US897231A - Automatic fluid-actuated peed meckinism for percussive tools - Google Patents

Description

PATENTED AUG. 25, 1908. D.. S. WAUGH.

AUTOMAHG FLUID AGTUATED FEED MEGHANISM POR PERCUSSIVB TOOLS.

APPLICATION FILED JULY 20,1906.

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D. s. WAUGH. JOUTOTvr/TTTO FLUID AOTUATBD TEBO MEOHANISM TOR PBROUSSTVE TOOLS.

APPLICATION FILED JULY 20, 1906.

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TVT T m w Y UNITEU srn'rns ran OF DENVER, COLORADO, ASSIG'NOR TO THE ILER ROOK DRILL MANU- FACTURING COMPAN Y', OF DENVER., COLORADO.

DANIEL S. WAUGH,

irren AUTOMATIC FLUID-ACTUATED FEED MECH'LNISM FOR PERCSSIVE TOOLS.

Speeicaton of Letters Patent.

Patented Aug. 25, 1908.

Application filed July 20, 1906. Serial No. 327,019.

T o all whom it may concern:

Be it knownthat I, DANIEL S. VVAUGH, a citizenv of the United States, residing in the city and countyof Denver and State of Colorado, haveinvented certain new and useful Improvements in Automatic Fluid-Actuated Feed Mechanism for Percussive Tools; and I do declare the following to be a'full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters and figures of reference marked thereon, which form a part ofthis specification.

My invention relates to fluid actuated mechanism for percussive'tools being more especially intended for tliose of the hammer class, whether of the larger variety usually termed drills or of the small class' generally termed tools. By virtue of my improvement the operating fluid for the tool also performs the feeding function whereby the body of the drill is automatically moved forward longitudinally to hold the bit or cutting device in contact with the material to be penetrated. This feeding function is performed simultaneously with the operation of -the drill and the iiuid for operating the drill and per* ining the feeding function, is supplied from a common source. The mechanism is provided with a conduit through which the o erating fluid enters and in which a hollow s ank upon which the body of the tool is mounted telescopes. The conduit is mounted Iupon a supporting column to have both a longitudinal and swinging adjustment. By virtue of this swinging adjustment, thedrill i may be so positioned as to 'drill a considerable number of holes in the breast of the rock without changing the longitudinal vposition of the mechanism upon the column.4

Having -briefiy outlined my im roved construction, I will vproceed to descri ethe same in detail reference being made to the accompanying drawing in which is illustrated an embodiment thereof.A

In' this drawing, Figure 1 is a longitudinal section taken through the main conduit and the'hellowshank which telescopes therein. In this view the drill body connected -with the said shank is not illustrated. This view may also be said to be a section taken on the in a different position. Fig.. 2 is an elevation partly in section showing the drill body' and a portion of the hollow shank with which it is connected, the latter being shown in section. Fig. 3 is a section taken on the line 3-3 Fig. 1. Fig. 4 is a cross section taken on the line '4 4 Fig. 1, theparts being shown on a larger scale. Fig. 5 is a detail View of the two-part ball which is clamped to the conduit in which the hollow shank telescopes. Fig 6 is an elevation illustrating 'the manner of operating a tool equipped with my improvements.

The same reference characters indicate the same parts in all the views.

Let the immoral 5 designate the supporting column which may'be mounted in the usualp manner. To this column is secured a lateral extension 6 to which is' clamped a sleeve 7 composed of two parts S and 9. Formed integral with the part 9 is a clamping member 1() to which is,hinged as shown at 12, the other clamping member 13. Upon a lug 15 of the clamping member .10 is pivotally connected a fastening bolt 1.4 which when the clamping members are locked' in the clamping position, engages a slotted lug 16 formed on the member 13. The clamping members 10 and 1 3, surround a ball or spherical member 17 composed of two parts clamped to the conduit 18.' By virtue -of this arrangement there is a universal joint connection between the column 5 and the conduit 1S, thus making it practicable to swing this conduit together with its telescoping shank and the drill body, both upwardly and downwardly as well as in a direction passing around thecolunin, within a considerable range of movement.

