US2779367A - Chisel guard - Google Patents

Description

Jan. 29, 1957 c. H. FORBES SEL GUARD CHI Filed March 14, 1955 w w 6 m 2 F A 2 6 A .m. x F

. m1 1 5M w! A I rm 1 0V, 4 FN E (6 .1 M H e m g Pu Y B M Jan. 29, 1957 c. H. FORBES 2,779,367

CHISEL GUARD Filed March 14, 1955 2 Sheets-Sheet 2 Clarence H. Forbes INVEX TOR.

WW 5m CHISEL GUARD Clarence H. Forbes, Salt Lake City, Utah Application March 14, 1955, Serial No. 494,153 8 Claims. (Cl. 145-24 This invention relates generally to a chisel guard and more specifically provides new and useful improvements over the chisel guard illustrated in my copending application, Serial No. 457,435, filed September 2t, 1954.

An object of the present invention is to provide a chisel guard for protection of the cutting edge thereof when the chisel is not in use. I

Another object of the present invention is to provide a chisel guard that may be easily attached to a chisel and securely retained thereon for protecting the chisel when not in use and to protect the cutting edge thereof from contact with other objects, such as tools or the like, when the chisel may be placed inla tool box or the like.

A further object of the present invention is to provide a chisel guard in the form of a channel-shaped member having an insert adjacent one end thtereof for receiving the cutting edge of the chisel in a notch therein together with means for securely locking the chisel guard on the chisel.

Yet another important object of the present invention is to provide a chisel guard in conformance with the preceding objects in which the insert for receiving the cutting or sharpened edge of the chisel is adjustably mounted in the channel-shaped member for receiving various types and lengths of chisels.

Still another important feature of the present invention is its simplicity of construction, utility with various types and sizes of chisels, ease of attachment and detachment, its adaptation for its specific purposes and its relatively inexpensive manufacturing costs.

These together with other objects and advantages which will become subsequently apparent reside in the details of construction and operation as more fullyhereinafter described and claimed, reference being had to the accompanying drawings forming a part hereof, wherein like numerals refer to like parts throughout, and in which:

Figure 1 is a perspective view of a chisel with the chisel guard of the present invention positioned thereon;

Figure 2 is an exploded group perspective showing the elements of the chisel guard of the present invention and showing the relationship thereof;

Figure 3 is a longitudinal, vertical sectional view taken substantially upon a plane passing along section line 3-3 of Figure 1 showing the construction of the chisel guard and the relationship ofthe chisel thereto;

Figure 4 is a transverse, vertical sectional view of the chisel guard of the present invention with the chisel omitted therefrom and showing the entrance of the V-shaped notch for receiving the chisel;

Figure 5 is a perspective view with portions of the chisel guard being broken away showing a modified form of insert wherein the chisel guard may be adapted to smaller chisels;

Figure 6 is alongitudinal, vertical sectional view taken substantially upon a plane passing along, section line 6-6 of Figure 5 showing the construction of the modified form of chisel guard; t

Figure 7 is a perspective view similar to Figure 1 showing a modified form of chisel guard of the present invention;

Figure 8 is a transverse, vertical sectional view taken substantially upon a plane passing along section line "nited States Patent 0 2,779,367 Patented Jan. 29, 1957 8-8 of Figure 7 showing the details of construction thereof;

Figure 9 is a perspective view showing another modified form of chisel guard of the present invention;

Figure 10 is a transverse, vertical sectional view taken substantially upon a plane passing along section line Ill-10 of Figure 9 showing the construction of the sliding plate mounted on the channel-shaped member;

Figure 11 is a transverse, vertical sectional view taken substantially upon a plane passing along section line 11-11 of Figure 9 showing the details of the end construction of the channel-shaped member forming the chisel guard;

Figure 12 is a perspective view showing a modified form of chisel wherein smaller chisels may be utilized in conjunction with the various chisel guards; and

Figure 13 is a perspective view of a modified form of insert for receiving various sizes of chisels.

Referring now specifically to the drawings, it will be seen that the numeral 10 generally designates the chisel guard of the present inventiontfor use in conjunction with a chisel generally designated by the numeral 12 and including a handle 14, a shank 16, a blade 18 and a cutting edge or sharpened end 20 remote from the handle 14.

