US2702488A

US2702488A - Shock absorbing holder for cold chisels and the like

Info

Publication number: US2702488A
Application number: US371799A
Authority: US
Inventors: Lester A January
Original assignee: Individual
Current assignee: Individual
Priority date: 1953-08-03
Filing date: 1953-08-03
Publication date: 1955-02-22
Anticipated expiration: 1972-02-22

Description

Feb. 22, 1955 A. JANUARY SHOCK ABSORBING HOLDER FOR COLD CHISELS AND THE LIKE Filed Aug. 5, 1953 v IN VEN TOR. A 5 72:764. dmvan ,e V BY W y 7 s k AI'I'Ok/VEVS United States Patent SHOCK ABSORBING HOLDER FOR COLD CHISELS AND THE LIKE Lester A. January, Palo Alto, Calif.

Application August 3, 1953, Serial No. 371,799

3 Claims. (Cl. 81-1) This invention relates to tool holders and more particularly to an improved shock absorbing holder for cold chisels and the like.

The device of the present invention is adapted for use as a holder for tools such as chisels, steel punches, nail sets, star drills, miners and/ or stone cutters drills, or any other instrument of like character for cutting hard materials, which instrument must be held while being struck heavy blows with a hammer or mailet. One of the principal objects of this invention is to provide a holder for instruments of the character mentioned for the purpose of absorbing the shock or vibrations which occur between the hammer blows and the hard material being cut with the particular instrument held.

Another object is to provide a simple holder for tools with a handle remote from the tool and a cushioning element between them for maintaining the tool in proper position and for minimizing any vibrations created by the hammer blows against the tool as effected by the resistance of the hard material being cut thereby.

These and other objects and advantages of the device of the present invention will become apparent in the following descri tion when read in the light of the drawings in which:

Fig. 1 is a side elevation of a tool holder embodying the present invention.

Fig. 2 is a plan view of the same as seen from above in Fig. 1.

Fig. 3 is an exploded perspective view of the parts involved at the tool holding end of the device shown in Figs. 1 and 2.

Fig. 4 is a fragmentary front elevation of the tool shown in Fig. l and as taken from line 44 therein.

As seen in the drawings, the device embodying the present invention is designated 10. It comprises a shank member 11 having one end forked or bifurcated as at 12 to provide arms 13-14. The opposite end of the shank member 11 is provided with a hand grip 15 of conventional design. The hand grip 15 may be made of wood or plastic as desired.

The invention further entails the provision of a lug 16 on one side of a tool 17 to be held. In the instant disclosure, the tool 17 is a cold chisel, but it should be understood that its tip may be of any desired shape, namely, that of a star drill, a punch or a nail set.

The lug 16 provided on the side wall of the tool 17 is preferably disposed just above a point midway the upper and lower ends 18 and 19, respectively, of the tool 17. The lug 16 has flat sides 20-21 spaced from each other to fit snugly between the arms 1314 of the bifurcated end of the shank 11. Both arms 13-14 as well as the lug 16 are drilled to receive a bolt 22 for pivotallv connecting the tool 17 to the shank 11. The bolt 22 has a nut 23 -on its threaded end 24 for securi1n7g the shank 11 perpendicular to the axis of the tool In addition to the foregoing, the tool 17 has a hook 25 secured to its upper end 18 on that side thereof from which the lug 16 extends. The shank 11 is provided with an eye 26 on its upper side in a plane coincident to that in which the hook 25 is disposed.

A coil spring 27 has one end 28 thereof anchored to "ice the eye 26 on the shank 11 and the opposite end 29 of the spring 27 is adapted to be secured to the hook 25 on the tool. It will thus be seen that the spring 27 extends diagonally within the quadrant between the shank and upper portion of the tool.

The arrangement is such that the spring 27 is not tensioned to any great extent when the tool and shank are perpendicular to each other. However, when the upper end 18 of the tool is struck a blow with a hammer H as illustrated in Fig. 1, any tendency for the tool to vibrate is minimized by the action of the spring 27 upon the upper end of the tool. Moreover, since there is a greater tendency of the workman while grasping the hand grip 15 to press the latter forwardly, i. e., toward the tool when striking the latter with the hammer H, the spring 27 being disposed in the upper quadrant, between the shank and upper end of the tool counteracts the aforementioned tendency, on the part of the workman, to lean on the tool or tilt it forwardly. As a result of this arrangement, the tool axis is maintained perpendicular to the shank by resilient means which has a shock absorbing effect.

While I have described my improved tool holder in specific detail, it will be apparent to those skilled in the art that the same may be altered, varied and/ or modified without departing from the spirit of my invention. I therefore desire to avail myself of such alterations, variations, and/or modifications as fully come within the purview of the appended claims.

I claim:

1. A shock absorbing holder for a tool such as a cold chisel and the like comprising a shank having a hand grip at one end and its opposite end bifurcated, said tool having a lug extending from one side wall thereof, means for pivotally connecting the bifurcated end of said shank to said lug, and a spring having one end anchored to said shank and its opposite end secured to the upper portion of said tool adjacent the upper end tgereigf for maintaining said tool perpendicular to said s an 2. A shock absorbing holder for a tool such as a cold chisel and the like comprising a shank having a hand grip at one end and its opposite end bifurcated, said tool having a lug extending from one side wall thereof just above a point midway the upper and lower ends of said tool, means for pivotally connecting the bifurcated end of said shank to said lug, and a spring having one end anchored to said shank and its opposite end secured to the upper portion of said tool adjacent the upper end thereof for maintaining said tool perpendicular to said shank and for counteracting the tendency of the person gripping said hand grip to urge the latter forwardly toward said tool.

3. A shock absorbing holder for a tool such as a cold chisel and the like comprising a shank having a hand grip at one end and its opposite end bifurcated to provide spaced arms thereon, said tool having a portion between its upper and lower ends flattened to provide parallel fiat faces spaced from each other to fit snugly between the arms of the bifurcated end of said shank, means for pivotallv connecting the bifurcated end of said shank to the flattened portion of said tool, and a spring having one end anchored to said shank and its opposite end secured to the upper portion of said tool adiacent the upper end thereof for maintaining said tool perpendicular to said shank.

References Cited in the file of this patent UNITED STATES PATENTS