US557686A - Rotary rock-drill with hydraulic feed - Google Patents

Description

2 Sheets-Sheet 1.

(No Model.) Y A. E. W. MEISSNER.

ROTARY ROCK DRILL WITH. HYDRAULIC FEED.

Patented Apr. 7,v 1896 n A v Arr DREW B GRAHAM. PMUTOUNQWALMNGTDN. D1:A

2 sheetssheet 2.

(No Model.)

A. E. W. MEISSNER. ROTARY ROCK DRILL WITH HYDRAULIC FELD.v No. 557,686. Patented Apr. 7, 1896.

Zrz: Y qb ve/Zinn' NiTn STATES ADOLE EMIL IVALDEMAR MEISSNER ASSIGNOR TO THE SIEMENS ATENT Clarion.

AMERICA, OF CHICAGO, ILLINOIS.

ROTARY ROCK-DRILL WITH HYDRAULIC FEED.

SPECIFICATION forming part of Letters Patent No. 557,686, dated April 7, 1896.

Application tiled February l, 1896. Serial No, 577,702. (No model.)

To all whom it may concern:

Be it known that I, ADCLF EMIL XVALDE- MAR MEISSNER, a subject of the Emperor of Germany, residing at Charlottenburg, nea-r Berlin, Germany, have invented new and useful Improvementsin Rotary Rock-Drills with Hydraulic Feed, (Oase No. 53,) of which the following is a specification.

My invention relates to a rotary rock-drill with hydraulic feed, the object of my invention being to provide an improved construction of rotary drill, whereby dydraulic pressure may be employed for effecting the forward feed of the drill and also for retracting the drill.

It has been the practice, in the employment of rotary drills, to conduct water to the drillpoint for facilitating the drilling operation, and where this is done a water-pressure exists which may be utilized for producing the feed of the drill. It is often necessary to employ considerable force in retracting the drill, as, for instance, in the employment of the diamond prospecting-drill, when it is necessary to use considerable retracting force to break olf the core. By means of hydraulic pressure the necessary force required for retracting the drill may be provided, and it is therefore desirable so to construct the drill that hydraulic pressure may be utilized both for feeding and for retracting the drill.

In accordance with the present invention, the drill is constructed so that the hydraulic pressure may be employed for advancing the drill during the drilling opera-tion to thus effect the feed, and may also be employed for retracting the drill. In the construction of the drill employed in practice, a pipe or cylinder is employed, which is rotated through suitable driving mechanism. Moving within the driving-pipe and rotating therewith is a pipe or cylinder upon the end of which the drill is mounted. IVithin the drill pipe or cylinder is provided a piston, mounted stationarily and connected, through ducts or channels extending to the rear of the drill, with a water-supply, whereby water may be admitted to the interior of the drill cylinder or pipe upon one side or the other of the stationary pistonV The stationary piston thus serves as an abutment upon which the water may react in moving the drill-pipe in one direction or the other, according as the water is admitted upon one side or the other of the piston.

The mechanical construction of the drill which I employ in practice is illustrated in the accompanying drawings, in which- Figure lis a longitudinal sectional view through the drill, and Fig. 2 is a view of the drill from beneath.

Like letters refer to like parts in the two figures.

The casing a of the drill is surrounded by a ring a', within which the casing may rotate, the ring d being suitably mounted upon standards. A ring a2 is adapted to be screwed to the Casin g to maintain the supporting-ring a against longitudinal displacement. A screw ai is provided for clamping the casing a in any adjusted position within the supporting-rin g a. Mounted in a bearing, supported upon the casing, is a beveled gear-wheel Z), the shaft h of which is adapted to be connected with a flexible shaft for transmitting a rotary motion to the gear-wheel.

The gear-wheel b meshes with a beveled gear-wheel c, provided upon its face with a block c carrying an annular channel, between the walls of which and the walls of an annular channel provided in the block C2, balls c3 c3 are provided. The plate c2 is mounted upon the casting d, which is secured to the rear of the casing a. To the hub of the gear-wheel c the rotating pipe or cylinder c is secured by screw e'. The pipe e carries at its forward end a sleeve e2, between which and a cap CL4, secured to the end of the casing a., balls e3 e3 e4 e4 are provi ded, the balls being adapted to take up the longitudinal thrust of the pipe e.