The chisel guard 10 generally includes an elongated channel-shaped member 22 having side flanges 24 and a central bight portion 26. The bight portion 26 is provided with an elongated slot 28 for receiving: a screw fastener 39 in longitudinally adjusted position for securing an insert 32 which may be constructed of wood or plastic or any other soft material which will receive and protect the cutting edge 20 of the chisel 12.. The insert is provided with an aperture 34 for receiving the fastener 30 and one end of the insert 32 is provided with a V-shaped notch 36 extending inwardly, and the lower leg of the notch is provided with an inclined upper surface 38 which forms a guide for the insertion of the cutting edge 20 of the chisel 12 into the chisel guard It), and more specifically, into the V-shaped notch 36. The end of the channel-shaped member 22. remote from the insert 32 is provided with inturned side flanges 40 which terminate in concave edges 42 for engaging and gripping the shank 16 of the chisel 12. Due to the inherent resiliency of the material from which the channel-shaped member 22 is constructed, the flanges 40 will frictionally retain the chisel 12 within the channel-shaped member 22. Also, it will be understood that the angular relation of the inturned flanges 40 may be varied for receiving and clampingly gripping chisels having various sized shanks 16.

Slidably received on and encircling the channel member 22 is a closed loop or strap generally designated by the numeral 44 and including a central opening an equal in cross-sectional area to the cross-sectional area of the channel-shaped member 22 for longitudinal sliding move ment thereon. The loop 44 is closed by a reverse bent crimp 48 wherein the loop 44 may be positioned in encircling relation to the channel member 22 and the end of the blade 18 adjacent the shank 16 of the chisel The bight portion 26 of the channel member 22 is provided with a spring detent 50 adjacent the end thereof together with a depending portion 52 on the end thereot' for locating the loop 44 in relation to the channel member 22 for assuring that the loop 44 will retain the chisel 2 in the channel member 22, thereby retaining the chisel guard 10 on the chisel 12.

Figures 5 and 6 illustrate a modified form of insert 54 wherein the front edge thereof is provided with an inwar-dly extending bore 56 formed by side members 58 wherein the bore 56 will receive a chisel having a relatively small blade and cutting edge. The side members 58 form afour-"sided bore 56 for protecting the cutting edge of the chisel'on all sides. The insert 54 is also provided with a forwardly and outwardly extending lower leg 6% having an inclined upper surface forming a guide for the inwardly extending bore 56-that a1so:ha a-downwardly sloping top wall wherein the bore 56 is generally .'-shaped, as shown in Figure 6.

Referring now specific-allyto Figures 7 and 8,-it'will be seen that the numeral '62 generally designates a modified form of chisel. guard the present invention wherein the channel-shaped *m'ember is provided with spaced hinge barrel membcr do on one edge thereof for pivotally receiving a closure member '68 having a hinge barrel Fil on edge theszeof and ahinge pin '72 extending through the hinge barrels 66 and "79 when they are aligned, thereby pi-vo'tally securing the closure member till to the channel-shaped member 6 Theedgeof the member as remote from the hinge barrel '70 is pro vided with depending lip i l-having a concave recess 76 lllui'fiifi for spring engagcmcnt-with'a projecting longitudinal tie-tent 37.8 on the edge of =the channel-shaped member 64 remote from the hinge barrel 66. Dther than the structure specifically set forth above, the chiselguard 62 is identical. in construction to the chisel guard 10 as illustrated in Figures 1-4.

Referring specifically .tO Figures 9-11, it will be seen that the numeral fill generallytdesignates another modilied form or". chisel guard ofthepresent invention including an elongated channel-sl'laped member 82 having outturned edg ti l .on upper ends of the side flanges thereof for slidably receiving an elongated .cl-osure plate 86 having inturned side edges 88 in sliding engagement with and-receiving the outturned edges 84 of thechannel member 82- The siclcfianges of the channel .mernber are provided with inturned flanges 90 having straight side walls 92.2 for receiving the shank .16 of the chisel 12 wherein the ciosureplatefi retains the chisel 12 in positi on.

Figure 12 shows a modified form of chisel 94 having a small shank 6 Witha sharpened beveled cutting edge together with semi-cylindricalprojections 109 on the shank 96 which form abutments'for positioning behind the flanges the channel-shaped member. Inasmuch as the inserts in each may be longitudinally adjusted, it will be seen that the chisel guards of the present invention may be utilized with. various types and sizes of chisels wherein after adjustment, they may be easily andquickly assembled onto thechisels for protecting the cutting edges thereof during the itime when the chisels are not in use and accidentally engage other tools or objects that would tend to dull the cutting edge thereof. The chisel guards may be constructed of readily obtainable material, and the inserts should be wood, plastic or similar soft material for protectingthe cutting edge.

