US1391628A - Percussive-tool - Google Patents

Description

H. V. HAIGHT.

PERCUSSIVE TOOL.-

APPLICATION FILED DEC. 11, 1913.

PatentedSept. 20, 1921.

11v mm v aspecification.

1 drill in section;

BDI TA SL EN v OFFICE.

HARRY V. HAIGHT, OF SHERBBOOKE, QUEBEC, CANADA, ASSIGNOR TO INGERSOLL- RAND'QOMPANY, JERSEY CITY, NEW JERSEY, A CORPORATIONOF'N JERSEY.

rmwossrvnroon Specification Letters Patent. Patented Sept. 20, 1921.

Application med December 17,1918, Serial no. 2 7,1.

T 0 aZZ whom it may concern:

Be it known that I, HARRY V. .HA'IGHT, a subject of the King of Great Britain, residing at Sherbrooke, in the Province of Quebec, Dominion of Canada, have invented a certain new and useful Improvement in Percussive-Tools, of which the following is This invention relates to percussive tools and in particular to, a fluidoperated percussive or hammer drill admitting a part of the actuating fluid and also a cleansing fluid downthe drill steel'to free the drill bit; from cuttings. v

The objects of the present invention are to provide a mechanism for controlling the admission of cleansing fluid as'well as a part of the actuating fluid to the drill steel from thetool to force the cuttings awayfroIn-the cutting edges of the drill steel to provide mechanism wholly contained within the drill for accomplishing thisfunction', the mechanism being operatively controlled by movement of a single means.

With the above and other objects in viewmy invention consists in the features of con struction and operation set forth in the following specification and illustrated in the accompanying drawings, forming a part hereof, in which Figure 1 shows a longitudinal view of the Fig. 2, a partial longitudinal view taken through another section;

Fig. 3, a sectionalview of a fica'tion, and

Fig. .4. is .a transverse sectional view on line l-Ll of Fig. 1 looking in'the direction of the arrows- Referring more particularly to the drawings 1 refers to the cylinder having attached at its forward end a front'head 2 within which is contained an anvil block 3. A chuck 4.- is provided fitted against the forward end of front head 2 within which is contained the drill steel 5. At the rear end of the cylinder 1 is providexi a back head 6 within which is contained the throttle valve 7 controlling the supply ofmotive and cleansing fluid. In rear of the back head 6 is the feed cylinder, 8 of the usual form found in stoppers supplied with fluid through a conduit 9 extending from the throttle 7. As is usual in this type of tool the front head, cylinder, back head, and feed cylinder are held slight m nprgidly together by side bolts, not shown.

ithin the cylinder 1 operates a piston or hammer 10 at the forward end of its stroke striking the anvil block 3. The piston is of the usual form so will not be further described. Extending forwardly from the throttle valve 7 through thecylinder 1 is a passage 11 joining a continuingpassage 12 within thefront; head terminating in connected grooves 13pr0vided in the annular inside surface of the front head 2. The function of the grooves 13 is to form an air seal around the anvil blockto preventv the passage of the water in .either direction from th water groove 21, and the motive fluid pressure maintained inthe sealing grooves 13 should be greater than the pressure of thewater in the water groove 21. vThe passage 11 .at its rear end joins the throttle I valve 7 in a position to intercept passagel f and radial opening 15 provided within the throttle valve 7 which are directly in communication with the sourceof fluid supply. Another passage 16 extends longitudinally of the cylinder lintercepting-a short. passage 17 within the back head 6' whichintercepts a portion of the throttle valve 7 in which is contained anopening 18 in communication, when in its open position, with a Water connection 19. The forward end of the passage 16. joinsa passage 20 through,

the front head 3 terminating in the annular" groove 21 so that a. continuous passage is provided within the tool forwater to be admitted to the anvil block. The anvil block" 3 is provided with passages 22. and 23 intercepting respectively the air and water passages '12 and 20 provided withinthe front head which intercept each other and extend to the front end of the anvil'block in a single passage'24. The passage'24'is central ofthe anvil block 3 and is directly in alinement with the central hole provided within the drill steel 5. Inth modification shown in Fig. 3 the motive fluid supplied to the anvil block to force the cleansing fluid down the drill steel is taken directly from the front end of the cylinder 1 through a passage 25. This passage 25 is in communication with two annular grooves 26 which are in every way similar to the grooves 13 shown in Fig. 1. From the rearward groove 26 the fluid passes through passages 27 and '28 to the passage 29 in which the motive fluid and cleansing fluid commingle and pass into the drill steel 5. The water nipple in this modification is attached at one side of the front head 2 as shown at 30, communicating with the passage 29 by means of a groove 31 provided in the front head and passage 32 pro vided in the anvil block.

From the above description it will be seen that a construction has been provided permitting cleansing fluidto be admitted to th anvil block of the drill and .from there into the drill steel from a source of supply controlled by a valve preferably located at the rear end of the drill; but as shown in Fig. 3 the-source of supply may be located near the front head of the tool. Also, a passage. is provided for fluid under pres-.

sure to be admitted to the anvil block, to aid the forcing of cleansing fluid down the drill steel. Both ofthese passages are con-.

trolled by but one throttle handle in the preferred construction, movement of which first opens the passage 11 to admit motive fluid to the anvil block, after which continued movement of the throttle serves to open passage 16 to admit the cleansing fluid. It is to be understood that the present showing and description disclose only certain specific embodiments of my present invention, and that other forms and m.odi-.

fications are included within the spirit and scope of the invention, as expressed in the appended claims.

What I claim is:

1. In a percussive tool, a front head construction'comprising a front head, an anvil block slidably mounted therein, a water conduit leading through the side of the front head and'the side of the. anvil block'to a Eointintermediate the length of said anvil lock in a central passage extending to theforward end of the anvil block, for conductsaid anvil block intermediate of its length,

' a passage through the side of the anvil block for connecting the said water groove with a central passage extending to the forward end of the anvil block for conducting water.

to a hollow drill steel, a water conduit leading through the side of the front head to said water groove, one of said members having annular sealing grooves. at each side ing motive fluid under pressure to said sealing grooves to prevent water from passlng in either direction from said water groove between the anvil block and the front head.

3. In a percussive tool, a front head con- I struction, comprising a front head, an anvil block slidably mounted therein, an annular groove surroundlng said anvil block 1nterof said water groove, and means for supplymediate of its length a passage through the side of the anvil block for connecting the said water groove, with a centralpassage extending to the forward end ofthe anvil block for conducting water to a hollow drill steel, a water conduit leading through the side of the front head to saidwaterigroove, annular seahng grooves in said anvil block 'ateach side. of said water groove, and means for supplyingmotive fluid under pressure.

to said sealing grooves to preventwater from passingin either direction from said water groove between the anvil block and the front head.

at. In a percussive tool,a front head con struction, comprising a front head, an anvil block slidably mounted therein, an annular groove surrounding said anvil block intermediate of its length, a passage through the 1 side of the anvil block for connecting the said water groove with a central passage ex;

tending to the forward end of the anvil block for conducting water to a hollow drill steel, a water conduit leading through the side of the front head to said water groove,

annular sealing grooves in said anvil blockat each side of said water groove, and means for maintaining motive fluld in. said sealinggroovesi under higher pressure than the water contained I in the water groove to prevent water from passing in either direction from said watergroovebetween the anvil block and front head. y I

In testimony whereof I have hereunto set my hand. I

HARRY v. HAIGHT.

Images