US3038519A - Steel rod shear and bender - Google Patents

Description

June 12, 1962 s. M. BLAKE 3,038,519

STEEL ROD SHEAR AND BENDER Filed Aug. 9, 1957 V 2 Sheets-Sheet 1 N VENTOR. SAMUEL, M. BLAKE.

8) H/S'HTTORNEYS. HARE/5, KIECh Fosnse & HARRIS June 12, 1962 s, BLAKE 3,038,519

STEEL ROD SHEAR AND BENDER Filed Aug. 9, 1957 ilin;

519M usz. M. BLAKE.

ire tires Patented June 12, 1962 Free 3,038,519 STEEL RUB) SHEAR AND FENDER Samuel M. Blake, Paradise, Calii, assignor to Marks Development Corporation, Huntington Park, Califi, a corparation of California Filed Au 9, 1957. Ser. No. 677,322 Claims. (Cl. 153-2) This invention relates to a unitary device for cutting and bending steel rod.

Steel rod of relatively small diameter, for example up to diameter, is commonly used in the construction industry for reinforcing steel in concrete construction. Such rod, which normally comes from the mill in standard length, usually must be cut and bent to a variety of lengths and configurations to adapt it for use on the job. Heretofore, cutting with large, heavy shears has been difficult on the job and bending into sharp turns frequently impossible.

A primary object of this invention is to provide a relatively small and light portable tool which may be employed on a construction job to bend or cut, or both, such rod, which is fast in operation and requires no resetting to accommodate it to use on rod of a wide range of diameters within the limits for which my tool is built to accommodate.

A further object of the invention is to provide such a tool which is durable and strong and which may be used over long periods without replacement of parts.

Another object of the invention is to provide such a tool having few parts subject to wear in use, and in which the few wearable parts can be replaced readily without special tools or skill.

Other objects and advantages will appear from the following specification and the drawings, which are for the purpose of illustration only, and in which:

FIG. 1 is a perspective view of the tool of my invention in position for cutting;

FIG. 2 is an enlarged fragmentary end view taken on the line 2-2 of FIG. 1 and partly broken away to show some of the internal mechanism;

FIG. 3 is a vertical sectional view taken on the line 33 of FIG. 2;

FIG. 4 is a view similar to FIG. 2 but showing the parts in a different position of operation;

FIG. 5 is a perspective view similar to FIG. 1 but showing the opposite end of the tool, and illustrating the initiation of a bending operation; and

FIG. 6 is a view similar to FIG. 5 but showing a subsequent step in a bending operation.

Referring to the drawings, FIG. 1 shows a base member 16 having a housing 11 suitably secured thereto, as by bolts 12. As best shown in FIG. 3, the housing 11 is provided with a first bore 13 and a second bore 14, the first bore having a relatively small diameter and the second bore a relatively large diameter, the axes of the two bores being out of alignment so that one bore is eccentric to the other.

Extending into the second bore 14 is a body element 16, the body element being journaled in the bore on cylindrical roller bearings 17 circumferentially spaced around the body element and providing anti-friction means between the body element and the housing. An annular cap plate 18, formed in two halves as shown in FIG. 4, is secured to the housing 11 by means of screws 19, the cap plate extending into an annular groove 20 in the body element, the cap plate retaining the body element in the housing and retaining the roller bearings in place. Rigidly secured to the cap plate 18, by welding or otherwise, is an outwardly projecting stop element 22.

The body element 16 has an outer cylindrical portion 23 which, as best shown in FIGS. 2 and 4, is provided with radial sockets 24 and 25, and a bar 26. On the outer end of the body element 16 is a circular hub 27. Secured 011 the outer cylindrical portion 23 of the body element 16, as by welding or otherwise, is a bending dog 29 which, as best shown in FIGS. 5 and 6, extends outwardly over the hub 27.

Fitted into the first bore 13 of the housing 11 is a first bushing 34 and fitted into a counterbore 32 in the body element 16 is a second bushing 33, the bushings preferably being formed of hard tool steel. The first bushing 30 is retained in the housing 11 by means of a cover plate 34 secured to the housing as by screws 35. The body element 16 is also provided with a central axial bore 36.

Formed on the housing 11 are a pair of upstanding plates 38 and 39 which form a yoke between which is carried a roller 40 having an annular groove 41 on the periphery thereof and being supported by a crosspin 42 held in position by small pins 43.

When it is desired to employ my invention as a cutter, a rod 44 may be extended into the device as shown in FIGS. 1 and 3 to the desired position. The bar 26 is then inserted into one of its sockets 24 or 25 as shown and the bar is manually urged in a direction to rotate the body element 16 in the housing 11 from the position shown in FIGS. 2 and 3 to the position shown in FIG. 4 in which the bore of the second bushing 33 is entirely out of alignment with the bore of the first bushing 30. During this movement of the body element 16 the outer face of the second bushing 33 and the inner face of the first bushing 30 serve to shear and cut the rod 44 at the desired location. Due to this shearing action and the leverage that can be obtained through the bar 26 structural steel rod up to the full diameter of the bore 36 may be readily and quickly cut. Although the device may be made in various sizes to accommodate a wide range of bar stock, I have found that by making the bore 36 /8" in diameter the device will readily out most conventional structural steel rod employed. in construction work. The device may readily be disassembled to permit replacement of the bushings 3t! and 33 when worn, although if these bushings are made of hard tool steel as preferred they will operate over a long period of time without replacement.

When it is desired to bend a steel rod, the body element 16 is rotated to the position shown in FIG. 5 in which the bending dog 28 is in its lowermost position. The rod 44 to be bent is positioned as shown in FIG. 5 in which it is supported on the roller 40 in the annular groove 41 with the end of the rod being supported on the bending dog. In this position, the stop element 22 serves as an indexing stop for the bar 26 to insure that the bending dog is in the correct position for the start of the bending operation. Then, by applying force in a counterclockwise direction as seen in FIG. 5 to the bar 26, it is moved from the position shown in FIG. 5 to the position shown in FIG. 6 wrapping the outer end of the rod 44 around the hub 27. In either bending or cutting, the bar 26 may be moved from one of the radial sockets 24 or 25 to the other to permit easier access to the bar. After bending as shown in FIG. 6, the bent rod 44 may be simply lifted from the device for use. It will also be understood that although in FIGS. 5 and 6 I show a bend of substantially in operation the bend may be less or greater than this, as desired.

By reason of its small compact construction, the device of my invention is readily portable to and from a construction job Where it may be used to cut or bend steel rod. The device has a very simple construction with few wearing parts, is economical to build and operate, and

Wearing or Worn parts may be readily replaced on the job by workmen having no mechanical skill.

Although I have shown and described a preferred embodiment of the invention, it is to be understood that I do not desire to be limited to the exact construction but desire to be afforded the full scope of the following claims.

I claim as my invention:

1. In a device for bending and cutting rod-like members, the combination of:

a base member;

housing means rigidly secured to said base member, said housing means having a first bore and a second bore having an axis eccentric to the axis of said first bore;

body means rotatably mounted in said first bore and having an outer portion extending therefrom, said body means having a third bore therethrough adapted to be axially aligned With said second bore in one position of rotation of said body means relative to said housing means, said second and third bores being adaptedto receive a rod-like member to be cut;

a circular hub on said outer portion of said body means, said hub having a fourth bore axially aligned with said third bore and said hub being axially aligned with the axis of said body means;

a lug fixed to said outer portion of said body means and projecting radially outward therefrom;

roller means mounted on said base in radial alignment with said hub and radially spaced therefrom; and

means for rotating said body means.

2. In a device for bending and cutting rod-like members, the combination of:

a base member;

housing means rigidly secured to said base member, said housing means having a first bore and a second bore having an axis eccentric to the axis of said first bore;

body means rotatably mounted in said first bore and having an outer portion extending therefrom, said body means having a third bore therethrough adapted to be axially aligned with said second bore in one position of rotation of said body means relative to said housing means, said second and third bores being adapted to receive a rod-like member to be cut;

a circular hub on said outer portion of said body means, said hub having a fourth bore axially aligned with said third bore and said hub being axially aligned with the axis of said body means;

2. lug fixed to said outer portion of said body means and projecting radially outward therefrom;

roller means mounted on said base in radial alignment with said hub and radially spaced therefrom;

means for rotating said body means; and

stop means on said housing means and projecting into the path of rotation of said lug to limit the rotational movement of said body means.

3. In a device for bending and cutting rod-like members, the combination of:

a base member;

housing means rigidly secured to said base member, said housing means having a first bore and a second bore having an axis eccentric to the axis of said first bore;

body means rotatably mounted in said first bore and having an outer portion extending therefrom, said body means having a third bore therethrough adapted to be axially aligned with said second bore in one position of rotation of said body means relative to said housing means, said second and third bores being adapted to receive a rod-like member to be cut;

circumferential bearing means between said body means and said first bore;

a circular hub on said outer portion of said body means, said hub having a fourth bore axially aligned with said third bore and said hub being axially aligned with the axis of said body means;

a lug fixed to said outer portion of said body means and projecting radially outward therefrom;

roller means mounted on said base in radial alignment with said hub and radially spaced therefrom; and

means for rotating said body means.

4. In a device for bending and cutting rod-like members, the combination of a base member;

housing means rigidly secured to said base member, said housing means having a first bore and a second bore having an axis eccentric to the axis of said first bore;

a first tubular insert of hardened tool steel in said second bore;

body means rotatably mounted in said first bore and having an outer portion extending therefrom, said body means having a third bore therethrough adapted to be axially aligned with said second bore in one position of rotation of said body means relative to said housing means, said second and third bores being adapted to receive a rod-like member to be cut;

a second tubular insert of hardened tool steel in said third bore;

a circular hub on said outer portion of said body means, said hub having a fourth bore axially aligned with said third bore and said hub being axially aligned with the axis of said body means;

a lug fixed to said outer portion of said body means and projpecting radially outward therefrom;

roller means mounted on said base in radial alignment with said hub and radially spaced therefrom; and

means for rotating said body means.

5. In a device for bending and cutting rod-like memoers, the combination of:

a base member;

housing means rigidly secured to said base member, said housing means having a first bore and a second bore having an axis eccentric to the axis of said first bore;

body means rotatably mounted in said first bore and having an outer portion extending therefrom, said body means having a third bore therethrough adapted to be axially aligned with said second bore in one position of rotation of said body means relative to said housing means, said second and third bores being adapted to receive a rod-like member to be cut;

circular hub on said outer portion of said body means, said hub having a fourth bore axially aligned with said third bore and said hub being axially aligned with the axis of said body means;

lug fixed to said outer portion of said body means and projecting outwardly therefrom over said hub but radially spaced therefrom;

roller means mounted on said base in radial alignment with said hub and radially spaced therefrom;

means for rotating said body means; and

cap means adapted to close said housing.

References Cited in the file of this patent UNITED STATES PATENTS 79,089 Tyrell June 23, 1868 655,259 Miller Aug. 7, 1900 1,272,068 McClure et al. July 9, 1918 2,7 4. .Glickrna'n June 8, 19 57

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