Figure 13 shows a modified form of insert 10.2 of twopiece construction that may be assembled by use of a fastener RM. 'The lower leg 1M ofthe insert 1 52 is constructed of plastic and the upper portion of the insert is provided with an inclined end wall M8 having aconcave surface whereby variou sizes of chiselsinay be guarded by a single chisel guard.

The foreg-cing'is con's'ideredas illustrative only of the principles of the invention. Further, since numerous modifications and changes will readily occur .to those skilled in the art, it is not desired to litnliirthe invention to the exact. construction and operation shown and described, and accordingly, all suitable modifications and equivalents may be resorted to, falling within thescope of the appended claims.

What is claimed as new is as follows:

l A chisel guard comprising elongated channelshaprd member adapted to receive .a chisel, mean in said incmber'for receiving and protecting the sharpened end of the chisel, and locking means securing thechisel insaid member, .said channeleshaped member having inturned -for-engageme11t-With the shank of the chisel for retaining the chisel in said member.

2. A chisel guard comprising an elongated channelshaped member adapted to receive a chisel, means in said member for receiving and protecting the sharpened end of the chisel, and locking means securing the chisel in said member, said channel-shaped member having inturned flanges at one end thereof forming a restricted opening for engagement with the shank of the chisel for retaining the chisel in said member, said inturned flanges terminating with concave edges for gripping opposite peripheral surfaces of the shank of the chisel.

3. A chisel guard comprising an elongated channelshaped member adapted to receive a chisel, means in said member for receiving and protecting the sharpened end of the chisel, and locking means securing the chisel in said member, said means for receiving the sharpened end of the chisel comprising an insert of soft material, said insert having an inwardly extending 'V-shaped notch in one end thereof for receiving and generally conforming to the sharpened end-of the chisel.

A chisel guard comprising an elongated channelshaped member adapted to receive chisel, ,means in said member *for receiving and protecting the sharpened end of the chisel, and locking means securing the chisel in said member, saidxmeans for receiving the sharpened end of the chisel comprising an insert of sort material, said inserthavinganinward'ly extending V shapednotch in one end thereof'for receiving and generally conforming to the sharpened end'of the chisel, the lower leg of the V-shaped notch extending outwardly and having a tapered upper surface for forming a guide for the sharpened end of the chisel.

5. .Achisel "guard comprising an elongated channelshaped member adaptedto receive a chiseL-means' in said member-for receiving andtprotecting the sharpened end of the chisel, and locking means securing the chisel-in said member, said lockingmeans including a longitudinally slidableloop mounted: on said channel member formoveinent into encircling engagement with the chisel and channel member, and means.releasablylocking said loop in adjusted position.

.6. .The combinationof claim 4 wherein -.saidloeking means includes a closuremember pivotally attached-to one edge. of said channel shape-dinemben'and latch means releasablyretairiing;the.closure member in overlying relation tothe chisel positioned in saidchannel member.

7. The combination of claim 4 wherein said locking means includes an elongated plate slidably mounted on said channel.shapedxmember, said, plate having inturned edges for .slidably. interconnecting withoutwardly extending flanges on said channel member.

8. A chisel-guard comprising an elongated channelshaped member adaptedztoreceiveachisel, means, in said member for receiving and protecting: the sharpened end of the chisel, and .locklng;mea-ns securing thev chiselin said member, said channel-shaped member having inturned flanges at oneiend the eofiorminga restricted opening for engagement with the shank of the .chisel forretaining the chisel in saidmeinber, said'meansfor receiving the sharpened end of the ichiselcoinprising an insert mounted in said channel-shaped;member for longitudinal adjustment, said insertliaising-constructed:ofitwo pieces with the juncture of the pieces forming a notch for receiving the sharpened end of the chisel.

ReferencesCited inthe file'of this patent U NITED STATES PATEN T S 723,387 'Mattley .Dec. 13, 1910 1,109,044 Conti Septl, 191.4

"2,053,707 Farmer Sept. 8,1936

FOREIGN PATENTS 113,784 Sweden Apr. 10,.1945

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