US1050951A

US1050951A - Pneumatic hammer.

Info

Publication number: US1050951A
Application number: US72447512A
Authority: US
Inventors: Vilhelm Philip Kessel
Original assignee: MIOLNIR ROCK DRILL Co
Current assignee: MIOLNIR ROCK DRILL Co
Priority date: 1912-10-07
Filing date: 1912-10-07
Publication date: 1913-01-21
Anticipated expiration: 1930-01-21

Description

V. P. KESSEL. PNEUMATIO HAMMER.

` Arruonlon funn ouin-v. 1m.

Patented Jan. 21, 1913.

UNITED STATES PaTnNT orme-.n

vI'LHnLM PHILIP KESSEL, oF'saN mNo'Isco, CALIFORNIA AssIGnoR To MIoLNIR nook DRILL COMPANY, or SAN' FRANCISCO, cA'LIFoRNIA, a coPABTNnRsHIP.

PNEUMATIC Haumann.

Speciiicaton of Letters'latent.

Application med 'october 7. 1912. 'serial im *721,1125. .l

`which. t-he following-is a specification.

, vlvlvinvention relates to the art of pneu-4 matic hammers for use in rock drilling ap'- parat'us, riveting apparatus, pile driving apparatus, drop hammer forging apparatus,

and the like, and the invention primarily has for its object to simplifv and reduce the expense of construction of such apparatus a-nd to' increase the strength of hammerl and eiiciency of operation.4`

In its general nature the invention comprises a support in which the drill or riveting tool. as the case may be. is adapted to be held and which carries the usual handle for the operator. The support also serves to contain the reciprocating hammer cylinder in lwhich the'stationary piston operates.

In its morel subordinate nature the invention includes those :novel details of construction, combination and ar angement of parts.

all of which 'willbe first fully described, and y then be 'specifically point-ed out in the appended claims,` reference being had to the accompanying drawing, in which yFigure l is avertical longitudinal section l of the invention as applied for use on rock drills, the hammer cylinder being positioned d near the' rearward limit of its stroke. Fig: 2 is adetail section similar to Fig. 1 sh0w ing the hammer cylinder in its impacting position. Fig. 8 is alongitudinal Sectional perspective of the hammer cylinder. Figs. 4 and 5 are cross sections on the lines 3 3 and 4 4 respectively of Figs. 1 and 2 respectively.

ln the drawings in which like numerals designate like parts in all the figures. 1 represents the support which is in the nature of an elongated tubular casing whose front end carries the chuck 2. in which the tool 3 is held. The support l has oppositelv disposed openings 4. which form thc exhaust outlets through the casing 1. 'The easing l also is provided with oppositelv disposed grooves 5 in which the feathers 6. of the' Vhammer cylinder 7 ride during the reciprocations ot the .hammer evliiider. At its rear end the casing;r 1 is Hanged, as at 8, and counas 'atl 9. to receive the cap 10 which has-a -dang-fe 11 v'torest in the c'ounterbore. 9|

and a ian; 12 to abut the flange 8. The

fratenveuaan. 21, 1913.

cap-10 is heldin place-(by the screws 13 and check nuts 14 of the handle arms 15 which carry the-hand hold 16.. vThe hammer 4cvl- .with .the ports -21 and22 respectively ot the piston 23. The rear end of the cylinder 7 is closed b'ya threaded plug 21 which is bored to'permit'passage of the piston rod 25 which is of less diameter than the diameter of the bore 18, as best shown in Figs.

1 'and' 2 of the drawing. The piston rod 25 also extends through the cap 10 into which it is threaded, as at 26, and held by jam vnuts 27. The source -of working agent supplv is connected bv a suitable connection 2S and 29 with the piston rod 25, 1t being: un-

derstood that the rod 25 has a passage 30r from its entrant end to the ports 22 and 21' res ectivelv.

etween the

connterbores

19 and 20 and adjacent thereto, the hammer cylinder 7 has exhaust ports 31 and 32, the front port 81 Serving to exhaust the working agent between the piston and the head 17, while.

the rear port 32 serves to exhaust the working agent between the piston 23 and the plug 24. The plug 24 has lugs 33 which also ride in the slots 5and thus keep the plug from Y unscrewing and hold it always in proper position with regard tothe hammer cylinder 7.

