US1679470A

US1679470A - Pipe cutter

Info

Publication number: US1679470A
Application number: US172581A
Authority: US
Inventors: Louis H Goeltz
Original assignee: Individual
Current assignee: Individual
Priority date: 1927-03-04
Filing date: 1927-03-04
Publication date: 1928-08-07
Anticipated expiration: 1945-08-07

Description

Aug. 7, 1928.

L. H. GOELTZ PIPE CUTTER Filed March 4, 1927 til Patented Aug. 7, 1928.

UNITED STATES LOUIS H. GOELTZ, OF MILWAUKEE, WISCONSIN.

PIPE CUTTER.

Application filed March 4, 1927. Serial No. 172,581.

This invention relates toan improvement in pipe cutters and is especially designed and adapted for use in cutting the various sizes of iron pipe, which under the present practice are cut by hand by means of a hammer and chisel. The present method of cutting pipe of this character is laborious, tedious and time consuming and often results in an uneven or non-circular cut.

One of the principal objects of the present invention is to provide a pipe cutter des gned for this class of work which greatly facilitates and speeds up pipe cutting operation while insuring a true and straight or circular cut. A further object is to provide a pipe cutter having these advantages and capacities and which is of simple, durable and rugged construction, which is reliable and speedy in operation, which is adjustable for use on various sizes of pipe and which may be manufactured at a comparatively slight expense from materials and by means of facilities ordinarily available.

In carrying out the present invention a support or base is provided and has a substantially V-shaped seat on each side of which a post is provided. In the faces of the seat, spring projected pipe supporting rollers are mounted and between these rollers a stationary lower chisel is arranged. One of the posts has a series of pairs of fulcrums thereon with which an adjustable chisel carrier is selectively engaged. The chisel carrier is guided in operation by the other post and between the posts it supports a movable chisel. The movable and stationary chisels are opposed. With this arrangement, with the pipe to be cut supported on the rollers of the seat and between the chisels, the chisel carrier may be grasped by one hand and the movable chisel struck with a hammer, whereupon both chisels simultaneously cut into the pipe. The knee of the operator may be used to rotate the pipe in order to carry out the cutting action around the circumference thereof. It may be desirable to provide an auxiliary support with a V- shaped seat and rollers, but without the chisel at a spaced point in order to keep the pipe with its axis at right angles to the plane of cut and thereby insure easy rotation of the pipe and a true and straight cut.

Other objects and advantages reside in certain novel features of the construction, arrangement and combination of parts which particularly Figure 1 is a view in front elevation showing a pipe cutter embodying the present invention.

Figure 2 is a view in horizontal section on line 2-2 of Figure 1.

Figure 3 is a View insection on line 33 of Figure 1.

Figure 4 is a fragmentary View in top plan showing the carrier for a movable chisel.

Figure 5 is of the stationary chisel.

Figure 6 is a similar View of the movable chisel, and Figure 7 is a view showing the auxiliary support provided for the pipe.

Referring to the drawing, wherein for the sake of illustration is shown one embodiment of the invention, numeral 1 designates generally a support or base having openings 2 therein whereby it may be secured to the bench or to any other suitable supporting structure. Integral with the base 1 is a body portion 3 having its upper end of V-shaped form to provide a substantially ,V-shaped seat or fioor 4. At the sides of the body a detailed perspective view portion 3 posts 5 and 6 are provided and may be integral with the body portion 3 and with the base. It is to be understood that while these parts are shown and described as integral for the sake of simplicity in illustration, they may be made separate and suitably secured together.

Recesses 7 are provided in the body portion 3, there being at least one such recess extending out through each inclined face of the seat 4. Below each recess 7 a guide opening 8 is provided, and a roller carrying frame 9 is mounted in each recess 4 and has a depending guide stud 10 slidably fitted in the interlined guide opening 8. The

lllll recess 7 and the roller carrying frames 9 are preferably of rectangular formso that the recesses 7 and frames 9 coact to constrain the frames to sliding movement. This guiding action is furthered by the cooperation llli) of the studs 10 and guide openings 8 which llo' bearing arms 11 receiving a pin 12 on which a roller 13 is loosely mounted. The pins 12 have friction or driving fits in the openings of their bearing arms. Below each stud a compression coil spring 14 is provided, each spring 14 having its upper end engaging its stud 10 and having its lower end engaging the bottom of its opening 8. 1

In between the recess 7 and the inclined faces of the seat 1, the body 3 has a recess 15 and at the center of the body an opening 16 is provided, the opening 16 extending from the bottom of the recess 15 down through the body 3 and through the base 1. In the recess 15 a fixed chisel or cutter 17 is provided, this chisel or cutter 17 having a cutting edge 18 and a fiat base 19 which rests on the bottom of the recess 15. The chisel 17 also has a dependingstud 20 which may be integral therewith rigidly connected thereto, the stud 20 fitting in the opening 16. The opening 16 anal stud 20 are non-circular in cross section so as to coact with the body of the chisel and the recess 15 to prevent the chisel 17 from twisting or turning. Movement of the chisel longitudinally in the recess 15 is prevented by the stud 20 and its opening 16.

