US978586A

US978586A - Rock-drill.

Info

Publication number: US978586A
Application number: US54646610A
Authority: US
Inventors: Charles A Hultquist
Original assignee: Individual
Current assignee: Individual
Priority date: 1910-02-28
Filing date: 1910-02-28
Publication date: 1910-12-13
Anticipated expiration: 1927-12-13

Description

- C. A. HULTQU'IST.

- ROCK DRILL.

APPLICATION PIKED IEB.28, 1810.

Pdtented Dec. 13,1910.

3 BHBETB-BHEET 2.

mum

1 WWI/dz! I 61mm c. A; HIILTQUIST.

BOOK DRILL. APPLIOATIOK rnnn rmma, mo.

Pa tntqd Dec. 13,1910.

3 SHEETS-SHEET 3.

PATENT OFFICE.

i UNITED STATES omutws a. nunreursr, or BISBEE, ARIZONA TERRITORY.

iTottll whom it may concern 11 ii Be it known thatyI, CHARLES A. Hour:

1M UIST, citizen of the United'States, residing 1 at Bisbee, in the county of Cochise and Territory of Arizona, have invented certa n new and useful Improvements in Rock-Drills, of

which the following is a'specification. 1 This invention relates to rock drills and has for its object the provision of a drill of "simple and compact construction inwhleh wear on the several parts incident to the operation thereof is reduced to a minimum. A further object is to provide a novel form of valve for controlling the admission of air "fo'r other fluid to the cylinder.

further object is to provide means for I reciprocating the valve to alternately open and close the inlet ports, and fluid pressure means for preventing rearward movement of said valve at the end of each stroke.

A further object is'to provide means for rotating the piston, and means for balancing the rifle bar of said piston, thus to prevent t the latter from 1 cylinder. I w "A further ob'ect is to provide moans "ffwhereby the fiui supply pipe may be'posi- 'tioned on either side of the drill without the necessity ofdeta'cliing said fluid supply pipe. A still further Ob ect of the invention is as toincrease their utility, durability and flicien'ey.- 1

l urther objects and advantages will ap- "pear in'the followingdes'cription, it being understood that various changes-inform, proportions and minor details of construc- ,tion may be' resorted to within the'scope of the appended claims. j y For a full understanding of the invention """and the'merits thereofand also'to acquire a knowledge of the details'ofconstruction erence is to be had to the following descripion and accompanying drawings, in which: igurel isa' verticalsectional view of a k drill constructed in accordance with my invention, showing the piston or; hammer at the completion of its working stroke, 'g.. .is a similar view showing the piston Orhaminer ne ar'the end of its return'stroke; "Fi" .f3fis a horizontal sectional view of the "valve; Fig. 4 is an end view; Fig. '5 isa ven ticiil sectional view showing the construction? or the and ratchet revolvin'g't e piston? binding or wedgi'ng .in the generally to, improve this class-f devices so and-the means for effecting the result, rcfmechanism max-DRILL.

Specification of Letters Patent. Patented Dee. 13, 1910. Application aiearebruar 28,.1910. SerialNo. 546,466.]

Corresponding and like parts are referred to in the following descri tion and indicated in all the views of t edrawings by the same reference characters.

. The rock drill forming the's ubject matter of ,the present invention COIIIPIISGS a cylinder 5 havin" fluid passages or ports 6 and 7 formed 1n the op )osite ends thereof and communicating wit a valve chamber 8. The valve chamber 8 is provided with a circumferential inlet port or chamber 9 and oppositely dis osed exhaust chambers or ports 10, which atter communicate with a common exhaust nipple or pipe 11 extending laterally from one side of the drill, as shown. The opposite ends of the valve chamber 8 are closed by removable plugs 12 and 13.having their inner ends reduced to form circumferential ports 14 and their outer ends provided withangular portions 15 so that the same may be conveniently grasped with a wrench or other suitable v tool to permit the removal of said plu Interposed between the plugs 12and l3 isa stationary plunger comprising 0 ositely disposed heads 16 and l'iconnected y an intermediate stem or rod 18, said stationary plunger extending through the valv'e 19. The valve19 is formed with a plurality of spaced

disks

20 and 21 the outer disks 20 being movable alternately over the exhaust 'ports'or chambers 10 and the central disk 21 being irnovable over the inlet plort 9 to control the admissionof fluid to t e 'opposite'ends of the cylinder. 5*, l

The valve 19 is provided with a-central bore to receive the connectin stem 18 and is also provided with opposltely disposed chambers or pockets 22 for the reception of the heads 16 and 17 of the stationary plun- 1n. the walls of the valve and communicating with the chambers 22, as shown. A. duct 25 is disposed on each side of thecylinder and formsa source of communication between tl e'interior of said cylinder and the ports 14 so that the fluid in the cylinder may be utilized forshifting the valve. I y

One end of the valve. chamber 8 is cutaway to form'a seat 26 for the reception of a T-eoupling or casing 27 to the nlpple 28of which is attached in any suitable nanu s ps a i 9- T i "Q. he p'l'ug' 13 is'providedjwithh y y StlE I HB O" which prbjeetsthrough anopening in the end of the, T-coupling or casing 27 .andis I displacement of the pawls and alsopto' pre provided with terminal threads for enga-gement wlth aclamping nut 31, there being a seat '3it'ormed in theend of the casing 27 and similar in construction to the seat 26 to prevent the entrance of dirt and other foreign matter to the interior of the casing.

The interior walls of the casing 27 are spaced from he stem 30 to form a circumferential chamber 33 which communicates by a passage 34 with the inlet-portor chamber9 to permit the air from the supply pipe 29'to enter said chamber 9. Thus it will .32 form in effect bearings for the casing 27' heseen that by releasing the nut 31 and rotating or partially rotating the T-coupling or casing 27-, the fluid supply pipe 29 may be positioned on either side of-the drill without. the necessity of detaching the supply pipe from the casing. a

It will here he noted that. the seatsQG and when the latter is rotated. the casing being locked inadjnst ,ed position by tightening the nut 31. T f g It will also be noted that the

plugs

12 and 13 are approximately. of the same diameter as the valvel9 so that by unscrewing the plugs, said valve 19 may be readily removed from its seat for the purpose of effecting any necessary repairs thereto. The plugs heads of the stationary plunger, but also permit the valve 19 -to reciprocate withinwhich is rifled to receive a correspondingly rifled bar 36, the latter being provided with an integral head 37, seated in the'rear end of the cylinder 5, as best shown in Figs. 2 and 5 of the drawings. The head 37 is provided with a series of substantially spherical sockets 38in which are .pivotally mounted locking pawls 39 adapted to engage corresponding-ratchet teeth 40 formed in the inner face of a retainingring 41. 37 is also provided with intersecting openings 42 in which are mounted sliding plungers 43, the... ends of said plungcrs being adapted tobear against the adjacent. edges of the pawls.;39 for the purpose of forcing said pawls in contact with the teeth 40. The plungers 43 are each preferably formed in two sections having sockets or chambers formed therein for the reception of. coil springs 4-4 so that the pawls will normally and yieldably bear against the ratchet teeth 4-0. l

(lonnni micating with each socket 38 is a recess 4 adapted to receive the adjacent pawl 39. the'end wall of each recess being provided with a. curved bearing surface 46 for engagementwith the ad accnt end of the pawl, thus to assist in preventing accideiltal The head "12 and 13 not only form abutments for the vent undue wear on the same It will here be noted that two of the pawls are in engagement with the adjacent teeth thereto for the purpose of turning the drill so or other cutting tool. On the working" stroke of the piston, the pawls 89 will mo e. the distance of a half tooth and rotate the a rifle bar slightly so as to allow the piston 35 to travel in a straight path. 35

The member 37 is retained within the cylinder 5 by means of alwztsher -17 and a head to. the former being provided with astopshoulder and the latter being provided with suitable cushioning springs 49 extending go across the outer surface of" the head, asjbest shown in Figs. 1 and-2- of the drawings.

Auxiliary ports or chambers 50 are disposed on opposite'sides of the inlet port 9 so as to permit the entrance of fluid through the

ports

23 and 24 to the chambers '22 Of the valve. e H v I Thus it will. be seen that on t'he rearward or return stroke ofthc piston the air or other fluid in the front end of thecylinder will "flow through the adjacent duct to ,the'po'rt 1-1 at the rear end of the valve 19. so as to shift said valve and permit the air fronrthe iuiet port 9 to tlmvth'rough' the port? to the rear end ,of the piston. \Vhen 1 the valve 19 is moved to the position shown in Fig. 1 o't' the dra\vings,"a portion of the air from the main supply pipe will enter the rear chamlfer 22 through the

ports

50 and 24 so as to hold the valve to its seat 1 and prevent rear ard movement thereof during the vorkingfstroke of the piston. Vherr the valve is --in the position above referred to, theair from the port 14 at the rear of the valve will passfth-rough the "duct v 1: 25 to the front end of the cylinder and the air in the front end of said cylinderlivilll be exhausted through the passage" 6 and chamhers 50 and 10 to .the common exhaust pipe or nipple '11.. As soon as the duct/leading 129 to the port H- at-the'front' of'the cylinder is uncovered. the fluid at therear end of said.

cylinder will flow throughsaid ductla l shift the valve 19 in the opposite directionso as to'open up communimition between the inlet port 9 and the front end of the cylinder andpermit the discharge of-fluid front-the rear end of the cylinder through the ports" "I 50 and lt to the exhaust-,lt, atpo'rtion of the fluid from the inlet port at? the same 139 with a valve chamber, a piston operating.

within the cylinder, removable plugs forming closures for the opposite ends of said chamber, a stationary plunger arranged within the valve chamber and having its opposite ends Bearing against the inner faces of the plugs, a valve mounted for reciprocation on the plunger for controlling the admission of fluid to the opposite ends of the cylinder, a duct leading from each end of the valve to the cylinderto permit the passage of fluid for reciprohating said valve, and fluid pressure means for preventing rearward movement of the valve during a partof each stroke.

2. A rock drill, including a cylinder havinlet andexhaust ports and provided with a valve chamber, a piston operating within the cylinder, removable plugs forming closures for the opposite ends of the valve chamber, one of which is provided with a stem, a casing spaced from thestem to form a chamber communicating with the inlet port and provided with means for attachment to a source of fluid supply. a plunger interposed between and bearing against the plugs, a valve mounted for recipchamber, one of said plugs being provided.

rocation on the plunger for controlling the '40 admission'of fluid to the opposite ends of the cylinder, and a duct leading from each end of the valve to the cylinder to permit the passage of fluid for reciprocating said valve.

3. A rock drill including a cylinder having inlet and exhaust ports and provided with a valve chamber, a piston operating within the cylinder, solid plugs forming closures for the oppositeenc s of the valve with a threaded rod,"a rotary casing surrounding the rod and spaced from the latter to form a amber communicating with the inlet port nd a source of fluid supply, a plunger interposed between and bearing against the plugs, a' valve mounted for reciprocation on the plunger for controlling the admission of fluid to the opposite ends of the cylinder, and a .nut engaging the threaded end of the rod and bearing against the casing for securing the latter in adjusted position.

4. A rock drill including a cylinder having inlet and exhaust ports and provided with a valve chamber, a piston operating within the cylinder, removable plugs form-- ing closures for the opposite ends of the valve chamber, one of said'plugs being pro-:-

vided with a stem, a casing spaced from and surrounding the stem to form a chamber communicating with the inlet port and an" source of fluid supply, means carried b the stem and engaging the casing for ho ding plunger interposed between andbearing against the plugs, a valve mounted for reciprocation on the latter in adjusted position, a

the plunger for controlling the admission:- 1 of fluid to the opposite ends of the cyl1nder,

a duct extending from each end of the valve to the cylinder to permit thepassa e of fluid for reciprocating the valve, an pockets formed in the valve around the plunger and communicating with the fluid supply. for preventing rearward movement of the valve during a part of each stroke.

5. A rock drill including a cylinder having inlet andexhaust ports and provided with a valve chamber, a piston operating within the cylinder, removable plugs forming-closures for the opposite ends of the valve chamber, a stationary rod arranged within the valve chamber and having its opposite ends provided with enlarged heads bearing against the inner faces of the plu s, a valve mounted for reci rocation on t e plunger for controlling t e admission of.

6. A rock drill including a cylinder having inlet and exhaust ports and provided.

with a valve chamber, a piston operating within the cylinder, removable plugs forming closures for the opposite ends 0 the va v e chamber and provided with inner flat bearing faces, a stationary plunger arranged within the valve chamber and having its opposite ends bearing against the flat faces of the plugs, a valve mounted for reciprocation on the stationary plunger for controlling the admission of fluid to the opposite ends of the cylinder, a duct extending from each end of the valve to the interior of the cylinder for reciprocating the valve, and fluid pr essure means for preventing rearward movement of the valve during a part of each stroke. I

7. A rock drill including a cylinder hav ing inlet and exhaust ports and provided with a'valve chamber, a piston operating within the cylinder, removable plugs forming closures for the'opposite ends of the valve chamber and provided with circumthe admission of fluid to the opposite ends- 10 reciprocating the valve, there being pockets sitely disposed heads bearing against the flat feces of the plugs a valve mounted for reciprocation on the plunger for controlling of the cylinder, and a duct extending from each end of the valve to the interior of said cylinder to permit the passagevof fluid for formed in the valve to receive the "heads of the plunger and provided with, ports to ermit the admission of'fluid to said chamrs ,for the purpose of preventing rearward )5 movement of the valve during a. part of each stroke. v In testimony whereof I aifix my slgnature in presence of two witnesses.

CHARLES A. H'ULTQUIST; in. 8.]

Witnesses: J. E. MALDONODO,

I C. HIGH;