US2502713A

US2502713A - Rod bending device

Info

Publication number: US2502713A
Application number: US635869A
Authority: US
Inventors: Walter E Fagge
Original assignee: Individual
Current assignee: Individual
Priority date: 1945-12-19
Filing date: 1945-12-19
Publication date: 1950-04-04
Anticipated expiration: 1967-04-04

Description

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ROD BENDING DEVCE Filed Deo. 19, 1945 '2 Sheets-Sheet 2 E IIS-E IHIIIIIIIIIIIIU NIIIIIIIIIIIIIIII @Cm l I uveutor Wim@ 0 Waffe Patented Apr. 4, 1950 non BENDING DEVICE Walter E. Fagge, Paoli, Pa. Application December 19, 1945, serial No. 635,869.

1 Claim.

This invention relates to a device for bending rods to form U-bolts.

U-bolts are often usedas hangers for pipes and conduits, and it is necessary that the bight or intermediate portion of each U-bolt be bent on a proper radius of curvature to snugly embrace the particular pipe or conduit with which the U-bolt is to be used.

The primary object of this invention is to provide a device which will be simple in construction, easy to operate, and efficient in the bending of rods to form U-bolts with bight portions of any desired radius of curvature, whereby to accurately conform to the cross-sectional curvature of the pipes or conduits with which the U- bolts are to be used.

A further object of the invention is to provide a novel rod bending device of the above kind including an abutment for an end of the rod to be bent, a former about which the rod is to be bent, and a lever pivoted to swing about the axis of the former and provided with a rod contacting member which causes the rod to be bent around the former when the lever is swung frompne position to another, the rod abutment and the rod contacting member being adjustable toward or from the former, and the former being adjustable in diameter so that the device may be employed to form U-bolts of different sizes from rods of different cross-sectional diameters.

Still another object of the invention is to provide, in a rod bending device of the above kind, a novel form of sectional former, a desired section or sections of which may be readily removed or applied to definitely vary the eiiective diameter of the former in accordance with the size of U-bolt to be formed.

Other objects and features of the invention will become apparent from the following description when considered in connection with the accompanying drawings, in which:

Figure 1 is a top plan View of a rod bending y Figure 6 is a perspective View of the rod abut-.

ment carried by the base.

Figure 7 is a plan View of a modified form of former employed when forming U-bolts of largerA sizes.

Referring in detail to the drawings, 5 indicates a base which may be securely held in a vise or"y suitably rigidly secured upon a support. The base 5 is preferably of inverted channel form as shown'` and provided With a central longitudinal elonf gated slot 6. Disposed upon the base 5 is a rod abutment 1 preferably in the form of a block]v having a flat face 8 at one end and provided ,near`I the other end with a vertical opening 9. A bolt II) extends through the slot 6 of the base 5 and the opening 9 ofthe abutment 1, and has a nut I I threaded on its upper end.- Thus, by loosening the nut II, the abutment 'I may be adjusted.y

longitudinally of the base 5 within the limits of the slot 6, and the abutment may be secured in adjusted position by tightening the nut II. The

abutment 1 may also be turned about the axis vof' the bolt I0 so as to position the flat face 8 at the desired tangent for properly contacting a side of the adjacent end of the rod I2 to be bent.

