US1201986A - Pneumatic rivet-breaker. - Google Patents

Description

S. J. SEDINGER.

PNEUMATIC RIVET BREAKER..

` APPLICATION FILED MAI/I5, I9Is.

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ruf-ff Patented OCI. 17,1916.

`on the line 3 3 of Fig. 1,

` plunger is to be returned toward thecylin-` nfrnn'r ormoni.

arena-warn a'. snnING-na, or INDIANAroms, INDIANA, AssIGNon or ONE-HALF 'ro e enovnn nanna, or INDiANAroLIs, INDIANA.

rNEur/ m'rro River-Bananas.

specification of Letters Patent.

Patented Oct. 17, 1916.

Application led May 1,5, 1916. Serial No. 97,608.

To all 'whom it may concern:

Be it known that I, SToNnwALL J. SED- inenn, a citizen of the United States, residing at. indianapolis, Marion cunty, and State of Indiana, have invented and discovered' certain ynew and useful Improvements -in- Pneumatic lRivet-Pmeakers,l of

which the followingis a specification. 0

My invention relates to pne'umatic rivet breakers, and its object is to provide a tool of this character adapted to obtain a maximum efficiency of power from the com-- pressed Aair and to enable the cost of construction of such a tool to be greatlylesscned, and to enable the weight of the same to be decreased as compared with previous devices of this character, and also to provide means whereby the parts may be readily assembled.

With these objects in view,my invention is embodied in preferable form in the construction and arrangement hereinafter described and illustrated in the accompanying drawings.

ln these drawings, Figure 1 is a longitudinal sectional view of .the improved tool; Fig. 2, an end View of and Figs. 3, 4; and 5, cross sectional views illustrating the controlling valve in three positions, viz:- that given when the plunger is to be driven toward the chisel; that given it when it is to be neutral; and that given it when the der-head.

Referring to the drawings, 1 designates the head of the tool, which head consists of a hollow cylindricalrbody having a central hollow valve chamber therein, in which is adapted to be seated a cylindrical or conical rotatable air-controlling valve 2'. This valve is retained in place within the chamber by means of ahead plate 3 which .is screwed to the head by means of screws Ll. A screw bolt is attached to the valve and operates freely through the head plate and is provided atv its outer end with a projecting handle 6 whereby the valve is adaptedto be manually operated to alternately effect the forward driving stroke of the plunger upon the cuttingchisel and the return movenient of the plunger, or to seat the valve in neutral position.

In order to limit the movement of the valve and determine the registry of the ports the head of the same;

thereof witheither the ports that establish vthe forward flow of the'power medium o r the return flow thereof, a stop pin 7 is'provided in the fixed head plate, lwhich. 'pin enters an arcuate slot 8 formed inthe outer face of the valve.

The valveis of such construction as to permit a comparatively unimpeded flow of the' compressed air therethrough, thus decreasing frictionand avoiding a loss of power in operating the tool.' To this end,

the said valve Ahas an elongated circular port or passageway -9 extending through the wall at right angles Vto the axis -of the valve and communicating at the center of the valve with a longitudinal, elongated port or passageway 10, constituting the central bore of j thevalve 'which is adapted to communicate at its lnner end with an aperture 11 leading through the inner cross 'wall of the valvechamber head. The valve also has a cutaway segmental portion 12 constituting a flatted port 'which is adapted to' establish y y communication ciroumferentially of the valve between two of the ports of the head when turned to certain positions.

The valve head is provided with a series of four ports formed by horizontal passageways extending through the wall of the headat right angles tothe axis of the'valve and having the centers of said ports lying in the same plane. Referring specifically to these ports, A13-is the inlet port which is adapted to have communication with a pipe 14 communicating with a hose 15 which leads to a suitable source of compressed air. 16 is anexhaust port; 17 is also an exhaust port communicating with an exhaust pipe 18, and 19 is a port adapted to communicate with the upper end of a pipe section 20, which communicatesby a hose -21- with the lower end of the tool .in order to :supply compressed air for thepurpose of returning the operating plunger to normal position after each stroke. hose terminates in a pipesection 22'and this lower section is screw threaded into an opening formed in the side wall' of a 'nose piece 23 which consists of a hollow shell and which is provided with a surface port '24 leading from said opening and adapted to admit the compressedair-to the lower end of the tool.

A hollow, longitudinaltube 25 fits be- The lower end of the tween the head v1 and the shell 23 consti tut 1110 ying the nose piece, and this tube is adapted to receive the compressed air at either end thereof. In this'tube is mounted a reciprocal air-operated stitute the1 driving member -for |a cutting chisel 27, the shank 28 of which is freely mounted. withnathe body of. the Shell of thel nose piecey and.l which chisel is adapted to be supported by operators while the other'operator manipulates the valve so as to direct the air currentito effect-the driving and returnl movements ofthe plunger. A clamping plate 29 bears against the nose piece, and the head of the valveand the nose piece are held together and the tube held clamped between said parts by means of longitudinally extending bolts 30.

Itwill be seen that the admission port 24 leadingacross the inner'face of the body of lthe nose piece 23 is below the level of said face and also beyond the end ofthe plunger unnecessary inclosing tube 25 whereby it'is form a port or opening through the tube itself, which-arrangement dispenses with the necessity of bringing two apertures into jregistry when' openings through both the nose piece and the tube are formed, as has n y' heretofore been the practice, and the estabf element of considerable difficulty in adjust-` lishment of. which registry is frequently an ment.

The operation' of the tool is as follows:

Assuming that it is. desired to drive -the the chisel for a cutting operation, the valve plunger forward so as to force it against is turned to the position indicated in Fig.

I .3, wherein the inlet port 13 leading vfrom the source of compressed 'air will be in registry with the horizontal port 9 ,of the valve, whereby the power medium is directed downwardly through the opening 10 in the valve head and against the upper end of the plunger 26, forcing the latter down against the end of the chisel to perform the cutting operation. In this traverse of the air, it will be seen that it is compelled to make only one angular turn, owing to the central passage and single admission port the ports in the nose through the valve. In the downward descent of the plunger, the air in the tube ahead of the same will be forced out through piete into the connecting pipe 21 and thence through port 19 of the valve head and thence out through port.17 to the exhaust pipe 18 by means of the flatted port 12 on the periphery of the valve, which port will be brought into registry with said ports 19 and 17 whenever Vthe valve ris turned to position to admit the air for the forward stroke. To return the plunger to its upper or outer position, ready for another cutting stroke, has charge of the control the valve to the position the operator who of the tool turns indicated in vFig.

plunger26 adapted to conthe hand of onepof the.

.two vair inlet in the same v head at right one of said inlet ports having communica- 5, .whereupon the air will be admitted through the port 18 and thence by means of theV Hatted port on Vthe valve through the port 19 to the connecting pipe 21 which conveys the air to the other end of the tube and serves to drive the plunger toward the valve head. In this-movement the air bethe valve andV through the'main longitudinal passage 10 of the valve and 'out through the horizontal ports 9 a'nd 16;

y In F position with blank spaces thereof covering the main inlet and outlet ports.

.tween the inner end of the plunger and.A

head is exhausted. out through the opening -11 leading through the qvalve head ig. 4, the valve is shown in neutral" Having thus described my invention,

what I claim is:

1. A pneumatic rivet breaker having an air receiving tube, a nose piece and a c lindrical head between whichsaid tube is eld, a cylindrical rotatable valve'in said head having a passageway, lthe axisl of which extends longitudinally of the axis of the tube and communicates with a port in the end of the tube, said valve having also a port at right angles to the axis of the tube and meeting the longitudinal passageway of the valve and adapted tocommunicate with ports leading directly through the ead at right angles to the axis'thereof, and

an o erating handle for the valve lying -beyon the end of the head in a plane at right of the valve and head.

angles to the axis manually operated pneu- 2. A portable,

matic rivet breaker having an air receiving tube, a reciprocable plungerv therein, a cutting chisel operable by the plunger, air admittingmeans at both ends of the tube, a cylindrical valve head at one end of the tube and in longitudinal continuation thereof, and having two exhaust ports and ports arranged substantially circle extending through the angles to the axis of the tube,

tion with a source of compressed air and the other having communication with the opposite end of said tube, and a-controlling valve having a central longitudinal bore therein having continuous communication through the valve head with said tube and having a port extending at right angles to said bore throughv the wall of the valve and communicating with said bore passageway,

plane at right angles toV I, Leonesa 3. A pneumatic rivet breaker having air receiving tube, a reciprocable plunger therein, a cutting chisel operable by theV through the wall thereof at right angles to the axis of the valve, which ports have their centers in substantially the same plane, a pipe connecting one of said ports and the lower end of the tube,a source of compressed air supply, means of connection between said source and one of said ports in the valve head, two of suchports constituting exhaust. ports, said4 valves having a central longitudinal passageway adapted to continuously register withA the central opening in the valve head and' having a port leading through its wall at right angles to its axis, and communicating with sald central passagewa adapte to register with two o and also having a peri heral port the valve head ports and means for determining the position of the .valve to direct the air to either give theforward driving stroke to the gliinger or to return the same toward the cad l 4. A pneumatic rivet breaker having an air receiving tube, a cylindrical nose iece and a valve head having sockets in w ich the opposite ends of said tube fit and are supported, means for clamping the head and nose piece together, said nose piece having a port beyond the adjacent end of the tube leading through the socket walland an air conveying pipe connecting a port in said valve h ead and said port 1n the nose piece.,

Inwitness whereof, I yhave hereunto set my hand and seal at lndianapolis, Indiana, this 13th day of May, A. D. nineteen hundred and sixteen.

STONWLL J. SEDlNGER. [1.58.] Witnesses: v

H. P. Doom'rrm, GnovER HANNA.

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