US2055034A - Bending tool - Google Patents

Description

Patented Sept. 22, 1933 BENDING TOOL Koehn. Montezuma; Kans, aha Jalmer a; p g Lyytinen; Kansas' City, Mo. v Application December 16, 1935; SerialNo. 54,693

aolaims. (01. 153 -15 Our invention relates-to a bending tool and while it may be used to advantage for bending rods, tubes and other articles, it is more particularly adapted for bending the valve-stems of pneumatic tires so that when the latter are installed on the wheels of automotive vehicles the outer ends of said valve-stems will extend outwardly to one side where they can be conveniently reached when it is desired to inflate the tires.

One object is to provide a simple, inexpensive and eflicient tool of this character for use by tire dealers and others having occasion to use a device of this character.

In order that the invention may be fully understood, reference will now be had to the accompanying drawing, in which:

Fig. 1 is a plan view of the tool with a valve stem in position thereon ready to be bent.

Fig. 2 is a side elevation of the parts shown by Fig. 1.

Fig. 3 is a longitudinal sectional view of the tool, taken on line 33 of Fig. 1, showing the hand lever raised instead of in the horizontal position, to form the initial bend in the valvea stem.

Fig. 4 is a vertical cross section on line 4-4 of Fig. 2.

Fig. 5 is a detail showing the valve-stem after being bent in two places with the tool.

In carrying out the invention we provide a bed-plate 2 reinforced on its upper side with a pair of longitudinal ribs 4 which are spaced apart to admit a hand lever 6 when the latter is in the horizontal position shown by Figs. 1 and 2. The hand lever 6 is bifurcated to provide a longitudinal opening 8 of sufiicient length and width to readily admit a straight or unbent valve-stem A connected in the usual manner to an inner tube B.

The sides of the opening 8 are united at their lower forward portions by a transverse bridge I0 which cooperates with a seat I|,'on the forward part of the bed-plate 2, in supporting and bending the valve-stem A as will hereinafter appear. The hand lever B is fulcrumed at one end upon a pivot l2 mounted in a pair of spaced ears l4 extending upwardly from the forward portion of the bed-plate 2 and beveled at their forward sides 15 to form seats for the oblique ends of the customary washer C mounted upon the valvestem A. One of the ears I4 has an upwardly extending shoulder I6 arranged in the path of a lug l8 projecting laterally from one side of the hand lever B to check the upward movement of the latter when it reaches the position shown by Fig. 3 to form the initial bend D in the valvestem A. The opposite sideof the hand'lever 6- is provided with an indicator 20 adapted to cooperate with an index point 22 on the adjacent ear M in determining when the hand lever B has been raised to an angle of approximately 45 degrees PATENT aoFFic-E to form the second bend E in the valve-stem A.

A gage 24 is formed on the hand lever B at opposite sides of the opening 8 so that it may be readily determined how far the valve-stem A should be inserted in the opening 8 preparatory to making the second bend E.

In practice the bed-plate 2 of the tool is secured by suitable means such as bolts F to the top G of a work bench, so that it will be firmly held in place and thereby leave one hand of the operator free to position the valve-stem A in the tool and the other hand free to operate the hand lever 6. When it is desired to initially bend a valve-stem the same is pushed forwardly into the opening 8 and beneath the pivot [2 until checked by the washer C contacting the beveled sides l5 of the ears [4 where it is held with one hand while the lever 6 is raised with the other hand to the position shown by Fig. 3. As the hand lever 6 moves upwardly it causes the bridge Hi to bend the valve-stem approximately a quarter turn around the pivot l2, while the end of the valvestem next to the inner tube B is held in its seat I I. The hand lever B is then lowered, after which the valve-stem A is pulled outwardly until its end H registers with the gage 24. The valve-stem A is then rotated a half revolution so that when the second bend E is formed it will extend in a reverse direction to the bend D as shown by Fig. 5. The hand lever 6 is then raised to approximately an angle of 45 degrees, which is determined by the indicator 20 registering with the index mark 22, to form the bend E. After being bent as stated the valve-stem A is removed from the tool.

From the foregoing description it is apparent that we have provided a tool which is well adapted for the purpose intended, and while we have shown a preferred embodiment of said tool we reserve all rights to such changes and modifications thereof as properly fall within the spirit and scope of the invention as claimed.

Having thus described our invention, what we claim and desire to secure by Letters Patent, is:

1. A device adapted to bend a valve-stem in two places comprising a bed-plate, a pivot spaced from said bed-plate to leave room for insertion of a valve-stem between said pivot and the bedplate, ears projecting from the bed-plate to sup port said pivot and act as a stop for the valvestem when the same has been inserted in the space far enough for the initial bending operation, a lever operably mounted upon the pivot and adapted to coact therewith and the bed plate in bending the valve-stem, and a gage on the lever adapted to coact with the valve-stem in determining correct positioning of the latter preparatory to the second bending operation.

2. A device adapted to bend an article intermediate the ends thereof and comprising a bedplate, a pivot supported above saidbed-plate to leave room for insertion of the article between said pivot and the bed-plate, a lever operably t mounted upon said pivot and adapted torcoact therewith and the bed-plate in bending the article, and gage means on the lever adaptedto coact with the article in determining correct positioning of the latter preparatoryto the bend-. ing operation.

3. A device of the character described comprising a bed-plate, a pivot supported above said bed-plate to leave room for insertion of a valvestem between said pivot and the bed-plate, a lever having a longitudinal opening for reception of the valve-stem and operably mounted upon said pivot, and bridge means extending across said opening and adapted to coact with said lever, the pivot, and the bed-plate in bending the valvestem.

4. In a device adapted to bend a valve-stem equipped with a washer having oblique ends, a pair of ears spaced apart to admit the valve and having beveled forward side to provide seats for the oblique ends of said washer, a support for said ears, a pivot mounted in said ears and spaced from said. supportrto leave room for insertion of avalve stem between said pivot and the support, and a lever operably mounted upon said pivot and adapted tocoact therewith and the support in bending said valve'stem.

' FRANK L. KOEHN.

' JALMER. LYYTI'INEN.

Images