US1864148A - Hole cleaner - Google Patents

Description

June 21, 1932.

L. L. VRICAZHARDSQN HOLE CLEANER Filed O Gt. 24. 1928 2 Sheets-Sheet 1 INVENTOR ED L R/cb/A FP50/v 4f M A oRNEYs June 2l, 1932. 1 l.. RICHARDSON 1,864,148

HOLE CLEANER lFilecl Oct. 24. 1,928 2 Sheets-Sheet 2 2 on N w INVENTOR ED L Plc/m kso/v B M4540@ AT ORNEY5 Patented June 21, 1932 UNITED STATES OFFIC LED L. RICHARDSON, OF CLEVELAND, OHIO, ASSIGNOR TO THE CLEVELAND ROCK DRlLL COMPANY, F CLEVELAND, OHIO HOLE CLEANER Application mea october 24,1923. serial No. 314,780.

The present invention is directed to improvements in hole cleaners for use in connection with percussive drills.

The primary object of the invention is to provide a device of this character constructed and arranged in such manner that the fluid controlling valve can be held in a position to permit pressure iuid under line pressure to pass through the drill and drill steel to blow the cuttings from the drill hole.

Another object of the invention is to provide a device of this character which is simple in construction, and which can be conveniently controlled by the drill runner.

The above and other objects and advantages of my 'improvement will fully appear from the following description with the accompanying drawings and be explicitly, defined in the appended claims. It will be understood, however, that this disclosure is illustrative only, and that the principle of the invention can be embodied in construction other than the one speciied herein.

In the accompanying drawings Figure 1 is a. sectional diagrammatic view showing the vparts in their normal working position.

Figure 2 is a similar view, showing the position of the parts during the blowing opera- 131011.

Referring to the drawings, 1 designates the cylinder in which is reciprocable the piston hammer 2 having a fluted extension 2 for rotating the chuck 3, and thus the drill steel 4 therein, rotary movement being imparted to the hammer by the rie bar 5 and ratchet mechanism 6. The construction thus described is conventional, and no claim is made therefore specifically.

Associated with the cylinder is a valve chest 7 in which is provided a chamber 8, said chamber having fitted in its ends plugs 9 and 10, the latter having a stem 11 which extends to and through the plug 9 and upon this stem is slidable the sleeve 12 of the valve 13. The valve 13 includes a central flange 14 and spaced terminal flanges 15. Surrounding the plugs 9 and 10 are end chambers 16 and 17, respectively, the former opening to atmos- 50 phere through the duct 18. Motive fluid is introduced to the valve chamber 8 through the supply port 19 which opens into annular groove 20, there being upon opposite sides of this groove annular channels 21 and 22, which have communicating therewith, respectively, thev main fluid vdistributing passages 23 and 24, which open into the front and rear ends of the hammer chamber 25., respectively.

The walls of the chamber 8 has formed E,

therein' annular exhaust channels 26 which are open to atmosphere through the ports 27. The end chambers 16 and 17 Vare in communication with the hammer chamber 25 through the crossed kick 0E ports 28 and 29, respecbersv 31 vand 32 dened bythe inner ends of' the'plugs 9 and y10 and adjacent ends ofthe sleeve 12. The construction and operation of the valve isthe same as that disclosed in the handle and thus the shank in selected positions. The shank has formed in its in-l nerlend relatively. short angularly disposed communicating ports 38 and `39, and a diagf fr;

onally disposed passage 40, which when in the position as shown in Figure 1 places thev duct 41 and port 42 in communication in order-that residue air in the chamber 17 canV i pass therefrom to atmosphere, asl it doesv through the duct 18, upon reversal of the.

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Briefly the operation is as follows:

The passage 40 is in communication with the duct 41 and port 42 in order that the residue air will exhaust from the chamber -17 and when the parts are in this position Y the valve 13 is free to reciprocate, under the action of motive fluid admitted alternately into end chambers 16 and 17 from the cylinder by way of the crossed kick off ports'28 and 29 respectively, to control the distribution of pressure fluid to the hammer chamber to actuate the piston hammer, and in the same manner as disclosed in the patent -re ferred to. After a period of drilling it is Y found desirable to blovxT 'the cuttings from the hole, the valve 34 is rotated a quarter turn, thus rotating the shank 35 thereof, whereupon the passage 40 is moved: out of registration with the duct 41 and port 42 rto I permit the escape of air from the chamber 17, and at which time the piston hammer closes -the passage 29 to prevent leakage of air Vfrom the chamber 17. Live air from the supply port 19 will enter the orifice 30 into the chamber 32 and acts upon one end of the sleeve12. The chamber 17 will be supplied .withlive' air from chamber 32 throughpassage`33, ports 38 and 39, and passage 43. The live air in the chambers 32 and 17 will overcome the pressure of the live air reaching chamber 16 through thel port 28, thereby holding the valve in the positionshown in Figure 2. The major quantity yof air from the line `will enter the chamber 25 through the passage 24 driving the piston forwardly and from thence past the rifle bar 5, through the bore 44 of the hammer extension into the bore 45 of the drill steel. The air flowing thus, ,under linepressure w-illobviously blow Lthe 4 cutting TAfrom the hole being drilled.

" After the hole has been blown, the valve 34 audits shank are'turned reversely in order thatthe parts will again be positioned'to permit free movement of the valve and reciprol cation of the piston hammer.

`What is claimed 'is .y Y

The combination with a cylinder having a piston hammer reciprocable therein, of a valve chest communicating with a source of motive fluid, a stem in the chest, a valve slidable on the stem foreffecting the supply and exhaustof the motive fluid to and from the cylinder, said chest having-chambers at the opposite ends 0fy saidkvalve communicating Y with .the opposite ends of said cylinder to e'ect reciprocation of said valve, a valve shank rotatably associated with said stem, said valve shank Aand said stem having cooperating ports arranged in one position of Y, said valve Ashank to conduct motive fluid through the stem to vone of said chambers to actagainst the end of the valveY and hold the same inactive.

In testimony whereof I-affiX my signature.

LED L. RICHARDSON.

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