US2242135A - Pipe bending device - Google Patents

Description

Patented May 13, 1941 N i i E STAT E S T'- Ql? F 1 6E PEPE BENDING DEVICE Howard A. Mertz, Ponca City, Okla, assi'gnor to Continental Oil Company, Ponca City, Okla, a corporation of Delaware Application June 3, 1940, SeriaLNo. 338,563-

7 Claims.

My invention relates to a pipe bending device and more particularly to a portable device for bending pipes along any desired curvature.

One object of my invention is to provide a device for bending pipes.

Anotherobject of my invention is to provide a portable device for forming pipe sections into curves of any desired radius.

Other and further objects of my invention will appear from the following description.

In the accompanying drawing which forms part of the instant specification and is to be read in conjunction therewith and in which like reference numerals are used to indicate like parts in the various views;

Figure 1 is an elevation of a device showing one embodiment of my invention.

Figure 2 is a top plan view of a pipe bending device shown in Figure 1.

Figure 3 is an end view of the pipe bending device shown in Figure 1.

Referring now to the drawing, the device is mounted on a suitable base I, which is provided with openings 2 so that it may be bolted to any desired support. A frame comprising a pair of plates 3 and 4 are pivotally mounted in the base I by means of a shaft 5, the frame plates 3 and 4 being held in position by collars 6 and l and pins 8 and 9, as can readily be seen by reference to Figure 3. A cross member ID is secured to both plates 3 and 4. Two roller sheaves II and I2 are secured to shafts l3 and M respectively. The shafts are journalled in the frame plates 3 and 4. A collar is pinned to shaft I3 by means of pin It. The other end of shaft l3 which projects through plate 4 carries a pinion ll, keyed to the shaft I3 by means of key l8. A shaft I9 is mounted for rotation in the frame above the shaft M. The end of shaft I9, which projects through plate 3, carries a gear wheel 20, which meshes with pinions 2| and 22, secured to stub shafts 23 and 24, having squared ends. I The end of shaft H] which projects through frame plate 4, has keyed thereto by means of key 25, a sprocket wheel 26. A sprocket chain 21 passes around sprocket wheel I! and sprocket wheel 26. The gear wheel meshes with a gear wheel 28, which is keyed to shaft M. The stub shafts 23 and 24 are mounted between frame plate 3 and a bracket plate 29 which is secured to the frame plate 3 by means of stud bolts 33. An operating crank 31 fitted with a socket 32, adapted to fit the squared ends of the stub shafts and provided with a handle 33 is adapted to rotate the pinion with the shaft to which it is engaged.

Suitable bearings :33 and 34 are mounted on the base i. A' shaft 35 is journaled in the bearings and carries a grooved sheave 36-. The roller sheaves l land [2 are provided with serrations 31, enabling them to frictionally engage-a pipe to be bent. Mounted on the base i is a suitable jack such as a screw jack 38', the movable portion of which 39engages the cross member Ill of the frame. The'jack is adapted-to be operated by meansof an operating arm inserted inopenings alas is well known to the art.

In operation, thejack headz39 is lowered and the pipe il to be bent-is inserted through the rollers 50 that rollers 36 and H are on one-side and roller [2 is on the other side of the pipe. The jack 38 is then operated'to rotate the frame around its shaft 5 so that the pipe is bent to the desired curvature. Any desired length of the pipe may then be bent tothe predetermined curvature by operating the crank 3|. It is understood, of course, that any suitable operating means may be provided. The operating means, for example, may be a powered means driven by an electric motor. In event a power driven means is used, its rotation will be in the same direction. It is for this reason that I provide two pinions 2| and 22 so that the gear 20 may be driven in either direction, depending on whether it is desired to feed the pipe to the right or to the left with respect to roller sheave 31.

It will be seen that I have accomplished the objects of my invention. I have provided a portable pipe bending device in which pipes may be bent to any desired radius and, if desired, reverse or 8 curves may be made.

It will be understood that certain features and sub-combinations are of utility and may be employed without reference to other features and sub-combinations. This is contemplated by and is within the scope of my claims. It is further obvious that various changes may be made in details within the scope of my claims without departing from the spirit of my invention. It is, therefore, to be understood that my invention is not to be limited to the specific details shown and described.

Having thus described my invention, I claim:

1. A pipe bending device including in combinaxtion a base, a frame, means for pivotally mounting said frame on said base, a pair of rollers mounted in said frame, a roller mounted on said base, means for rotating one of said rollers and means for pivoting said frame to a desired position.

2. A pipe bending device including in combine,

tion a base, a frame, means for pivotally mountting said frame on said base, means for rotating said frame around its pivot, a first roller carried by said frame, a second roller carried by said base, a third roller carried by said frame intermediate said first and second rollers, and means for rotating one of said rollers.

3. A pipe bending device including in combination a base, a frame, means for pivotally mounting said frame on said base, means for rotating said frame around its pivot, a first roller carried by said frame, a second roller carried by said base, a third roller carried by said frame intermediate said first and second rollers, and means for rotating said first and third rollers.

4. A pipe bending device including in combination a base, a frame, means for pivotally mounting said frame on said base, means for rotating said frame around its pivot, a first roller carried by said frame, a second roller carried by said base, a third roller carried by said frame intermediate said first and second rollers, and means for rotating said first and third rollers, said first and third rollers being provided with roughened surfaces adapted to frictionally engage the pipe to be bent.

5. A pipe bending device including in combination a base, a frame, means for pivotally mounting said frame on said base, a jack for pivoting said frame around its pivot, a first roller rotatably mounted in said frame, a second roller rotatably mounted on said base, a third roller rotatably mounted on said frame intermediate said first and second'rollers, said third roller being keyed to a shaft, a gear wheel mounted on said shaft, 7

and means for rotating said gear wheel.

6. A pipe bending device including in combination a base, a frame, means for pivotally mounting said frame on said base, a jack for pivoting said frame around its pivot, a first roller rotatably mounted in said frame, a second roller rotatably mounted on said base, a third roller rotatably mounted on said frame intermediate said first and second rollers, said third roller being keyed to a shaft, a gear wheel mounted on said shaft, an idler shaft mounted for rotation in said frame, a gear wheel on said idler shaft, meshing with the gear wheel on said roller shaft, a pinion engaging said idler gear, and means for rotating said pinion.

7. A pipe bending device including in combination a base, a frame, means for pivotally mounting said frame on said base, a jack for pivoting said frame around its pivot, a first roller rotatably mounted in said frame, a second roller r0- tatably mounted on said base, a third roller rotatably mounted on said frame intermediate said first and second rollers, said third roller being keyed to a shaft, a gear wheel mounted on said shaft, an idler shaft mounted for rotation in said frame, a gear wheel on said idler shaft, meshing with the gear wheel on said roller shaft, a pinion engaging said idler gear, a sprocket wheel mounted on said idler shaft, a shaft for said first roller, a sprocket wheel mounted on said first roller shaft, a sprocket chain interconnecting said sprocket wheels, and means for rotating said pinion.

HOWARD A. MERTZ.

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