US2192428A - Rod bender - Google Patents

Description

March 5, 1940. w. v. BERNARD 2,192,428

ROD BENDER Filed April 8, 1938 Patented Mar. 5, 1940 UNITED STATES PATENT OFFICE i 2,192,428 I I non BENDER William Vernon Bernard, El 06mm, Calif.

ApplicationAprilfi v193s, Serial No. 200,921

9 Claims. (01. 8115) This invention, a rodibender, is specifically de-' signed for bending the ends of tie :I'OdS about the studs or purlins of concrete forms, and due to its specific structure and method of operation '5 convertsythe tiered into a combined tying and spacing element.. k

Different methods are used for tying and spacing thewalls of concrete forms, the most commonly-used being in the form of wires which 10 are looped about the studs and through the form and twisted for tightening, with a strut placed between the walls as. a spacing element.

Other systems'employ. special tie rods, which in ,some'cases form .both, a tyingelement and spacing element, however such. devices-as 'arenow used are uneconomical, due to the cost of formingshoulders, clips, and other devices and means necessary for their proper functioning. This invention utilizes plain circular or non circular rods which are merelycut tolength, and formed with or without notches according to whether the projecting ends of the rods are to vbe broken off after the concrete has set, or are to be retained to function as'facing' anchors.

The rods used may have one of their ends preformed or, both ends may be formed on the job, as desired, since the-tool comprisingithe in- Fig. 2 is a sideview of the clamp handles of;

Fig. 3 is a front elevation of the invention Q showing one handlein position of completing a bend.

Fig. 4 is a fragmentary plan view illustrating one of the forming arms in open position ready to receive" the rod to be bent, and 1 45 5 shows the rod bent about a stud and anchored thereto to form the spacingwelement. The anvil l0 coincidently functions as a-pivot block andlower clamp jaw, and has straddling ears H and I2 projecting rearwardly and con- 50 tinuing into an upper clamp-handlelii projecting rearwardly therefrom. Theanvil also has integral lateral ears l4 and I5 formed at its opposite ends for mounting of the forming arms.

The anvil Hlalsohas a rod aligning and retain- "i g oo e r'ls t immed. in it n a nd throughout its width, to receive and transversely position the tie rod I! for bending, the terminal ends of the front wall of the groove forming fulcrums for bending the rod.

A lower clamp-handle I8 for the upper clamp 6 jaw'has an eye l9 which fits between the ears I l and I2 and is pivoted therebetween by means of a pivot and has an integral upper clamp jaw 2! provided with an undergroove 22 formed complementary to and in regis'trable relation, to 10 the groove 16 in the anvil lil, so that, by manually urging the two clamp handles l3 and 58 toward each other, the rod H can be fixedly held between the jaws within the grooves during the bending operation.

' The operating levers 23 and 2d are respectively mounted at each end of the anvil Wand pivoted by means' of pivots 25 to the respective ears M and I5, theaxis of thepivots'25 falling in the plane of the rear wall of the groove it. Each 9 operating lever 23, 24, has a forming arm 26 integral therewith and formed substantially at right angles thereto.

Each forming arm 26 is provided with'a rodrec'eiving recess 21 axially aligning with the rodretaining groove I 6 when the levers 23 and 24 are in one position and herein termed the open position, for endwise reception of the rod, and this recess has only a bottom wall and a back wall, the front wall being omitted so as to avoid 8}] the introduction of any obstruction against removal of the tool from the bent rod.

A' stop, or rod-locating gauge 28 is formed adjacent the outer end of each forming arm respectively for right hand and left hand bends, 8|} and forms an obstruction for cooperation with the end of the rod as the rod is threaded through the grooves 21, I6 and 21, the stop on only one of the arms functioning as a. gauge, depending on' the direction of insertion of the rod, the stops 40 projecting forwardly into the recesses 21. x When a rod I1 is threaded through the axially aligned recesses 21, I6 and 21 with the tool in open position as illustrated fragmentarily in Fig. 4, the forward end of the rod will strike the gauge 28 and be stopped thereby, thus establishing the bend points on the rod relative to its terminal end, consequently establishing the spacing between the walls 29 of the forms.

Each forming arm 26 has an integral lug 30 overhanging the portion of the recess 21 between the axis of the pivot 2 5 and the end of the anvil II] when the tool isopen, forming a short length i of top wall for the recess 2'! and which swings out of the way in non-obstructionless relation to Q6 pletely formed, to permit direct removal of the tool from the formed rod.

rod-retaining groove and superposedly related to i said anvil; and cooperative handles integral respectively with said anvil and with said clamp member and pivotally connected together i for manual urgence to clamp the rod within and between the groove and recess.

8. A tool as defined in c1aim 6; and gauging means associated with one of said forming arms and obstructively related to the outer end of said rod-receiving recess forming a stop for the end of the rod for gauging the position of the end of the rod relative to said fulcrum points as the straight rod is threaded through the open tool for determining the position of the bends.

9. A tool asdefined in claim 4; and a stop lug formed at the outer end of eachiorrning arm and projecting into the rod-receiving recess; the

lugs on the respective arms functioning selectively as a gauge or stop for the end of the rod When the tool is threaded onto the rod for right hand or left hand bending of the rod.

WILLIAM VERNON BERNARD.

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