US2539040A

US2539040A - Pivoted hand tool for body and fender straightening

Info

Publication number: US2539040A
Application number: US779525A
Authority: US
Inventors: Charles H Sparhawk
Original assignee: Individual
Current assignee: Individual
Priority date: 1947-10-13
Filing date: 1947-10-13
Publication date: 1951-01-23
Anticipated expiration: 1968-01-23

Description

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2 Sheets-Sheet l Filed OCb. 13, 1947 Inventor Char/es H. Sparhowk Jan. 23, 1951 Q H, SPARHAWK 2,539,040

PIVOTED HAND TOOL FOR BODY AND FENDER STRAIGHTENING 2 Sheets-Sheet 2 Filed Oct. 13, 1947 Inventor 'T1 Char/es H. Spar/:awk

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Patented Jan.. 23, 1951 Plvornn HAND TooL Fon BODY AND FENDEHSTRAIGHTENING Charles H. Spar-hawk,=Park Ridge,l Wis.

Application October 13, 1947; Serial Nc. 779,525

5 Claims.

The present invention relates' tot new andi use ful improvements in body andl fender tools adaptedv for.I use in straightening dents orV` depressions in a1 metal vehicle' body or fender and more particularly to a hammer for striking a blow at one side of the work and an anvil for positioning at an oppositeside of the work and which forms a guide to indicate the position for striking the hammer blow.

In repairing or removing dents or depressions in an automobile body orfender and particularly where it is necessary to strike a hammer blow from thel under side, it is difficult to de` liver the hammer blows to certain inaccessible parts of theA work, and accordingly, it is an object of the present invention to provide a tool of this characterby means of which the ham-V mer may deliver a blow to a desired' part of the body or fender without necessitating the me"- chanic reaching underthe same.

A further object ofthe invention is" to'. provide supporting' means for the'k hammer and to which the hammer" is pivotally attached and embodying means' whereby the supprt'ingimeans may be clamped in position against the op'- posite surfaces of theV work, thus leaving' the handsk of the mechanic free for operating; the

hammer. 1

A still further obiect is" to provide a tool of this character of simple and' practical construction, which is strong and durable, efficient and reliable in operation; relatively inexpensive to manufacture and otherwisewell adapted for the purposes for which the same is intended?.

Other objects and advantages reside in the details of' construction` and" operation as more fully hereinafter described and claimed, refer-4 en'ce being had to the accompanying drawings forming part` hereof, wherein like numerals re'- fer to like parts throughout, ai'idin which:

Figure I is aV perspective viewf the tool;

Figure 2A is a fragmentary sideelevation'al-view showing the pivoted' extension` for the' upper clamping' arm in*itsreleasedposition;

Figure 3 is a fragmentary side elevational view showing the tool clamped in position at the opposite surfaces of the work, the latter being shown in section;

Figure 4 is a side elevational view;

Figure 5 is a top plan view;

Figure 6 is an enlarged detail of the interchangeable hammer head with parts shown in section; and

Figure '7 is a group perspective view of the il i 2 attaching stemv for thefhammer head and locking-3 key therefor.

Referring now to the drawings in detail wherein,. for the purpose of illustration, I have disclosed a preferred embodiment of the invention', the numeral 5 designates an upper.l clamping arm and the numerals 6 and 1 designatea pair of lower clamping arms arranged in spacedl parallel relation with respect to each other and between which the upper clamping arm is centered. The' rear ends of the upper and lower clamping arms are rigidly `connected to each other by means of an arcuate plate 8 at the rear end of the upper' arm 5" andk to the side edges of which the rear ends of the'lower arms E and are welded or otherwise suitably secured. Braces 9 also extend from the rear ends of the lower arms 6 and l to the upper edges of the plate 8. i

An extension Ill` is pivoted at the front end ofthe upper arm 5 for vertical swinging movement and the extension is locked in a rigid longitudinally aligned' position with the arm 5 by means of a locking sleeve II slidably mounted on the arm into and out of position over the connected ends of thev arm andv extension; The rear portion of the extension I0 is provided with a locking pin I2 engaged in a` bayonet slot" I3 at the front end of the sleeve II tov lock the sleeve by a partial rotary' movement thereof. The sleeve II is provided with a handle I4 to facilitate the sliding thereof into and out' of its locking position andthe arm 5 is provided wit a stop I5 in the path of rearward movement of the sleeve to limit the rearward movement thereof.

' The front end of the extension I0 is formed with an eye I6 which provides an anvil for bearingk against the outer surface of the work.

