US2556974A - Pipe cutter - Google Patents

Description

June l2, 1951 H G, NYE, JR 2,556,974

PIPE CUTTER Filed April 29. 1949 Patented June 12, 1951 UNITED STATES PIPE CUTTER Harry G. Nye, Jr., Chicago, Ill., assignor to Nye Tool Company Application April 29, 1949, Serial N0. 90,472

This invention relates to tools for cutting pipe or rods, and more particularly to special guiderollers for keeping the cutter in perpendicular relation to the stock being worked upon. rllhis application is a continuation-in-part of my copending application Serial No. 81,135, filed March 12, 1949, and now abandoned.

Conventional pipe cutters usually have a C frame which has a fixed jaw at one end and a hand operated screw is provided at the other end. The screw bears against a movable jaw which is either slidably mounted on or pivoted to the frame. The cutter is mounted in one of the jaws, and a pair of rollers in the other, which forms a gripping space for the pipe. The cutter usually is in the form of a sharpened wheel, but in some cases a fixed blade is used.

It is important that the cutter be kept at right angles to the Work, as otherwise there is danger of cutting helical grooves when the tool is turned about the work, or the work is rotated in the tool.

The primary object of the present invention is to provide one or two guide-rollers outside of the jaw, so that, when the'hand screw is tightened up, the tool automatically takes the proper perpendicular position. If two outrigged guiderollers are used on opposite sides of the jaw they may both be coaxial `with either of the conventional rollers, or each may be coaxial with one of the conventional rollers. Alternatively, one of the conventional rollers may be eliminated from the tool, in which case the outrigged guide-rollers will normally be coaxialr with one another but not with the one conventional roller. This feature greatly speeds the operation of setting up for a cut, particularly where the pipe is power driven. The screw may be turned in as tightly as the operator wishes, and the turning torque will not cause it to jump out of the cut. The pipe does not have to be perfectly cylindrical, and a coarser thread may be used on the adjusting screw than has heretofore been the practice.

Another object of the invention is to provide a tool which may be used for either right or left handed cuts. This is accomplished by having outrigged rollers on both sides of the jaw.

The invention is illustrated in a preferred and an alternative embodiment in the accompanying drawings, in which:

Figure l is a fragmentary side elevational View of a pipe cutter embodying the invention; Fig. 2, a front elevational view of the same; Fig, 3, a top plan View; Fig. 4, an enlarged fragmentary front elevational View, similar to Fig. 2; Fig. 5, a sectional view, taken as indicated at line 5 5 of Fig. 4; and Fig. 6, a fragmentary sectional view, taken as indicated at line B- of Fig. 5.

In the preferred embodiment illustrated in Figs. 1 to 6, the pipe cutting tool has a conventional C frame 'I having a jaw 8 at its upper end, in which a cutter Wheel 9 is journalled. The frame makes 1 Claim. (Cl. 311-101) a threaded connection at its lower end I0 with a handle member I I which bears against a movable jaw l2 which is slidably mounted on the frame 1. A rear roller I3 is journalled on a shaft Id in the movable jaw, and has a head with side flats which fit into a socket in the movable jaw, so that the shaft Will not turn. By this arrangement there is no wear beween the shaft and movable jaw, and the shaft and roller may be replaced when worn out.

A front roller l5 is journalled in the jaw I2 on a special shaft i6 which has an integrally formed collar Il fitting into a socket I8 in the jaw I2 to prevent rotation. The shaft I8 extends outwardly beyond the movable jaw l2 a sufficient distance to receive at each end special outrigged guiderollers I9 which are held on the shaft by conventional means Sueh as the snap rings 20 which fit into grooves provided near the ends of the shaft. Preferably, the rollers 9, I5 and i9 are made of hardened steel. The rollers I5 and I9 are of the same diameter so that when the tool is applied to piece of pipe, it immediately disposes the cutter wheel I9 perpendicular to the axis of the pipe.

The foregoing detailed description is given for clearness of understanding only, and no unnecessary limitations should be understood therefrom, for some modications will be obvious to those skilled in the art.

I claim:

A pipe cutting tool, comprising: a body provided With a xed jaw; a movable jaw mounted on said body for movement toward and away from said fixed jaw; an adjusting member making threaded engagement with said body for moving said movable jaw; a cutter wheel mounted in one of said jaws; a first roller shaft mounted in the other jaw having a single roller thereon within the jaw; a second roller shaft parallel to said first roller shaft and extending outwardly beyond the jaw; and rthree guide rollers of equal diameter on said second shaft at least two of which are outside the jaw and one of which is Within the jaw and lies in the Plane of the cutter wheel, said last mentioned roller being adapted to contact the pipe along the line of the cut made by the cutter.

HARRY G. NYE, JR.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,215,120 Cramer Feb, 6, 1917 1,215,121 Cramer Feb. 6, 1917 1,681,807 Kenerson Aug. 21, 1928 FOREIGN PATENTS Number Country Date 23,607 Great Britain Oct. 16, 1917

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