US2648564A

US2648564A - Broken axle puller

Info

Publication number: US2648564A
Application number: US159499A
Authority: US
Inventors: Tarapacki John
Original assignee: Individual
Current assignee: Individual
Priority date: 1950-05-02
Filing date: 1950-05-02
Publication date: 1953-08-11
Anticipated expiration: 1970-08-11

Description

Aug. 11, 1953 J. TARAPACKI 2,648,564

BROKEN AXLE PULLER Filed May 2, 1950 3 2 22 23 zaa I I7 s I IN V EN TOR.

.JO//N TAPPACK/ ATTORNEY Patentecl Aug. 11, 1953 UNITED 'ras ATENT OFFICE 4 Claims.

My invention relates to an axle puller tool that will circumferentially grasp a wheel axle and thus enable the easy and efcient withdrawal thereof, which withdrawal is accomplished in a manner superior to that done heretofore.

An object of my invention is the production of a tool of the class of wheel axle pullers that is comparatively simple in Construction and easy of manufacture, yet such manner of Construction enabling a firm hold upon an axle to be pulled.

Other objects and features of my invention will become apparent from the following description relating to the accompanying drawings showing the preferred form.

Referring to the drawings:

Fig. 1 is a longitudinal cross-section of the wheel axle puller tool;

Fig. 2 is a cross-section View showing the multiple gripping jaws together with cooperating linkage members;

Fig. 3 is a cross-section View showing the assembly of the multiple pronged jaws at the section of said tool to which said p-ronged jaws are pivotally attached;

Fig. 4 is a detail plan View of one of the prong gripping jaws showing the vane or web Construction thereon; and

Fig. 5 shows a further detail of one of the prong jaws at the pivotal hinging section thereof.

Referring to the drawings and particularly to Fig. l, the numeral I il designates the wheel puller tool proper and lil designates the handle thereof. said handle ie may be either a handle as shown or a hand wheel. said handle is attached to the shaft ll. The handle or hand wheel lil is held substantially to the shaft I l by means of the lock nut !2, the threaded opening of which is screwed into said shaft I I. !3 is a tubular casing which houses the shaft I I, said shaft being maintained in central position relative to the inner portion of said casing !3 by means of the collars !3 and Hi, and said collars are secured to said shaft Il by means of pins !3 and M said collars also maintaining said shaft in position and without appreciable reciprocal movement or play thereof upon the rotation of said shaft l l through the medium of said wheel lil in either clockwise or counterclockwise direction.

The casing [3 is knurled along the straight section thereof to facilitate hand gripping of the tool proper ia, upon a wheel axle.

The end of the shaft ll opposite to the handle !2 thereof has a threaded portion H and is contained in a housing 23, theinner section of Z u said housing being threaded at 23 and the latter engaging with the threaded section Il of i the Shaft l l.

The lower portion 22 of 'said housing 23 is of solid rod or block iormation.

The rotating movement of the shait II impelled by the turning of the wheel or handle u causes the threaded housing 23 to move either forward or backward in accordance with which direction of rotation the handle or hand wheel [0 is turned.

There are a multiple number of prong jaws IT, each jaw being pivoted at !8 to the lower enlarged section [5 of the casing ll. On the underside of each prong jaw l'l is a bracket H A link member !9 is pivotally attached to each of said brackets ll. The opposite end of each link member !9 is pivotally attached to the rod or block 22 of the housing 23.

The inner gripping portions of the multiple prong jaws I T are knurled or corrugated as at I'I to enable a better grip upon an axle to which the tool is applied. The grippng jaws are of reduced cross-section of metal in order to reduce the overall diameter of the tool.

IS is the web or vane structure of the grpping jaws !9 for the strengthening and stability thereof. The structure of the gripping jaws with the inclusion of the web or vane I 6 serves to prevent bending of said multiple jaws ll which are reduced to a minimum thickness in order to maintain a minimum over-all diameter of said jaws ll.

said jaws are subjected to severe stress when caused to grip a broken axle preparatory to the pulling thereof.