Within the rotating pipe e is provided a pipe f, upon the end of which the drill is adapted to be mounted. The pipe f is capable of longitudinal movement within the pipe e and carries a projection f adapted to move within a slot e in the pipe e, whereby the drill-pipe f is caused to rotate with the rotating pipe e, while the longitudinal movement of the drill-pipe is permitted. The forward IOO end of the drill-pipe f is adapted to move within the sleeve e2, while the rear end carries a piston f2, which slides upon the exterior of the feed-pipe g, which extends through the interior of the drill-pipe f and carries at its end a piston g/ which closely its within the pipe f. The feed-pipe g rotates with the pipe e and is connected to the hub of the gearwheel c by a screw g2. The pipe gis provided with a bore g3, which extends through the interior thereof from end to end, the bore communicating at the rear end with chamber h, into which water is admitted when the checkvalve is in one position, water being thus permitted to pass through the bore g3 and to impinge against a disk f4, provided within the pipe f. Then the water is thus admitted, the pipe f is thrust forward to advance the drill. A small hole or opening f5 is provided in the disk f4 to permit the passage of a small quantity of water to the drill-point to facilitate the drilling operation. The feed-pipe g is also provided with a duct g4, which is annular in form and communicates at the rear end, through openings g5,with a chamber h', to which the water is admitted when the checkvalve occupies the proper position. The duct grl communicates at the forward end, through openings g, with the interior of the pipe f at the rear of the piston g. -Water may thus be admitted from the chamber 7L through the duct g'l to the interior of the pipe f at the rear of the piston g', thus retracting the drillpipe f.

To prevent the passage of the water past the pistons, packings g2 and f3 are provided in connection with the pistons g and f2, respectively. Likewise to prevent the passage of the water between the pipe g and its bearings at the rear of the drill, stuffing-boxes 7o 71;/ are provided. The cap of the stuffingbox 7o is accessible by the removal of the cover CZ upon the rear of the casting d, while the cap 7e3 of the stuffing-box 7.o is accessible by the removal of the casting d from the rear of the casing a. Tater leaking through the stuffing-box 7a passes to the chambers h or h', and thus does not iind access to the working parts of the drill. lVa-ter leaking through the stuffing-box 7U' passes to the space d3. I To prevent water which may leal; past the piston f2 from gaining access to the working parts, the slot e5 is sealed from the outside by a plate e6, so that any water that passes the piston f2 will run forward and pass to the eX- terior of the drill between the pipe fand the sleeve e2, the water being thrown from the machine by means of the protecting-disk Z, which also throws o such water as may come back out of the bore-hole.

During the operation of the drill the three pipes e, f, and g rotate together and during the feeding of the drill the check-valve 'm occupies the position indicated in the figure,

whereby water is admitted through the inner doors of the pipe g to the space in front of the piston g', a pressure being thus exerted upon the disk f4, which effects the forward feeding movement of the drill. Then it is desired to retract the drill, the va-lve m is moved into position to disconnect the chamber h from the water-supply and connect the same with thc outlet m', whereby he water from the chamber h may escape. rl`he chamber h is at the same time connected with the water-supply and water is admitted through the duct g to the space at the rear of the piston g', and the pressure exerted upon the piston f2 forces the pipe f backward, thus retracting the drill.

Having described my invention, what l claim as new, and desire to secure by Letters Patent, is

l. The combination with a rotating pipe or cylinder, of a drill pipe or cylinder rotating therewith and capable of longitudinal movement therein, a stationary piston or abutment within said drill-pipe, a feed-pipe having ducts extending to the opposite sides of said abutment; whereby pressure maybe communicated to either side of said abutment to advance the drill-pipe or to retract the same, substantially as described.

2. The combination with a rotating pipe or cylinder, of a drill-pipe adapted to be rotated thereby and capable of longitudinal movement therein, a feed-pipe within said drillpipe and carrying upon its forward end a piston or abutment upon which said drill-pipe is adapted to move, said feed-pipe being provided with a central bore extending to the space in front of said piston or abutment and with an annular duct surrounding said bore and communicating with the space at the rear of said piston or abutment; substantially as described.

3. The combination with the rotating pipe e, of the feed-pipe g situated therein and rotating therewith, the piston or abutment g carried upon the forward end of said feedpipe, said feed-pipe being provided with a central bore extending to the forward side of said piston and an annular duct communicating with the space to the rear of said piston, the drill-pipe f carrying the end pieces f2 and f5, the chambers 7L and h communicating respectively with the bore of the feed-pipe and the annular duct thereof, and the valve m for placing one or the other of said chambers h 7L in communication with a water-supply; substantially as described.

IOC

In testimony whereof I affix my signature V in the presence of two witnesses.

ADOLF EMIL WALDEMAR MEISSNER.

Vitnesses:

GEORG SY, HERMANN BONNE.

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