US 2630033 A
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Description (OCR text may contain errors)
March 3, 1953 OLIN STOVER 2,630,033
NOW BY CHANGE OF NAME SMOKEY OLIN STOVER TUBE BENDING TOOL Filed July 1, 1949 ENTOR. $1
NOW BY CHANGE OF NAME SMOKEY oLm s-rovsz Patented Mar. 3, 1953 TUBE BENDING TOOL OlinJStover, Washington, D. 0., now by change of name Smokey Olin Stover Application'Julyl, 1949, Serial No. 102,562
This invention relates a system and apparatus for bending tubing, and in particular comprises an arrangement of marks on tubing benders and lines on the tubing whereby an operator of the bender can make perfect bends in relation to one another on the tubing.
More specifically it is an object to provide a system of marks on the bender and lines on the tubing so that an inexperienced operator of the hand bender knows the proper position in which to place the tubing in the bender in order to make 90 bends at right angles to one another, offsets, 45 bend and other types of bends normally used in installing tubing in construction work.
According to this invention an operator of a hand bender using this system could at the first attempt make perfect bends in tubing, thereby saving the time and material usually Wasted in training an operator to bend tubing by hand. Also, it reduces the amount of time it takes an experienced operator using the old type of benders to make perfect bends in tubing.
These and other objects and advantages I attain by the construction shown in the accompanying drawing wherein, for the purpose of illustration, I have shown a preferred embodiment of my invention and wherein:
Fig. l is a side view in horizontal elevation of the hand. bender with a section of tubing partly bent.
Fig. 2 is a front view of the hand bender with the two marks A and B on the bender in the same plane and showing a cross section of the tubing in the bender.
Fig. 3 is a front cross sectional view of the hand bender taken on. line 33 of Fig. 1 showing the aligned tubing before making an offset bend.
Fig. 4 is a bottom view of the hand bender showing the hook holding means of the bender and the aligned tubing which when bent to the proper angle makes a perfect offset in the tubing.
Fig. 5 is a cross sectional view of the tubing showing typical lines I, 2, 3 and 4 circumferentially spaced 90 from one another for proper bending of the tubing.
Fig. 6 is the left side view of the tubing in Fig. 5 and showing lines I and 2 parallel and on the periphery.
Fig. '7 is a right side view of the tubing in Fig. 5 and showing lines 3 and 4 parallel and on the periphery.
The bender may be of generally conventional construction and that disclosed herein is typical. It comprises a handle I0, to which is connected the bender per se. The bender comprises a central substantially hollow shaft-like receiving section II in which the handle Iii is adapted to be inserted. At the base of section II ther is provided a rim like arcuate portion I2 extending in opposite directions from sectionI-I. A groove I3 is provided in the face of portion I2 and into which the tubing to be bent is placed. Webs I4 and I5 extend from section II to portion I2 for the purpose of reenforcement. Extending from web I5 is a hook means I6 adapted to encircle the tubing when placed in registry with the bender prior to a bending operation.
According to the system of the invention arrows, identified as A and B, or similar marks, are provided on web I5 at the end thereof abuttin groove I3 as shown in Fig. 3 and on the back of hook I6, as shown in Fig. 4, respectively. Also, the tubing is marked along its length with parallel lines I, 2, 3 and 4, spaced ninety degrees from each other about the periphery of the tubing.
In making an offset type of bend, tubing is placed within the bender in such manner that line I is in registry with arrow A and thus line 3 is in registry with arrow B. The tubing is then bent and rotated 180 and is aligned so that line I is in registry with arrow B. and line 3 with arrow A. The tubing is then bent back to the original angle.
From this description it is now believed apparent to one skilled in the art that the tubing can be bent to any desired angle or to any desired configuration by the system of this invention.
For example, to make two bends at right angles to each other, place the tubing in the bender with arrow A. aligned with line I operating the bender until a 90 bend is formed. Then sliding the bender down the required distance on the tubing, place arrow A of the bender on line 2 for a 90 left, or line 4 for a 90 right, and proceed to form the bend as above.
While only one type of hand bender and one size of tubing are shown in the accompany drawing, this system of marks on the bender and lines on the tubing are adaptable to any type of bender and any size tubing.
It becomes apparent from the foregoing description and drawing that this system saves considerable time in. the process of bending tubing, and the lines on the tubing and marks on the bender are of considerable help in making other difficult bends.
Obviously, a system of this character provides a cheap and easily made bend of all types with a minimum of experience and tools.
It will also be obvious that this construction is capable of some modification without in any manner departing from the spirit of my invention; I accordingly do not wish to be understood as limiting myself to the particular arrangement herein disclosed except as herein claimed.
A tube bender having an arcuate portion with a groove therein adapted to receive the tubing to be bent and hook means for grasping the tubing, identification marks on the arcuate portion, identification marks on the hook means, said identification marks being located in the same bending plane, for bending tubing having straight parallel lines extending along the length thereof and arranged about the outer periphery thereof, whereby said tubing is adapted for arrangement within said bender so that at least one pair of lines 180 apart are in registry with said identification marks prior to the tube bending operation.
REFERENCES CITED The following references are of record in the file of this patent:
Number 20 Number UNITED STATES PATENTS Name Date Lloyd Apr. 11, 1916 Greenfield June 22, 1920 Jones Apr. 17, 1923 Webber Aug. 7, 1928 Allen Ma 7, 1929 Johnson June 10, 1930 Johnson Aug. 12, 1930 Henry July 28, 1931 Meighan May 24, 1932 Kepler Sept. 3, 1946 McIntosh Sept. 30, 1947 Pearson Feb. 24, 1948 Lampert Dec. 21, 1948 Snyder Mar. 8, 1949 FOREIGN PATENTS Country Date Germany Jan. 15, 1926 France Oct. 13, 1941