To what .I will term the rear ythe conduit 18, is secured a coupling head 19 extremity ofl provided with an inlet port 20 with which a Y flexible tube 21 may be connected for introducing the actuating iiuid. Through an extension 22 of the coupling 19, passes a journal 23 forming a part of a rod 24 whose body portion is angular, preferably cruciform in cross section (see Figs. 3 and 4).- To the outer extremity of the journal 23, is secured a holder 25 through which is passed the bar 26 of a hand crank 27. This bar is adjustable in the holder by means'ofaset bolt 2S. Mounted to telescope in the conduit 18 is a hollow shank 29 in whose rearward extreme ity is inserted a plug 30 whose exterior is slightly cone-shaped to fit the hollow shank the rod 24 whereby thebody of the drill may Vwhich is correspondingly fashioned for thepurpose. This plug 30 is held in place from the rear by means of a screw plug 3l threaded into the shank and provided with a gasket 32 which forms a fluid tight joint between the hollow shank and the main conduit. The plugs 30 and 31 are apertured to receive the rod 24, the openings in the plugs being so shaped that the turning of the rod-24 also rotates the shank 29 within the conduit. The construction is also such that the hollow shank is allowed to slide longitudinally on be forced forwardly when in operation. To the forward extremity of the hollow shank 29 is connected the body of the drill or tool 38, the said body portion havingan interiorly threaded socket 34 in which the rear extremity of the shankis threaded. The rear extremity 35 of the drill casing is provided with a port 36 communicating with the hollow conduit, for the purpose of admitting operating fluid to the body of the casing F3 of the tool. This port 86 is controlled byavalve 37.

Thevplugs 30 and 3l are provided withan orifice 38 through which the operating fluid passes from the main conduit 18, into the hollow shank 29 behind the plug 30. -Thus when the tool is in operation, the hollow shank 29 is filled with the operating fluid which acts to drive the shank together with the rlrill body forwardly until the bit 39 engages the breast of the rock or the bottom of the hole in which the -drill bit is working. The operating fluid after leaving the port 20, enters a chamber 40 i'n the rear of the plug 31 and at the same time passes through the orifice S8 into the hollow shank.

The forward extremity of the cruciform red 24 isprovided with a head 24A in the rear of which is placed a rubber buffer 24B. This head and buffer form a stop which engage the plug member 3U and limit the forward movement of the shank and drill body whereby the shank is prevented from escaping from the hollow conduit in which it tele-- scopes.

Having thus described my invention,what I claim is:

l, In automatic feed mechanism for percussive tools, the combination of a main fluid conduit, a hollow shank telescoping therein, therearward extremity of the shank being provided with a plug, means for delivering operating fluid to the rearward extremity of the conduit, the plug of the -hollow shank being provided with an orifice for the passa e of fluid, a guide rod sup orted by said p ug and passing into the hol ow shank and provided with a stop at its 'forward extremity to limit the forward movement of the shank, a tool casing connected with the, shank, the said casing being in communication with the fluid passing through the hollow shank.

2. In apparatus of the class described, the combination of a hollow conduit, a shank mounted to reciprocate in said conduit, a

tool casing connected with the forward extremity of the shank and movable therewith, the rear extremity of the shank being provided with a plug, a guide rod passing .through the'said plug and provided with a stop at its forward extremity to limit the forward movement of the shank and casing, a suitable support for said rod carried by said conduit, the rear extremity ofthe rod protruding from the conduit and being journaled in said support, and means connected with the said rod to permit rotation ofthe shank and its connections, the rod where' it passes through the plug of the shank being constructed to cause the shank and rod to rotate in unison.

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

DANIEL S. WAUGH. I/Vitnesses DENA NELSON, A. J. OBRIEN.

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