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Publication numberUS1542355 A
Publication typeGrant
Publication dateJun 16, 1925
Filing dateMar 12, 1924
Priority dateMar 12, 1924
Publication numberUS 1542355 A, US 1542355A, US-A-1542355, US1542355 A, US1542355A
InventorsEugene Barker Guy
Original AssigneeEugene Barker Guy
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Pipe-bending apparatus
US 1542355 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)


Filed March 12 1924 llll llmmmmumi flg IN VEN TOR QZBQTKQ? A TTORNE YS Patented June 16, 1925.


1,542,355 PATENT "OFFICE.



Application filed March 12,1924. Serial No. 698,797. I

ratus, of which the following is a specificar tion.

-My present pipe bendingapparatus, more particularly to a'simple, inexpensive and readily ort1- able apparatus of this character, my ject being the provision of a hand device by means of which pipe may be bent easily and quickly at various angles without flattening or pinching the pipe, and a further object is the provision of adevice of this character capable of ready adjustment for different angles and having means whereby pipe may be quickly engaged and just as readily released.

In the accompanying drawing which illustrates my present invention and forming a part of this specification; s

Figure 1 isa perspective view of the complete device, illustrating its practical application,

Fig. 2 is atop plan view illustratingthe position of the parts upon initial engagement with the pipe to be bent,

' Fig. 3 is a top plan view illustrating the position of the parts at the completion of a ri ht angle ben fig. 4 is a vertical section through a portion of the device taken substantially on the line 4-4 of Fig. :2, A I Fig. 5 is a detail perspective view of the pipe gripping and-bending segment,

Fig. (Sis a detail vertical section through the adjustable st0p, taken on the line 6-6 of Fig. 2, and

Fig. 7 is a detail vertical section'through the adjustable roller pipe guide or abutment, taken substantially on the line 77 of Fig. 2.

. Referring now to these figures, my improved apparatus includes a base 10 which may in practice be suitably attached to a workbench or other support upon which there is horizontally mounted a pair of intermeshing gear members 11 and 12, the latter disposed approximately at the center of the base-10 for rotation around an upright post or journal 13 and being of suitably reater proportions than the gear 11, the Fitter of whichis mounted upon an upright invention relates generally to post or journal 14 and has a polygonal upper extension 15 for the reception of a conformably shaped wrench 16 which with its handle 17 constitutes the means whereby the gear 11 may be manually rotated and rotative movement in this way conveyed or imparted to the larger or main gearl2.

A pipeengaging and bending segment 18 whose inner curvature at least conforms to the periphery of the main gear 12, is provided upon. its'inner or concaved face with teeth 19 and 20 located adjacent to opposite ends thereof, to interfit the teeth of the main gear 12. The outer surface or convex face of the segment 18 presents small longitudinal groove 21 for the reception of a pipe 22 to be bent, as in Figs. 1 and 3, the segment having intermediate its ends an angularly offset and vertically flanged pipe-gripping extension 23, between the inner surface of the flange of which and the convex face of the segment just sufficient room exists for the reception of the pipe 22 with the segmentin the position shown in Fig. 2 where its said pipe-gripping extension projects therefrom at right angles to the plane in which the pipe is initially inserted for the bending operation.

At one side of the base 10 and at the 0pposite side of the main gear 12 with respect to the actuating gear 11, a clamping bolt 24: rises from the said base through the longitudinally slotted h0lder25 of a guide roller 26 which in the bending operation forms an abutment for the pipe to be bent, this guide roller 26 being mounted vertically upon a post 27 rising from the holder 25.

Atthe other side of the main gear 12 and adjacent to the actuating gear 11 a stop member 28, which is lengthwise slotted, as at 29, is adjustably held in place by a screw 2 30 which threads in connection with the base 10 as seen particularly in Figs. 2, 3 and 6, this stop member being engageable by the forward end of the segment 18 with respect to the direction of its operative movement, so as to adjustably limit the extent to which the pipe is bent.

' The parts as set in Figs. 1 and 2 are for a right'angle bend of the pipe 22 and after the segment 18 is set in the position of Fig. 2 with its pipe-gripping extension 23 adjacent to the guide roller 26, it is free to receive the pipe 22 between its outer face at one end of its groove 21 and its vertically flanged gripping extension 23, the pipebeing disposed against the inner face of the guide roller 26. By then rotating the actuating gear '11 clockwise by means of the wrench 16 and handle 17, counter-clockwise movement is imparted to the main .gear 12, and as this movement progressesthe pipe will be gripped by the extension 23 and the bending operation will start, as in Fig. 1,the pipe being carried lengthwise with the bending segment. During this movement, the roller 26 forms an abutment to prevent the pipe from swinging 01f of the base 10 although at the same time it permits the pipe to readily move lengthwise. As the bend ing operation continues, the pipe will be bent to the desired point and if a right angle bend is desiredthe stop 28 is set as in 3 so that when engaged by the forward end of the segment 18, as shown in this figure, a true right angular bend will be formed in the pipe 22." It is then only necessary to rotate the parts in a reverse direction until the original position of Fi 2 has been reached when the properly bent pipe may be easily lifted out of the machine, it being .obvious that in this latter movement for the purpose of freeing the pipe, the pipe is at liberty to swing inwardly away from the guide roller or abutment 26. It is, furthermore, obvious that by adjusting the guide roller or abutment 26, as well as the stop member 28, the degree of curvature or bend of the pipe may be readily controlled, and it is likewise obvious that in its bending, pinching or flattening of the pipe will be avoided owing to the uniform even engagement of the bending segment with the work, and the gradual fi'exure of the work during the bending operation. a

My invention thus provides a machine of the type specified which is simple, strong and durable, which permits of effective operation and uniform results, and which is not only inexpensive in the first instance, but with ordinary care will operate thereafter without expense. K

It is also obvious that in view ofthe manner of engaging and supporting the segment in connection with the main gear, segments of different shapes and sizes may be employed, depending uponv the size and character of the pipe to be bent as well as the particular shape of the bend desired, and that a variety of such segments are adapted for ready interchangeable association with the main gear in the manner specified.

I claim:

1. A device for manually bending pipe consisting of a main gear and an actuating gear in intermeshing relation, the latter having means providing for its manual rotation, apipe bending segment associated with and conforming to the peripheral curvature of the main gear and having teeth upon its inner face engageable with the. teeth of said gear at spaced points of the latter, a pipegripping member carried by said segment, and a pipe guide adjacent to the main gear forming an abutment for the pipe during the bending operation.

2. A pipe-bending machine consisting of a support, a gear mounted to rotate fiatwise on the support, an actuator for said gear, an externally grooved and internally toothed bending segment detachably in association with said gear having a pipe-gripping element, a pipe-engaging abutment mounted on said support adjacent to one side of the gear, and a stop member on the support approximately diametrically opposite to said abutment for engagement by the forward end of the segment in its rotation with the gear.

3. A pipe-bending machine consisting of a support, a gear mounted to rotate flatwise on the support, an actuator for said gear, an externally grooved and internally toothed bending segment detachably in association with saidgear having a fipe-gripping element, a pipe-engaging abutment mounted on said supportadjacent to one side of the gear, a stop member on the support approximately diametrically opposite to said abutment for engagement by the forward end of the segment in its rotation with the gear, the said abutment and said stop member being adjustable on the support, for the purpose described.


Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US5345803 *Aug 30, 1993Sep 13, 1994General Electric CompanyAdjustable tube bending method and apparatus
U.S. Classification72/157
International ClassificationB21D7/024, B21D7/02
Cooperative ClassificationB21D7/024
European ClassificationB21D7/024