The purpose of the threaded portion I I of the shaft H and the threaded portion 23 of the housing 23 is to cause the multiple prong jaws I'! to expand or to retract upon the rotation of the handle m in one way or the other The expansion of the jaws H enables the fitting of the tool !a to the wheel axle and the retracting of said jaws enables the g'ripping or clamping thereof. By referring to Fig. 1, it Will be seen that the gripping tool as a whole is exceedingly narrow in diameter such being an essential requirement of a wheel axle pulling tool, such narrow diametric shaping is attained by the novel manner of pivotally hinging said multiple jaws H and the linkage connection between said jaws and the housing 23.

I am aware that wheel puller tools have been heretofore' employed; however, the present invention offers a new tool of greater utility than heretofore produced in the fact that a far better h 3 grip is obtained on a wheel axle through the medium of the multiple number of prong jaws and the particular fulcrums thereof of said jaws having circumferential grip on the broken wheel axle, thereby greatly increasing the grip being virtually a clamp thereon as compared with the operation of other similar wheel axle tools.

As already stated the projecting or end portion of said toolghas 'a minimum over-all diameter when the gripping jaws ll are in closed position which enables the ready and unobstructed insertion of said tool into the wheel axle bore, and when so inserted said tool comprising the invention has a maximum gripping power 'upon the outer surface of a broken wheel axle thus enabling the removal thereof without slippage in such removal.

The efiort, viz., the rotary movement of the shaft H and the screw threads H thereof engaged 'in .the block or housing 22 enables a comparatively small expenditure of eiiort on the part of the user of this tool.

For -each revolution of the shaft H the housing or block 22 is caused to advance a distance equal to the pitch of the screw thread 23 'Thus the work input of the turning of the shaft H multipliedby the distance of the fulcrum to the 'point where the work ,is tapplied equals the efiort, viz. turns of the shait ii causing the travel thereof.

Futhermore, in Fig. l it will be seen that .there is a pointof leverage of the jaws il at the pivoted hearing 1.8, said bearing being in close `relative .position with the block 22 and with the ;lower ,portion of the shaft H and being slightly above :the screw thread 23 thereof.

Thus the position of the jaws i'a' hinged at the bearings [8 and being in close relative position with sha-ft ii and block 22 enable said jaws to have .added gripping power upon the axle wheel shaft although said jaws as stated are confine'd .to a restricted and small diametric area with ;small spread of said jaws because of the enlarged distance between the ulcrum point !8 and the -hinged bearing !9 of the links 59 which are-pivoted at the terminal end of the block 23. ,Thelinks i?) extend downwardly from the block 523' and .hinge at the lower ends thereof at 'the ;pivot point le securing said links with the gripping jaws respectively.

It can be seen therefore, that upon the rotation of the wheel m and the consequent rotation of the -shait l i will cause a downward pressure of said housing or block 22 against the pivot points -s and ta The -pressure of the shaft ll below the pivot point !8 and upon the pivot points is and IS below the housing or block 23 in the manner described gives an added advantage of the lever princ'iple under the general law of the lever as appli'ed ,to my invention, said leverage being the distance between -the pivot points s above said housing 22 and the pivot points !9 said distance being greater than the distance between the pivot points is and the end portion or gripping jaws of said wheel axle puller, thereby affording maximum gripping power of said jaws despite limited diametric dimensions;

What I claim is:

1. In a wheel axle puller tool comprising a casing, :handle means ,at one end thereof, .a shaft :connected tosaid handle means, saidshaft con- :tained within said casing said casing .having an ;enlarged section at the lower .end thereof, three or more gripping jaws pivotally attached 'to said 4 enlarged section of said casing, said shaft having a threaded portion at the lower end thereof. a housing Situated between said jaws below said shaft, and below the pivot points of said jaws upon said enlarged lower section of said casing, said threaded portion of said shaft rotatable within a threaded aperture in said housing, linkage means interjacent with said multiple gripping jaws and the lower portion of said housing and pivotally connected .respectively with each jaw of said multiple jaws and the outer portion of said housing; and collar securing means attached to said shaft to hold said shaft within a restricted reciprocal movement upon the rotationofsaid shaft by said handle means in either clock-wise or counter-clockwise direction.

