US1055844A - Pressure-driven drill. - Google Patents

Description

A..L. WESTRICH. PRESSURE DRIVEN DRILL. APPLICATION HLBD MAY 2v, 1910. 1,055,844 Patented Mar. 11, 1913.

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A. L WESTRICH. PRESSURE DRIVEN DRILL.

APPLwATIoNILE-D MAY 27, 1910.

Patented Mar. 11, 1913.

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.ALPHONS L. WESTRICH, OF SALT LAKE CITY, UTAH.

PRESSURE-DRIVEN DRILL.

Specification of Letters Patent.

Patented Mar. 11, 1913.

Application filed IVay 27', 1910. Serial No. 563,829.

Lake and State of Utah, have invented certain new and useful Improvements in Pressure-Driven Drills, of which the following` is a specification.

This invention relates to an improvement in pressure driven drills, one of the objects thereof being to provide a drill of this character whereby the shifting of the inlet and outlet valves for the driving medium is effected automatically by the reciprocat-ing members of the drill.

A further object of the present invention resides in automatically effecting the partial rotation of the reciprocating member of the drill upon the rearward stroke thereof.

Further objects and advantages of the present invention will appear from the following description with reference to the ac companying drawings, wherein Figure 1 is a side elevation of the drill embodying my invention, Fig. 2 is a longitudinal section of Fig. 1, Fig. 3 is a view similar to Fig. 2 with the supporting and adjusting elements shown in Figs. 1 and 2 removed. Fig. 4 is a cross sectional view taken on the line 4 4 of Fig. 2, Fig. 5 is a cross sectional view taken on the line .5-5 of Fig. 3, Fig. 6 is a detail view of the reciprocating tool carrying member of the drill, Figs. 7 and 8 are respectively a. side elevation and a cross sectional view of the oscillating valve casing 20, Fig. 9 is a detail view of the rifled bar, Fig. 10 is a detail view of the valve which controls the flow of the pressure medium into the reciprocating cylinder, Fig. 11 is a detail view of the bar which actuates the valve disclosed in Fig. 10.

Referring to the accompanying drawings, wherein like numerals indicate like parts throughout the different views, the numeral 1 indicates a hollow cylindrical casing provided with the front and rear heads 2 and 4,

Y respectively. The rear head 4 of the casing end thereof. This tube provides a means for conveying a pressure medium into substantially the center of the chamber formed within the' casing 1. The port 10 may be in communication with any suitable pressure fluid supply, so that a continuous supply of fluid will be available. Within the casing 1, I have provided a guiding member or bushing 15 which closely tits therein, thus dividing the chamber into substantially two equal parts.

The reciprocating member of the drill is designated by the numeral 16 and has a bearing formed within the front head 2 which has a packing 17 suitably secured therein to prevent excessive wear by reciprocation of the member 16. The reciproeating member 16 comprises a hollow piston or cylinder 19, and a solid stem or shank 19', the cylinder 19 being of such diameter that it has a close sliding tit within the bushing 15 of the casing 1. The rear head of this cylinder is formed separately and has screw threaded connection with the cylinder body. A suitable aperture or opening formed in this cylinder head constitutes a bearing for the tube 12, which extends into the cylinder 19. In order to prevent the escape of the pressure medium from the cylinder 19, the cylinder head carries a packing gland 1S which closely engages the tube 12. It will be seen` that within this cylinder 19, a casing 20 is mounted, pro vided at the front and rear ends with apertures 21 which register under certain conditions with the ports 22 formed adjacent to the opposite ends of the cylinder 19. As will be seen moie clearly in Fig. 7, this casing 20 has oppositely disposed wedgeshaped slots 23, which receive the depending ends 25 of the `reciprocating bar 24, said bar being secured to and carried by the cylinder 19. To suitably secure the bar 24 in position, the cylinder 19 is formed with a longitudinal slot of the requisite dimension to readily receive the said bar, when the bar is in position it will be appreciated that the depending ends must at all times be held in position to engage with the slotted ends of the casing 20, this being accomplished by securing a plate 28 to the cylinder 19 directly above the bar 24 by either ydove-tailed connection therewith or as shown in Fig. 6, by securely bolting the plate to the cylinder. The plate 28 is of the same length as the slot, while the bar 24 is shorter, so as to permit longitudinal movement thereof relative to the plate and cylinder.