In operation working-agent (steam, air. or other iiui'gl) is admitted into the duet 30 and ows to one or the other of the

ports

21 or 22 aecordinglvas such ports are. in coni- I'nunication with the counterbore 19 or the counterbore 20. Assume the parts to be as shown in Fig. 1, the working agent passing through the duct 30 and port 21 will einer the cylinder '7 between the head1? and the piston 23. thus exerting its expansive force to drive the cylinder 7 forwardly toward the position shown in 2. The morena-ni or the piston 7 under the induence of rho wol-ltVA ing agent. occurs until the pont 21 covered by thc cylinder i and the exhaust port H1 is uneoverei'l during the forward movement of the cylinder lily the inne the port 31 is uncovered the expansive action o'the working agent will have spent itself leaving 60 inder' hasa solid impacting head 17 at Y little or no pressure il. advance oli the piston 23. As soon as the piston. :23 has been passed by the cylinder' "7 to close the port 3Q, the residual contents otythe cylinder 7 hetween the piston 23 and the plug 2d will bet come compressed slightly to act as a cushion der 'l' continue so long as Working agent is admitted into the duct nl), as will. be readily understood by reference to the drawing.

will be noted that by my Construction, the parts are simplified tothe greatest prael'icable degree and they are'made light and strong. But little machining is required and special packing devices are unnecessary to prevent Athe escape of the Working Huid. to the hindrance of the Working of the ap paratus.

From the foregoing description, taken in connection With the accompanying drawing, it is thought the complete construction op eration and adi/nntages of the invention Will he apparent to those skilled in the art.

lVhat l claim is:`-

l. A supporting casing opened at one end, a hammer cylinder longitudinally movable in said casing, said casing having at least one longitudinal groove, and said hammer cylinder having at least one longitudinal eal'l'ler or rib to operate `in said groove and thereby hold said cylinder from turning on its axis, a piston held Within said cylinder, a piston rod projecting into said cylinder and casing,v means rigidly 'holding said rod to said casing, said rod having a working agent passage from ,lits outer end to said piston, said piston having two distinct sets of radial ports in communication with said longitudinal passage ofthe `piston rod, said hammer v cylinder having grooves coperating with said radial ports,isaid hammer cylinder having two distinct exhaust ports controlled by said piston, said casing having openings to receive the discharge from said exhaust ports, substantially as shown and described.

il. A supporting casing, a hammer cylinder longitudinally movable therein, a piston within said cylinder, a piston rod projecting into saidcylinder and casing, means rigidly holding said rod to said casing, said piston and cylinder having coperative ports and grooves respectively, and means for leading 'Working agent through said piston rod to said ports, said cylinder having exhaust ports controlled by said piston, said casing having exhaust openings registering with said exhaust ports, and means for holding said cylinder from, turning to thereby maintain said exhaust ports in alineinent with said casing openings regardless of the position oi said hammer cylinder.

A supporting casing open at one end, a hammer cylinder operable in said casing and, insertible through said open end, said casing having at least one longitudinal groove, and said hammercylinder having at least one feather to coperate with said groove, said hammer cylinder being reciprocable in said casing, a cap for closing the open end of said casing, a piston rod secured to said cap and projecting into said casing and into 'said hammer cylinder, a piston Within said hammer cylinder on said piston. rod, said hammer cylinder having an open end through which said piston rod projects, a plug threaded into said open end of saidv hammer cylinder, said plug having a lug to enter said casing groove, said piston rod having a hollow passage from its outer end to said piston, said piston having ports and said hammer cylinder having counterbores or grooves to coperate with said ports for admitting the Working agent to either end of said hammer cylinder, said hammer cylinder having exhaust port-s controlled by said piston, and said casing having exhaust openings coipe ating with said exhaust ports, substantially as shown and described.

VILHELM PHILIP KESSEL.

WTit-nesses KATHRYN KESSEL, A. JORGENSEN.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents`