US2280007A

US2280007A - Safety guard for pneumatic chipping hammers and the like

Info

Publication number: US2280007A
Application number: US323615A
Authority: US
Inventors: Plateck Stephen
Original assignee: Individual
Current assignee: Individual
Priority date: 1940-03-12
Filing date: 1940-03-12
Publication date: 1942-04-14
Anticipated expiration: 1959-04-14

Description

SAFETY GUARD FOR PNEUMATIC CHIPPING HAMMERS AND THE'LIKE Filed March 12, 1940 1720622322": 7 0 TPHN PLATECK, 2/ 20 Z,

i use 01' workmen It has been were intended.

thehammerr a; i i i It is an objectofthe present invention to provide a simple and inexpensivesajfety guard which will encourage its use and protect other workmen Pa niJA r, 4, 1942 1 a 2380,0651) "I N l r p SAFETY GUARD non rnnuminocmrrmo it nammasannrnnnmaa w-eta. om

This invention relatestoa safety device and the like.

Heretoiore; operatorsofjpneumatic chipping hammers and thelikeusuallywore goggles to protect their eyes from injury,due to flying chips or other foreign particles; While goggles are satisfactoryand are a good protection mr the eyes, they do notprotect "theface andother parts particularlyto animproved safetyguard ior'thew opera-tingflchipping hammers and which, my invention may GClaims. cLjao -issy p M invention will be more apparent in the course or. the following specification and will be particularlypointed out in the appended claims. I

In the} accompanying drawing there is shown, for thepurpose of,illustration, one embodiment assume in practice.

In'thlsdrawing:l 1 i Figured is a side elevation of a pneumatic of the body of the operator from injury, nor

nearby workmenengaged in other duties. Also,

it is neoessary for the chipping hammer operators to wear goggles thegreater part ofthe day, and

after contlnuoususe over suoha longperiod of time.

directly to the body or barrelof the pneumatic hammer, but such guards areunsatisfactory in proposed to attach safety guards that thesupport for the guards is positioned too far fromthe" point of cutting and the guards are readily forced outof adjustment and from over the point of cuttingorchipping due to the vibration of i the hammer which is, of course, unsatisiaotory. Further, such guards 'attached to the hammer made thehammerjbulky and oftentimes interfered with the operation thereof, thereby of course defeated the purpose for which they According to thepresent invention, there is tending todiscouragetheir useentirely, which 3 provided animproved safety guard which is at alltimes maintained in position directly over the workpiece and thelcutting tool and, at the. same time, one which does not interfere with the cutting or chipping l perationj and the use of in the immediate vicinity aswellas the operator.

It is another objector the inventionto provide a safetyjguard for use with chipping hammers and the likewhich will deflect the chips or other foreignparticles downwardly, away from the work, immediately after they leave the sur face thereof, thereby eliminating the dangerof the chips piling upand obscuring the work.

It is a further objector the invention to pro vide a safety guard jwhich will permit a near; vision of the workingjtool and the work at allj times and, at the sametime, ,provide'aguard which iseflective in itsuse. a

Various other objects and advantages of this they become quite uncomfortable to thewearer 1 foreign particles struck up byworking toolwith which it is tobe used. There is disposed in the top of the deflecting portion 8 man is adapted toview the end of the working hammerin use, showingthe improved safetyguard offmy invention incorporated therewith and theuse thereof; l Flgure2 is an enlarged side elevation, partly in sectiomishowing my improved safety guards assembled on the shank of the cutting tool; Figure 3 is a plan view thereof; Figure 4 is a plan viewshowing a slight modification i thereof;

fFlgure fi is a side elevation similar to Figure 2, showing a modified form of safety guardof my invention; and, a

Figure 6 is a. plan view thereof.

Referring more particularly to the drawing, the preferred embodiment of the safety guard ofmmy" invention as shown in Figures 1 and 2 of the drawing, comprises a longitudinally extending inherently resilientfframe member 2 which is preferably made of spring steel oi-l any other suitable resilient sheet metal. The inner end 3 of the frame 2 is securely attached to a pliableannular member, preferably a short length of rubber hose l,by-mearis of therivet Sex in any other suitable manner. The pliable member or rubber hose 4 should have an interior diameter slightly less than the shank 6 of the working tool I with which it is tobe used asit is adapted to flt tightly therearound: Also, it is preferable that the innerend 3 of the frame 2 be disposed within the annular memberor length of rubber hose betweenfthe; same and the shank 6 of the working tooljso astoyaid in supporting the same. A-por'- non; of thefram 2 adjacent th inner end thereofis bent downwardly on each side thereof as at 8, soas to fit partially around the outer surface of the shank of the working toolso as to aid in preventing the frame 2 from twisting or turning relative thereto. 1

i There is arranged "toward the outer end of the frame 2, a relativelywide deflecting portion 8 of such width as to properly deflect the chips, or the particular substantially centrallyfthereof, a longitudinally extending opening Iii through which the workin the deflecting portion 9 of the frame 2. The wire mesh may be welded or otherwise suitably attached to the frame with the mesh of the wire being small enough to prevent the chips and other pieces of foreign particles from passing therethrough. A one-fourth inch wire mesh has been found to be satisfactory for most purposes as it permits a clear vision therethrough of the end of the working tool and the workpiece and, at the same time, properly deflects the chips so as to protect the operator. A guard of such construction is preferable for use when extremely small chips are thrown off by the working tool.

In Figures 5 and 6 of the drawing, there is' shown another modification of the safety guard of the present invention. In this construction, the frame member is made preferably of a piece of inherently resilient wire I 5 properly bent upon itself, and formed into the shape as shown in Figure 6, or in any other suitable shape. The inner ends l6 of the wire are securely attached as before to an annular pliable member preferably a length of rubber hosing Il. The ends l6 of the wire preferably extend within the length of rubber hosing between the same and the shank 6 of the working tool 1, as in the preferred embodiment, and the ends are preferably bent upwardly as at [8 so as to be disposed in holes l9 arranged through the wall of the rubber hose so as to prevent displacement of the frame.

The outer free end of the wire is bent backwardly upon itself so as to provide a relatively wide loop portion 20. There is arranged over the loop portion 20 preferably a wire mesh 2| so as to provide a deflecting shield portion on the end of the frame. The outer free end of the loop portion 20 is preferably bent outwardly and downwardly as at 22 which is adapted to rest upon the surface of the workpiece during the chipping operation.

In operation, the pliable annular member or I rubber hose 4 is slipped over the endof the working tool or chipping chisel with which the guard is to be used and properly positioned on the shank thereof so that the end of the working tool or chisel and the workpiece can be properly viewed through the opening in the same. In starting the working tool or chisel, it is usually positioned at a small angle with the vertical and in this position, the extreme outer free end of the shield, namely, the portion l3 as shown in the embodiment of Figures 1 through 4 of the drawing, and the portion 22 of.-the embodiment as shown in Figures 5 and 6 of the drawing, ex-

tends a slight distance beyond the end of the cutting tool and point of cutting and will bear upon the surface of the workpiece. As the cutting operation progresses, the working tool of course is lowered and approaches the horizontal and the outer free end of the deflecting shield or guardis still maintained in contact with the surface of the workpiece due to the inherently resilient characteristics of the frame. That is,

the guard. is always maintained in its proper position over the point of cutting no matter at what angle the cutting tool is positioned, due to the resiliency of the frame. Thus, it will be seen that the chips or other foreign particles of metal strike the guard which obstructs the path with sufficient resistance to neutralize their outward force, and deflects them downwardly and outwardly, thus eliminating the same from bein deflected toward the body of the operator or towards other workmen in'the immediate vicinity of the cutting or chipping operation.

While I have shown and described an embodiment of my invention and several modifications thereof, it will be understood that these embodiments are merely for the purpose of illustration and description, and that various other forms may be devised within the scope of my invention, as defined in the appended claims.

I claim:

1. A safety guard for the use of workmen operating pneumatic chipping hammers and the like comprising a longitudinally extending inherently resilient deflecting shield member adapted to be positioned over the working tool of the hammer, a pliable annular member to which the inner end of said shield is securely attached, said annular member. adapted to fit tightly around the shank of the working tool, and an outwardly and downwardly extending portion arranged on the outer free end of said shield which is adapted to rest upon the workpiece during the working of the tool and to be held thereagainst by the resilient action of said shield member, said outwardly and downwardly extending portion being constructed and arranged sothat the same will rest upon the workpiece at a point beyond the working edge of the tool when the tool is substantially parallel to the surface of the workpiece and at all times when the tool is in use.

2. A safety guard for the use of workmen operating pneumatic chipping hammers and the like comprising a longitudinally extending inherently resilient deflecting shield member, said shield having an opening arranged therethrough in the top thereof adjacent its outer end so as to enable the workman to view the end of the working tool and the workpiece therethrough, a pliable annular rubber member to which the inner end of said shield is securely attached. said annular rubber member adapted to fit tightly around the shank of the working tool, and an outwardly and downwardly extending portion arranged on the outer free end of said shield member which is adapted to rest upon the workpiece during the working of the tool and to be held thereagainst by the resilient action of said shield member, said outwardly and downwardly extending portion being constructed and arranged so that the same will rest upon the workpiece at a point beyond the working edge of the tool when the tool is substantially parallel to the surface of the workpiece and at all times when the tool is in use.

3. A safety guard for the use of workmen operating pneumatic chipping hammers and the like, comprising a longitudinally extending inherently resilient frame member formed of wire, a wire mesh securely arranged on said wire frame member adjacent the outer free end thereof so as to provide a shield for deflecting foreign particles caused by the chipping operation and to enable the workman to view the end of the working tool and the workpiece therethrough, a pliable annular rubber member to which the inner end of said Wire frame is securely attached, said annular like rubber member adapted to m; tightly around the shank of the working tool, and an outwardly land downwardly extending portion arranged on the extreme outer free end of saidwire frame member which is adapted to restupon the work piece duringv the workingfot the i tool and to be held thereagalnst by the resilient action of said frame member, said outwardly and downwardly extendingportionbeing constructed and arranged so that the same will restsupon the workpiece at a a a point beyond the working edgetoi the tool when i the tool-is substantiailyparallel to the surlace of i outwardly anddownwardly extending portionbethe workpiece andfat all times when the tool is in 4. Awsafety guardior chipping 1 tools and the comprising a* longitudinally extending in- "of the tool andthe workpiece therethrough, and

a resilient rubber ring memberjhaving anxinner ,diameter slightlyfiless than jthevouterdiameteroi the I shank of thetool around which lt ls adapted fttotightly fit, the innerend of said shield-member Jdisposedwithin the rubber ringmernber to which an adapted to be disposed 1 next to the shankfoi the tool so astobe securely v V supported with'ithefouter free end oflsaid shield member adapted to 'rest uponthe workpiece dura ing t'neuse thereoi andto be held thereagainst i a at all timesdueto the resiliency olthe'same.

h w ss q -e et like comprising a longitudinally extending.inner-k it is securely attached 5. A safety guard for h'erently resilientdeflecting shieldmember adapta to be positioned over a working tool, said shield member made from a piece or inherently l resilientjsheetmaterial means arranged in theouter free end or said shieldtort viewing the end ently resilient deflecting shield member adapted to be positioned over a, working tool, mean arranged in the outer end of saidshield for viewing the end of the tool and the workpiece therethrough, a resilient rubber ring member to which i the inner end of said shield 3 said ring member adapted to fit snugly and completely around the shank of the tool, and an outi wardly and downwardly extending portion aris securely attached,

ranged on the outer free end or said shield, said ing constructed and arranged so that the same will rest upon the workpiece at a point beyond the working edge 0! the tool when the tool is substantially parallel to piece and at all. times when the tool is in use.

6, A safety guard for chipping tools and the "likeoomprislng a longitudinally extending inherlently resilient deflecting shield member adapted 20 to be positioned over working. tool, means ar t ranged in the outer end 01' saidshield for viewing the end 01 the tool and jpletely around the shank wardly and downwardly extending portion arranged on the outeri'ree end or said shield which 1s adaptedto restupon the workpiece at all times,

the workpiece therethrough. a resilient rubber ring member to which the inner end of said shieldis securely attached to flt snugly and comot-the tool. ano'ut said ring member adapted and means carried bysaid shield which is adapted to cooperate witnthe'fworking tool for preventing sidewise tothe tooll' i 3 movement of the shield relative the surface of the work-