US1809141A - Handle for rock drills - Google Patents

Description

June 9, 1931. F. MOCK 1,809,141-

HANDLE FOR ROCK DRILLS Filed D90 21, 1927 INVENTORQ 01112 E 0011;

I [:75 ATT NEY Patented June 9, 19 31 a t-m sm r ns' Joan E. Moon, on IYPHIILLLIPSBUBG,

, drummer messy CITY, NE J-nnsnv, A charmsron or new trnrtsnv' Haunts from noon nit-nits Application "filed necemb'er 21, 1927'; sefiaino.- 241;5s5.

l'l his invention relates to' 'ro ck drills, but

more particularly to' a handle for fluid actuated rock drills 'of'the hand 'held type.

il he objects of the invention are to term a rugged and compact h'andle land'tofreduce the o'ost of manufacturing' handles of this type O her objects will be in part obvious and in part pointed out hereinafter.

In the drawings illustrating the invention,

Figure 1 is a sectional elevation of the rearward portion of a rock drill having the invention applied thereto, and

Figure 2 is a transverse view Figure 1 on the line 22 looking in the direction indicated by the arrows.

Referring to the drawings, the invention is shown embodied in a rock drill of the hand held type having a cylinder A in which is disposed a reciprocatory hammer piston B.

The rock drill illustrated is substantially like V V the correct position of therod K with re that described and claimed in United States Patent No. 1,096,087, entitled Fluid operated percussive tool granted to Lewis G. Bayles May 19', 1914. The piston B accordingly has i a rearwardly extending. shank C on which is formed aneck D adjacent the piston head for controlling the flow of pressure fluid into the rearward end of the cylinder. rearward end of the cylinder A is disposed a distributing valve E for controlling the ad-j mission of pressure fluid to the front end-of vthe cylinder. I

A closure is provided for the rearward end of the cylinder A by aback head F seated on the cylinder to which it may be secured in any suitable manner.

In accordance with the present invention,'

the back head F is provided with a transverse bore G near its rearward end. The bore G may spect to the back head'F, said rod is protaken through rdri-ll.

In they be of uniform diameter throughout its length, and at. oneend o f the back fluid into the passageway Y. p i p 7, Beneath the aperture a valve chamber ,i nw'snnsuy, secre ion "mo r'nenrtsonninnnn I vided withan enlarged portion vLat oneend thus formi-n-ga shoulder O at the innermost end of the portion L to abut the side-of the back head -F z'Ontheopposi-teend o'fthe rod K-?is disposed a sleeve -P 'hav-in-g anerter-nal diameter substantially equal @to that of the e'nlargedportion 'Lof the rod. -I Iandleugrips Q, and It are-disposed on theenlarged gportion Lof the rod -and on the sleeve The handle grips are intended to be-g raspedby the operator if or manipulating the rock drill and may consistof rubber (Jr-other flexible mate'r'ia-l -t o protect the operators hand against theefl'eots of, the vibration Or n-1e rock The handle may T s 1 91a inoperative position in any suitable manner.

the gI-JI'GS-Bl'lt Instance however, this is .ac-

enlarged portion L l which bears against .t"he The V .yhandlelgrip Qis similarlyiheld by a hollow outermost end otfi the ha'ndle fg rip 'IRQ nut'Tjscre'w'ed on the end of the rod K. A

w-asl'ier U is intenposed between-the nut T and the; outer endfiof-the -handle grip Q and bears against tli'eisleeve Pto press the inner end '(j f thje sleeve together-with tliatof the handle grip Qwag-ainst the sideaoif the back 'head F. Preferably the sleeve '1 is of the same length as the handle grip vQ so that the' washer" U may hear thereagainst without distontirrg the said-handle grip.

In one end of therod K is "formed an oil I, chamber V having a threaded opening V ly e le by t-filler plug screwed i into the opening An oi-l cartridge'Y or a well jk'now'n type is disposed 'ber- V to control the wflo w of 'oil thencfroml In the opposite end of the rod K is fornie'd a-pa-ss'ageway Y into which pressure fluid for operating the drillmay 'beintroduced Such the oil champressure fluid may be conveyed-from a source e f supply through: a hosefnotlshown) "but which may Joe connected to the threaded extension Z"on the endof thenut The eX- tension Z is hollow r91- admit'tingpressure b which communicates with the aassaflewa .c g l A v vis y her through a passage 03. A throttle valve 6 is disposed in the valve chamber 6 to control communication between the passage 0 and an inlet passage f leading from the Valve chamher I) to the rearward end of the cylinder.

The throttle Valve 6 is normally held in closed position by a spring g.

To the end that the throttle valve 6 may be conventiently manipulated by the operator Without releasing his hold on the handle grips a throttle valve lever 72, is pivoted in a slot j in the side of the back head and bears against a projecting end is of the throttle valve. The throttle lever-is of angular shape and has an arm 0 which extends generally in the direction of the handle grip R against which it may be pressed to maintain the throttle valve 6' in the open position.

By means of the present invention a rugged handle structure may be obtained. The back head F may be relatively short as compared with other back heads of this type and the objectionable protuberances usually formed on back heads of this type are eliminated.

I claim:.

1. A handle for a fluid actuated rock drill, comprising a back head having a transverse bore, atubular rod in the bore extending on opposite sides of the back head, said rod having a Chamber for oil and a passageway for pressure fluid, means in the back head for controlling the admission of pressure fluid from the rod to the back head, tubular handle grips on the ends ofthe rod, means on the rod interlockingly engaging the back head for preventing rotationofthe rod with re spect to the back head, an integral flange on one'end of the rod forming an abutment for one handle grip, and a hollow nut on the opposite end of the rod for maintaining the other handle grip on the rod.

2. A handle for a fluid actuated rock drill, comprising a back head having a transverse bore, lugs on the back head disposed on. opposite sides of the aperture, a tubular rod in the bore extending on opposite sides of the back head, said rod having an oil chamber in one end and a passageway for pressure fluid in the other end, flat surfaces on the rod to engage the lugs for preventing relative rotation between the back head and the rod, handle grips on the ends of-the rod and abutting the back head with their inner ends, a. flange on one end of the rod to act as an abutment for the outer end or" one handle -grip, and aunt on the opposite end of the rod abutting the outer end of the other handle grip, said nut having a threaded portion for connection to a pressure fluid supply line.

3. A handle for a fluid actuated rock drill, comprising a cylinder and a back head having a transverse bore, lugs on the back head disposed on opposite sides of the aperture, a tubular rod in the bore extending on opposite sides of the back head, said rod having an connection to a pressure fluid supply line, a

valve chamber in the back head, passages in the back head connecting the valve chamber to the oil chamber and the passageway, a

throttle valve in the valve chamber controlling co nunicati'on between the passages and the cylinder, and a lever pivoted to the back head ad acent one handle grip formanipulatmg the throttle valve.

specification.

JOHN F. Moore S5 in testimony whereof I have signed this

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