An annular clamping head II is supported in position centrally under the eye I6 by means of a pair cf' rods" lextending' upwardly from the lower' armsu 6 and 1, the" rodspreferably` being weldedto' the'arms aswell aste therhead IT; A brace I9" aisoextend's from ther rear edge'v of" the head I'! to the upper end of a substantially ovalshaped guide 2l! which is rigidly supported in an upright position between the arms 6 and 1 by connecting arms 2|. The lower side edges of the plate 8 are provided with bearings 22 in which the ends of a pin 23 are received and the bearing sleeve 24 is pivoted on the pin between bearings/g,` 22, the bearing sleeve being formed at the juncj extends forwardly under the arms 6 and 1 and through the guide 2! for the vertical movement of the hammer rod in the guide. Suitably secured to the front end of the hammer rod 26 is an upstanding hammer 21 for working upwardly through the annular head l1 and against the under side of the work 28 clamped in position between the head I1 and the anvil I6.

In the operation of the tool, the handle I4 and sleeve H are partially rotated to release the sleeve from the locking pin i3 and the sleeve is moved rearwardly on the upper clamping arm 5 and extension I0 at the front end of the arm is swung upwardly, as shown in Figure 2 of the drawing, to facilitate placing of the clamping head Il at the under side of the work 28. The extension i is then swung downwardly and the sleeve I I moved forwardly to lock the extension at the front end of the arm and in clamping engagement at the uppersurface of the work.

The lower clamping head Il and anvil i6 are` free to move over the work to a desired position for removing a dent or depression therein, the anvil i6 functioning as a guide to position the tool at the part of the vehicle body or fender to be repaired.

The rear end of the upper clamping arm 5 and handle 25 are then gripped by one hand of the mechanic and a squeezing action on the handle 25 will raise the hammer arm 26 and hammer 21 to strike a blow against the under side oi the work to thus straighten the body or fender as the case may be. Upon release of the handle 25, the hammer will gravitate to its lower position for striking another blow.

The hammer head 27 is formed with a stem 29 having an annular groove 30 therein and removably held in an eye 3| at the outer end of arm 2f, by a locking key 32 of disc form having a slot 33 therein receiving the groove of the stem whereby hammer heads of various types may be interchangeably mounted on the arm 2S in accordance with the character of the repair job.

The handle 25 is provided with a nger gripping loop 34 to enable back and forth movement of the arm 2S by the hand of a person when the tool is held in a perpendicular position.

Having described the invention, what is claimed as new is:

1. A mechanical hammer comprising upper and lower work clamping arms, and a hammer arm pivoted at the inner ends of said clamping arms and having an impact member at its outer end for striking a blow against one side of work positioned between the clamping arms, one of said clamping arms including a pivoted anvil, and means for locking the anvil rigidly to its associated arm.

2. A mechanical hammer comprising upper and lower work clamping arms, and a hammer arm pivoted at the inner ends of said clamping arms and having an impact member at its outer end for striking a blow against one side of work positioned between the clamping arms, one of said clamping arms including a pivoted anvil, and

means for locking the anvil rigidly to its associated arms, said locking means comprising a slide movable into and out of locking position between the anvil and its arm.

3. A mechanical hammer comprising upper and lower work clamping arms rigidly connected to each other at one end, a clamping head at the outer end of one clamping arm, an anvil pivoted to the outer end of the other clamping arm, means rigidly locking the anvil to said other clamping arm in clamping position at one side of the work while the clamping head is held at an opposite side of the work, a hammer arm pivoted to the connected ends of the clamping arms and having a striking head at its free end working through the clamping head, and an operating handle at the pivoted end of said hammer arm, said handle substantially paralleling one of the clamping arms for squeezing action of the handle by the hand of a person gripping said lastmentioned clamping arms.

4. A mechanical hammer comprising upper and lower work clamping arms rigidly connected to each other at one end, a clamping head at the outer end of one clamping arm, a hammer arm pivoted to the connected ends of the clamping arms and having a striking head at its free end working through the clamping head, an operating handle at the pivoted end of said hammer arm, a swingably connected anvil at the outer end of the other clamping arm in the path of a. blow delivered by the striking head, and means locking the anvil rigidly to its arms.

5. A mechanical hammer comprising upper and lower work clamping arms rigidly connected to each other at one end, a clamping head at the outer end of one clamping arm having an opening, an anvil pivoted at the outer end of the other clamping arm, means locking the anvil rigidly to said other clamping arm and adapted for positioning the anvil at one side of the work while the clamping head is positioned at an opposite side of the work, a hammer pivoted at one end to the connected ends of said clamping arms and having an impact head at its free end, and a guide carried by said first named clamping arm for the hammer to guide the hammer through the opening of the clamping head and against the work in the region of the anvil.

CHARLES H. SPARHAWK.

REFERENCES CITED The folowing references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 744,756 Haukvik Nov. 24, 1903 1,616,300 Bido Feb. 1, 1927 1,897,142 Peterson Feb. 14, 1933 2,320,074 Golnick May 25, 1943 2,322,318 Rose June 22, 1943 2,387,771 Rosenbrook Oct. 30, 1945 2,435,726 RohdeV Feb. 10, 1948