:2. *In a tool of the class described comprising a casing, a handle at one end thereof, a shaft within said casing and attached to said handle, aihousing .below said casing, a threaded opening in said housing, said shaft having a threaded extension, said threaded extension threaded into and rotating within said threaded opening, col- 'lar means attached to said shaft to hold said shaft in said casing and to limit the end play .thereof, multiple gripping jaws surrounding said housing and pivotally attached to said casing at the other end thereof and above said housing, linkage means attached to each of said gripping jaws and to said housing at the lower outer portion thereof, said multiple gripping jaws orming a circumferential -clamp upon a wheel axle upon the rotation of said handle and the release of said clamping of said multiple jaws from said axle upon the reverse rotation of the handle aforesaid.

In a wheel axle puller tool comprising a casing, handle means at one end thereof, a shaft within said casing and connected to said handle means, three or more grippingjaws pivotally attached to an enlarged section of the lower end of said casing, said shaft having .a threaded portion,.a housing below said casing and below said pivoting points of said multiple jaws, said housing also within the ,central area of said wheel axle puller tool and surrounded by said gripping jaws, said housing having a threaded opening, said threaded portion of said shaft threaded into said threadedopening, link member means pivotally attached to the lower end of said housing at the outer portion thereof and to the pivotal bearingsoneach of said multiple gripping jaws, whereby the distance between the pivoted ends of said link member means to said gripping jaws-and the pivot points thereof attached to casing is greater than the distance between said pivoted ends ?of said link member means to said jaws and .to the end of said gripping portion of said jaws, thereby enabling a maximum gripping force of said multiple jaws circumferentially applied to a wheel axle and forming a clamp thereon upon the rotation of said handle means, and the release of said clamping of said jaws upon said axle upon the reverse rotation of said handle means.

4. In a wheel axle gripper tool comprising a casing, handle means at one end thereof, a shaft within said casing and connected to said handle means, an enlarged extension integral to the `lower end of said casing, said shaft extending through said casing and the enlarged extension thereof, said shaft having a threaded portion a't the end thereof, said threaded portion rotatable within a corresponding threaded housing, a collar securely pinned to said shaft 'above said enlarged extension and at a point above said housing, a second collar securely pinned to said shaft below said enlarged extension of said casing, a multiple number of gripping jaws pivotally attached to said enlarged extension and at a point above said housing, a multiple number of link members pivotally attached to the ends thereof to the lower end of said housing, said link members being also pivotally attached to corresponding gripping jaws aforesaid, the distance between said pivoting points of said link members to said gripping jaws and pivot points of said jaws to said casing being greater than the distance between said pivoted points of said links to said jaws and the end or gripping portion of said jaws, whereby a maximum force is exerted at the ends of said j aws in circumferentially clamping a wheel axle for the extraction thereof upon the rotation of said handle means, and the release of said clamping of said gripping jaws upon the reverse rotation of said handle means, each of said jaws having a weblike vane integral to the understructure of said jaws thereby strengthening said jaws at the walls thereof against pressure exerted consequent to the clamping of said jaws upon said wheel axle.

JOHN TARAPACKI.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 1,430,702 Troutman Oct. 3, 1922 1,756,441 Smith Apr. 29, 1930 1,814,368 Chapman July 14, 1931 1,938,419 Freidlein Dec. 5, 1933 FOREIGN PATENTS Number Country Date 161,653 Great Britain Apr. 11, 1921