US887051A - Fluid-feed side-inlet drill-bit. - Google Patents

Description

No. 887,051. PATENTED MAY 5, 1908. J-. H. WIEST.

FLUID FEED SIDE INLET DRILL BIT APPLICATION FILED JUNE 24, 1907.

WITNESSES. IIVVENTOR FLUID-FEED SIDE-INLET DRILL-Bil.

Specification 01 Letters Patent.

Patented May 5, 1908.

Application filed June 24; 1907. Serial No. 380,613.

To all whom it may concern: Be it known that I, Jonx HENRY IEsT, residing at Boulder, m the'county ot Boulder and State of. Colorado, have invented a new that type of hollow rock cutting drill. bits having side inlets, more especially seeks to provide certain improvements in the form of a drill bit and fluid feed coupling devices dis closed, in my Patent No. 845,385, patented February 27, 1907.

\Yhile I have found the construction and arrangement of parts disclosed in the patent aforesaid as generally effective and presenting the advantages set out, yet frompractical experiment I have alsov found. that the side inlot weakens the bit stock, and undersome conditions causes it to easily break at that point.

.l urthermore, by reason ofthe drill bithaving a uniform smooth external face, great strain of the clamping member on the drill .at the side inlet is necessary to hold the fluid feed.

pipe in 'prbper register with the said side inet, a nozzle connection being also necessary to insure a proper flow of the fluid into the side inlet and also for holding the clamping device from creeping laterally on the drill stock.

My present invention especially seeks to provide certain improvements on the patcnted invention stated, whereby toovercome the objections noted, whereby the clamping device can be readily applied to the drill bit, and the coupling of the fluid conveyance ipe therewith made without the use of a nipp e or nozzle end and further whereby the drill bitis sufliciently reinforced at the side opening end to overcome any weakening of the bit at that point. With the above objects in view, my invention comprehends certain details of construction and eculiar combination of arts, all of which be hereinafter fully explained, specifica'lly pointed out in the appended claims, and illustratedin the accompanying drawings, in which:

Figure 1, is a side inlet drill bit with my improvements applied- Fig. 2, is a similar view of the upper end of the drill bit, showing character of drill construction used. Fig. 3, is a transverse section of the part shown in Fig. 1, taken centrally through the pipe 1 and the aperture 20-. Fig. 4,.isa longitudinal section taken on the l-inel4 of Fig 3. Fig. 5; is; a perspective view of the coupling with the fluid feed pi eattached. Fig. 6, is a perspective view 0 the coupling device, opened. In my present invention, the 'drill'bit 2, whichisof that type whose central bore or fluid channel is stopped at the inner orstriking end and connects=with a side inlet 20, as clearly shown in Fig. i -the cutting or drilling end also being of the conventional shape, as shown. v I y In my present invention, the .side'inlet is not threaded and is of uniform diameter its length. At the oint where it has the side inlet 20, the drili st-ock'is reinforced by enlarging it"annularly as at 21.- At theinlet ,side and at that side diametrically opposite the inlet side, the reinforced portion isrecessedor reduced to a-diameter-e ual that of the, main portion of the drill stoc whereby topresent two 0 posing parallel bearing sur faces 22 andeac 1 located between a pair of.

the similar device shown in the patent before referred to, the member 3 having the threaded opening 30 to receive the externally threaded portion of the feed pipe 1 whose end is straight whereby to flatwise engage the drill stock and close over the feed inlet thereof as clearly shown on Fig. 3.

The coupling member 3 has the coupling lever 5, fulcrumed between its bifurcated ends 31 and pivotally joins with the L- shaped coupling member 6, that pivotally connects wlth the locking yoke 8, whose cross bar 81 cooperates with the curved edges 33 of the member 3 and the locking lever 5, the several coupling device members referred tobeing arranged to cooperate the same asin the patent beforementioned, and in the manner clearly understood from the drawing.

In order to insure a ti ht joint between the in 'the manner shown and gasket will be tightly held against the drill bit and insure an air tight joint being made between the pi e 1 and the bit.

'By reason constructin the drill stock escribed, it will be readily apparent that when the coupling device-is adjusted as in Fig. 3, the end of the feed pipe 1 will be positively held up against the feed inlet 20 and from movin laterally .on the drill by reason of the coup ing members 3 arid 6 being located between the opposing shoulders 23 on the drill, and by providing thedrill stock with additional metal at the coupling point, the said drill stock is materially strengthened and danger of break-f sides of the drill; of a feed pipe, a yoke frame that carries said pipe, and mean'sfor clamping the oke frame on the op osing fiat sides of the'd i'ill and for holdin tliie discharge of the feed pi e a ainst the i bit, as set ort 2. The combination with the hollow side forth.

et end of the drill feed inlet drill bit, said bit having an enlarged or reinforced portion at the inlet formed with opposingflat seats and shoulders at the ends of the seats; of a-feed pipe, a yoke frame that su ports thedischarge end of said pipe, said yo e frame includin op os mg members adapted to engage the at S1Cl6S of the drill and seat between the shoulders thereof, and means 006 crating. with the yoke for clamping said yo 3. A hollow drill having a side feed inlet, said drill having the inlet portion annularly e in the drill as set enlarged, and formed with 0 posing flat faces, and shoulders at the en s of the flat faces, the inlet opening in one of the flat faces for the purposes specified.

4. The combination with a hollow drill bit having a side feed inlet and reinforced portions at the side feed inlet port thereof; of a feed pipe a'clamping means that cooperates with the feed pipe for englaging the reinforced part ofthe drill bitand o ding .the feed pipe closely over the side feed inlet and in cont-act vwith the, drill stock, said clam ing means having a groove and a gasket eld'in said groove around the said feed i-pe for engagin the drill stock, substantialFy as shown an described.

JOHN HENRY WIEST.

Witnesses: t

T. S. WALTEMEYER, RUTH E. SHELDON.

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