A hand lever I3 is pivoted at one end upon an end of the base 5 by means of a nutted pivot bolt I4 located in alignment with vthe slot 6 of the base. The bolt I4 extends vertically through the base 5 and lever I3 so that the latter is adapted to swing horizontally about a verticali axis, and a sectional former I5 is mounted on the bolt I4 upon the pivoted end of the lever I3 so as to be concentric with the pivot of the latter. The former I5 is composed of sections consisting of a plurality of snugly but separably associated short lengths of pipe or conduit I6 nested one within another. Thus, by varying the number of sections I6 used, the diameter of the former may be changed in accordance with the size of U-bolt to be formed. It will be noted that a U-bolt for use in connection with a pipe or conduit of given diameter will be bent about a former section constituting a length of pipe or conduit similar to the pipe or conduit in connection with which the U-bolt is to be used. In this way, the rod will be bent on a proper radius of curvature to accurately embrace the particular pipe or conduit with which the U-bolt is to be used. It has been found that up to a predetermined size, the sections of pipe or conduit will snugly nest so that use of the sectional former is made practical. However, for bending rods to form U-bolts of greater than a predetermined size, it will be necessary to use a special former such as illustrated in Figure 7. This modified form of former shown in Figure 7 simply consists of a short length of pipe or conduit I 6a of the desired larger size, and crossed plates II tted and welded within the pipe length ISa and provided at their point of intersection and axially of the pipe length Ilia with registered openings I8 to receive the stem of bolt I4 when in use.

A rod contacting member I8 is adjustable longitudinally of and mounted on the hand lever I3, and this member includes a sleeve i9 slidably tted on the lever I3 and a rod engaging finger 20 rigid with and projecting diagonally forwardly and inwardly from one side of the sleeve I9. It will be noted that, in the bending operation, the rod I2 to be bent is disposed to extend across the base 5 and the lever I3 so that the former I5 is disposed at one side of the rodwhle the abutment l and contact finger 20 are disposed at the opposite side of the rod, The contact member I8 and abutment 'I are then adjusted to contact the' rod I2 with the latter in contactwith the former I5 and with the proper portion of the rod I2 projecting past the former in a direction away from the abutment T. I3 is swung from the position of Figure 1 toward the position of Figure 2, the contact member I8 is canted relative to lever I3 so as to cause the sleeve I9 to bind against the edges of the lever and thereby maintain said contact member I8 in its proper adjusted position. As the lever I3 is swung in this direction, the nger 20 presses against the rod and causes its intermediate portion to be bent around the former until the rod assumes the U-shape shown in Figure 2. By threading the ends of the rod I2 as at 2YI before it is bent, the U-bolt will be completed at the end of the bending operation. By removal of the bolts I 0 and I4, the device Amay be taken apart for compact storage when not in use.

From the foregoing description, it is believed that the construction, operation and advantages ofthe present invention will be readily understood and appreciated by those skilled in the art. Minor changes may be made in details of construction, such as fall within the scope of the invention as claimed.

What I claim is:

A rod bending device comprising an inverted channel-shaped base embodying a nat horizontal plate member provided with a central elongated slot, a hand lever having one end disposed on the As soon as the lever upper face of said plate member near one end of said slot, a vertical pivot bolt extending through the plate member and said end of the hand lever so as to mount the latter for swinging movement parallel with the plane of said plate member, said pivot bolt projecting upwardly above the hand lever, a tubular cylindrical former seated on the pivoted end of said hand lever and removably mounted on the upwardly projecting portion of the pivot bolt concentric with the pivotal axis of said lever, said former being unsecured against upward removal from the pivot bolt, a horizontally elongated rod abutment disposed on the upper face of said plate member and having a side contact face, a nutted clamping bolt passing through the slot of said plate member and one end of said rod abutment to secure the latter at different distances from the former and in different positions of angular adjustment about a vertical axis defined by said clamping bolt to accommodate rods of diierent lengths and crosssectional sizes, a cantable sleeve loosely disposed and slidable on said hand lever, and a rod contacting bending finger rigidly carried by said sleeve and adjustable with the latter longitudinally of said hand lever.

WALTER E. FAGGE.

REFERENCES CITED The following references are of record in the le of this patent:

UNITED STATES PATENTS FOREIGN PATENTS Country Date Great Britain May 23, 1890 France Feb, 21, 1921 Number Number OTHER REFERENCES Die-Less Duplicating, Catalog No. 44-6, p. 34, 1944; ONeil-Irwin Mfg. Co., Minneapolis, Minn.

France Oct. 15, 1929"