The post 6 is provided with a series pairs of lugs 21, each pair of lugs providing a fulcrum. As shown in Figure 3 the members of each pair of lugs are on the opposite sides of the post and are horizontally lined. Each pair of lugs is located at a different vertical height, that is, at a different distance from the seat 4-. The ends of the lugs adjacent to seat 4 are beveled oil" as indicated at 21. A chisel carrier 22 is provided and comprises a pair of bars 23 having spaced portions 23 and handle portions 23*, the handle portions flatly engaging each other and being held together by bolts and nuts 24. The portions 23 are maintained in properly spaced relation by means of a bolt and nut assembly 25 and a spacing sleeve 26, the spacing sleeve 26 encircling the bolt of the bolt and nut assembly 25 between the spaced portions 23 of the bars 23. A chisel 26 is clamped between the spaced portions 23 of the bars 23 by means of bolts 27 and nuts 28. If desired, the chisel 26 may have series of grooves or serrations on opposite faces thereof and in these serrations portions of the bolts 27 fit to positively connect the chisel 26 and its carrier 22. The chisel 26 has a cutting edge 30 and an impact head 31. By providing a plurality of grooves and serrations 29 the chisel 26 may be mounted in any one of plurality of positions or adjustments on its carrier. The ends of the bars 23 opposite the handle portions thereof are formed with notches 32 providing bars or seats to coact with the fulcrum lugs 21. 1 One wall of each notch 32 may be beveled off as indicated at 32" to facilitate engagement of the notches with any set of fulcrum lugs.

In practice the pipe is placed between the posts 5 and 6 and rests on the rollers 13 am chisel 17, as illustrated in Figure 1. During the positioning of the pipe the carrier 22 may be removed so that the pipe can be dropped down between the posts although. of course, the pipe can be introduced endwise between the posts and below the carrier if desired. The carrier has its notches engaged with the proper fulcrum 21 for the size of pipe to he cut. Thus. as shown in Figure 1, the carrier is mounted on the uppermost set of lugs 21, but if smaller sizes 01" pipe were to be out then the carrier would be mounted on one of the lower sets of lugs. \Vhen so mounted, the carrier is free to swing about the lugs as a fulcrum. 3y virtue of the coaction of its roller sleeve 26 with the post 5, end-wise displacement of the carrier from its fulcrum lugs is prevented. It may be desirable to support the pipe at a point spaced from the pipe cutter by utilizing an auxiliary support such as shown in Figure 7, and which auxiliary support comprises a base 1, and body 3, post 5 and 6 and spring supported rollers 13. In other words, the auxiliary support is the same as the cutter with the chisels and the movable chisel carrier omitted. The operator carries out the cutting act by grasping the chisel carrier 22 with one hand and striking the head 31 of the chisel 26 with a hammer grasped by the other hand. The pipe may be rotated by the knee of the operator as rotation is easily imparted thereto due to the roller support. The rollers and the two chisels-tend to prevent axial displacement of the pipe and thus the cut extends around in a true circle. The speed with which the cut may be completed is materially enhanced by virtue of the fact that two chisels operate to cut the pipe upon each blow of the hammer. Different sizes of pipe may he cut by merely shifting the carrier 22 to different fulcrums. The rollers 13 are automatically projected to engage the various sizes of the pipe.

The invention claimed is:

1. A pipe cutter comprising cooperable chisels and means for centering the pipe between the chisels, including a pair of spring projected rollers.

2. A pipe cutter comprising cooperable chisels and means for centering the pipe between the chisels, including a pair of spring projected rollers, said rollers being angled with respect to one of the chisels.

3. A pipe cutter comprising a base, a fixed chisel projecting upwardly therefrom at the center of the base, means for centering the pipe over said chisel, a pair of posts extending upwardly from the base of the body,

III)

a, chisel on one of said posts, means on the chisel carrier coacting with the other postfor constraining the chisel carrier to proper movements, and a movable chisel connected to said chisel carrier.

5. A pipe cutter comprising a base, a fixed chisel projecting upwardly from the base, means for centering the pipe over said fixed chisel, posts extending up from the body and base, a movable chisel carrier, means for adjustably mounting the movable chisel on one of said posts, means on the chisel carrier coacting with the other post for constraining the chisel carrier to proper movements, a movable chisel, and means for adjustably mounting the movable chisel on the chisel carrier.

6. A pipe cutter comprising a base, a fixed chisel projecting above the base, means for centering the pipe on said base, posts extending above the base and seat, a chisel carrier having spaced portions embracing said posts, means for adjustably connecting one end of the carrier to one of the posts, means extending between the spaced portions and cooperating with the other post for preventing endwise displacement of the carrier, and a movable chisel connected to said carrier.

7. A pipe cutter comprising a base, a fixed chisel projecting above the base, means for centering the pipe on said base, posts extending above the base and seat, a chisel carrier having spaced portions embracing said posts, means for adjustably connecting one end of the carrier to one of the posts, and a movable chisel connected to said carrier.

8. A pipe cutter comprising a base, a fixed chisel projecting upwardly from the base,

rollers engageable with the pipe for centering the same over the fixed chisel, spring means for projecting the rollers above the chisel, posts connected to the base and extending above the same, a chisel carrier adjustably mounted on said posts, and a movable chisel connected to said chisel carrier.

9. A device for cutting pipe, including cooperable chisels and means forsupporting the pipe between the chisels and for permitting rotation of the same and comprising a number of seats having inclined faces, and rollers projecting above the inclined faces.

10. A pipe cutter having a stationary portion of the pipe, yieldable means for sup porting the pipe centered over the stationary chisel, a movable chisel carrier, means carried by the base and coacting with the chisel carrier for supporting it for movement toward and away from the base in the plane of the stationary chisel, and a movable chisel mounted on the chisel carrier and having a projecting portion adapted to be struck by a hammer.

12. A pipe cutter comprising a base, a stationary chisel projecting upwardly from the base and engageable with the under portion of the pipe, posts projecting upwardly from the base in the opposite sides of the stationary chisel, a movable chisel carrier, cooperating means between the chisel carrier and the posts for removably and adjustably interconnecting the chisel carrier to the posts, said chisel carrier being movable toward and' away from the stationary chisel in any adjustment, and a movable chisel mounted on the chisel carrier.

In witness whereof, I hereto aifix my signature.

LOUIS. n. GOELTZ.