The tube 12 which extends within the cyl.- inder 19 has an enlarged head portion 27 formed with a'plurality of grooves on its outer face which are adapted to receive suitable packing. This head portion divides the chamber within the cylinder 19 into two separate and distinct chambers A and B, (see Fig. 2). IVithin this head portion 27, a hollow conical shaped head 28 of the ritled bar 29 snugly fits within the head 2T and is securely held therein by having screwthreaded connection with the inner face thereof.

It will be noted that the head 27 is provided with a pair of ports extending in opposite directions and located in diiierent planes; it will also be noted that the hollow head of the riiied bar 29 is likewise provided with a pair of ports corresponding to the ports within the head 27. rI hese ports are so arranged that one of them extends into and has communication with the chamber A of the cylinder 19, while the other one communicates directly with the cylinder B.

In order to control the ow of the pressure medium into theA chambers A and B, there is provided a small conical shaped valve 30 which has a single port 31 which communicates with the passageway formed by the tube 12. Itigidly secured to this valve is an upwardly extending stem 32 which engages in the diagonal slot 32 formed in the slide bar 33, this slide bar being carried within a slot formed in the head of the riled bar 29 and passing through the' enlarged head portion 27 of the tube 12. It will be understood that this bar 33 is free to slide in either direction upon contacting with the opposite ends of the cylinder 19.

From the foregoing description, it will be seen that the ope-ration of my invention, up to this point, will be as follows-*Taking the parts in the position shown in F ig. 2, the pressure medium which is conveyed from the chamber 11 by the tube 12 will be permitted to pass into the chamber B of the cylinder 19 and will immediately cause the reciprocating member 16 to move forward. As soon as the rear head of the cylinder 19 comes in contact with the bar 33 it moves said bar forward as shown in Fig. 3, thus causing the valve 30 to oscillate so that the port which formerly permitted the fluid to pass into the chamber B will be cut ottn and communication established with the chamber A so that the reciprocating member 16 may be driven rearwardly. In order to provide :tor the exhausting of the pressure medium from the two chambers of the cylin der alternately, the valve casing 20, as has heretofore been stated, is provided with ports 21; now as the cylinder completes its rearward stroke as shown in Fig. 2, the head 27 will contact with one of the depending hooked ends of the bar 24- and force the same forward, thus causing the one side of one ot the hooked ends of the bar 21 to engage with the beveled or angular side of one oi the slots 23. As this bar 2l moves in a'straight plane relative to the casing 2O it will force the said casing to oscillate until the ports 21 register with the corresponding ports 22 formed in the cylinder 19 thereby permiti ting the steam to exhaust into the chamber formed between the casing 1 and the cylinder 19 from which chamber it in turn eX- hausts through the exhaust port 3a escaping to the atmosphere through the central exhaust valve The action of the valve casing 20 is substantially the same when reciprocating member 1G completes its forward stroke.

I claim 1. In a drilling machine, the combination with a reciprocating member comprising a cylinder, of a hollow stationary member projecting therein, an enlarged head portion secured thereto, dividing the cylinder into separate working chambers, means for snpplying a pressurel medium to said chambers alternately, the head portion having ports communicating with each of the chambers, and an oscillatory valve positioned within the head portion and operable upon the reciprocation of the cylinder to close the ports communicating with one chamber and open the ports communicating with the other chamber, alternately.

2. In a drilling machine, the combination with a reciprocating cylinder, oi a hollow stationary member projecting therein, and dividing said cylinder into separate working chambers, means carried by the stationary member having a port communicating with each of said chambers, means for introducing iiuid pressure into said stationary member and an oscillating valve operable upon the reciprocation of the cylinder to close one of the ports and open the other to permit the passage of the iiuid into each of the working chambers, alternately.

ALPHONS L. IVESTRICI-I.

In presence of two witnesses:

FRED A. STRAIN, Iii-IEA TAYLOR.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents. Washington, D. C.

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