move it back to the position previously stated, a little before the piston reaches the forward end of the cylinder. The steam chest consists of two parts 112 and 11,8, bolted together and to the cylinder by means of the bolts 114. A plug 115 is threaded to the wall of the chest, by the removal of which the chamber 90 may be cleaned, or an escape of air or steam permitted, that is in case of an excess supply. Each end of the chest is provided with threaded plugs 116, topermit access to the auxiliary valve chamber.

The passages 98 and 99 extend downwardly, laterally and inclined toward each other from the chamber 91 as shown in dotted lines in Fig. 2, and open into the chamber of the cylinder 5. Where the Vports 98 and '99 open into the chamber 5 are so spaced relative to each other as indicated at 98 in Fig. 5, so that when the piston 32 is adjacent theend 50 of the cylinder', air or steam is allowed to pass into the passage 98, and through the same to the valve chamber, behind one end of the valve, in order to operate it, in such a manner as to permit steam or air to enter the chamber 5a to operate the piston. When the piston moves from the end 50 of the cylinder 5 to the opposite end` the piston 82 uncovers the passage 99, thereby allowing exhaust steam or air to pass through the passage 99 into the valve cham,A ber to move the valve in the opposite direction.

The invention having been set forth, what is claimed as new and useful is In a rock drill; thecombination of a cylinder and a piston operable in said cylinder; of a valve casing on `the cylinder, provided with branch inlet ports; the valve casing near the center having an exhaust duct, and two passages extending to the ends of the cylinder chamber; a valve in the valve casing having' a pair of ports, each alternately registering with the branchy inlet ports, and terminating in branch ports registering with the exhaust and one of said passages, as one of the branches ofthe other valve port registers with the other passage; and means of communication connecting the end of the valve casing chamber and the cylinder chamber, whereby the motive medium behind the piston, when it reaches one of the ends of the cylinder chamber, will enter the valve casing and operate the valve.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

RICHARD CLAYTON FRASER.

"l/Vitnesses GEORGE RAsMUssEN, JOHN PARK.

Commissioner of Patents.

Washington, E. C.

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