DE129639C - - Google Patents

Description

PATENT OFFICE.

Λ * 129639 CLASS 49 d.

The present invention relates to a pipe cutter, the cutting knife by a previous cutting wheel is inevitably guided and its tensioning lever with it a spiral spring is provided.

Although pipe cutters with guide wheels are now known, the present one offers Pipe cutter compared to the following significant advantages and deviations : The wheel with a short cutting edge cuts the pipe or round iron to be cut in a slight groove and forces the knife that attacks the second turn, that of the small wheel to follow the prescribed line. This results in a straight cut; further is wring the knife through the wheel, only to take a certain chip size, because, as soon as the small cutting edge of the wheel has penetrated, the wheel goes a deeper one prevents the knife from getting stuck. This also achieves that the knife does not reach through at the final average and therefore an impeccable one smooth section takes place. The slight pre-cutting of the wheel is the next Knife makes the work much easier, because the same thing when cutting two chips which strive for the open center and avoid unnecessary friction. Since that Wheels only allow a certain cutting thickness, so is the tensioning screw of the guide lever provided with a spiral spring, so that the pipe cutter is only tensioned once is required for the duration of the clipping. This spring also ensures that the on the cut off Pipes, for example, do not constitute an obstacle to permanent chips, as the spring does so Evasion permitted. A major advantage over other pipe cutters also consists in the fact that there is no change in shape or ripening of what is to be cut through Rohres takes place, even the flats and bumps that are often present in the object to be cut are no obstacle form. Every locksmith can easily replace the knife. The annoying burr, which can only be removed by filing, is almost completely eliminated. The pipe cutter works very easily and can therefore also be used without oil lubrication, which is the case with flanged disks or flanging is very beneficial.

It is thus a significant advance in the field of tube and round table cutting achieved in a peculiar way.

The pipe cutter shown in the accompanying drawing essentially consists of following parts:

A a flat iron bracket, which has gas threads at the ends, onto which pipe ends J are screwed to extend,

B guide wheel with protruding cutting edge,

C clamping bracket containing the Führüngs- Vorschnitträdchen and D, the diameter D and which serves to support the knife steel jaw K,

H screw for fastening the knife,
F clamping screw with spiral spring G,
L loose disc, which gives the spiral spring a straight support.

The pipe cutter is handled as follows:

After the clip has been placed around the pipe to be cut and the clamping screw F has been tightened, the pipe cutter is pulled once around the object to be cut; the groove pre-cut by the wheel in this case leads the knife that is now attacking inevitably to the groove.

The knife will now cut to the same depth as the pre-cut wheel so that the wheel makes it easier for the knife to cut.

During the last circling, the cutting edge of the wheel is pressed down to the smooth one Edge and gives guidance until the knife has removed the last burr and the cut object falls apart.

Claims (1)

Patent claim: Pipe cutter with a guide wheel in front of the cutting knife, characterized in that the guide wheel (D) is designed as a cutting wheel and that the knife (E) and cutting wheel (D) are firmly mounted in a bracket (C) which is resiliently pressed against the pipe to be cut, so that the knife is always forced to take a chip of the same size and that a smooth cutting of the pipe is guaranteed. For this purpose ι sheet of drawings.