US2379177A

US2379177A - Pipe cutter

Info

Publication number: US2379177A
Application number: US563940A
Authority: US
Inventors: Lester J Pavey
Original assignee: Individual
Current assignee: Individual
Priority date: 1944-11-17
Filing date: 1944-11-17
Publication date: 1945-06-26
Anticipated expiration: 1962-06-26

Description

June 26, 1945. PAVEY 2,379,177

PIPE CUTTER Filed Nov. 17, 1944 2 Sheets-Sheet 1 M v, V

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By I I 3M0 2 Sheets-Sheet 2 1.. J. PA E PIPE CUTTER Filed Nov. 17, 1944 June 26, 1945- gw Mzaw d lesz er JPmy Patented June 26, 1945 UNITED STATES PATENT OFFICE 2,379,177 V a PIPE CUTTER Lester J. Pavey, OkIahoina City, ,1 7 Application November 17, 1944, Serial No. 563,940

7 {Claims torso-99) f f The present inventionrelates to new and'useful' improvements in ratchet pipe cutters for use particularly in ditches and other comparatively close inaccessible places, and has for its primary object to provide,'in a manner as hereinafter set forth, a tool of this character which is adapted to be expeditiously engaged with a pipe at any desired point.

Another very important object of the invention is to provide a ratchet pipe cutter of the aforementioned character which embodies a unique construction and arrangement of cutting disk and feed screw therefor.

Figure 1 is a view in side elevation of a ratchet pipe cutter constructed in accordance with the present invention, a portion of the device being broken away in section. a

Figure 2 is a, sectional view, taken substantially on the line 2-2 of Figure 1.

Figure 3 is an elevational view of the device, taken at right angles to Figure 1. I

Figure 4 is a fragmentary view in elevation, looking at the device from the line 4-4 in Figure 1.

Figure 5 is a detail view in section, taken substantially on the line 55 of Figure 1.

Figure 6 is a detail viewof the cutting disk and the mounting therefor.

Referring now to the drawings in detail, it will be seen that the embodiment of the invention which has been illustrated comprises a metallic ring I of suitable dimensions. As illustrated to advantage in Figure 2 of the drawings, the ring I is substantially c-shaped in transverse section and comprises a removable side member 2. The ring I further includes a swinging segment 3 which is hingedly connected at 4 to the main body of said ring. Mounted radially on the ring I is an operating handle 5. Any suitable means may, if desired, be provided for securing the hinged segment 3 in closed position.

Rotatably mounted in the ring I and projecting inwardly therefrom is an annular ratchet 6.

The annular ratchet 8 includes a separate section I which is adapted to be positioned in the segment 3 for swinging movement therewith when the tool is opened for engagement with or disengagement from the pipe to be cut, as at 8. A reversible spring-pressed pawl 9 is slidably mounted on the ring segment 3 for engagement with the ratchet 6 for operatively connecting the ring I thereto.

A substantially U-shaped metallic frame I0 is rigidly secured at II on one side of the ratchet 6. Journaledat I2 in the frame In is aswinging arm I3 havingon its free end portion'a housing I4 in which a disk cutter I5 is journaled. "A thumb screw I6 is threadedly mounted in one end portion of the frame I0 and engaged with the housing I4 for feeding the disk cutter I5 to the pipe 8. A spring I1 is mounted on the frame I0 and engaged with the arm I3 for maintaining the housing I4 in engagement with the feed screw I6. Rollers I8 ar journaled in the other end portion of the frame III for travel about the pipe 8.

It is thought that the manner in which the device is used will be readily apparent from a consideration of the foregoing. I Briefly, to engage the tool with the pipe to be cut, the segment 3 of the ring I, with the section I of the annular ratchet 6 therein, is swung outwardly to open position. Thus, the head assembly of the tool is applied to the pipe at any desired intermediate point. With th pipe 8 engaged between the rollers I8 and the cutting disk I5, the feed screw I6 is tightened to properly adjust said cutting disk on the pipe. The segment 3 of the ring I is, of course, closed and the cutting operation may begin. The ring I is rotated in one direction through the medium of the handle 5 and the pawl 9 rotates the annular ratchet 6 in unison with said ring. Thus, the cutting disk I5 is caused to travel around the pipe 8. When th handle 5 is swung in the opposite direction with the ring I, the pawl 9 rides over the teeth of the annular ratchet 6 to obtain a new hold thereon and the operation is repeated. As the cutting of the pipe 8 progresses, the disk I5 is fed thereto'through the medium of the thumb screw I6. A spacer I9 is provided between the frame I0 and the inner portion of the annular ratchet 6 on which said frame is mounted.

It is believed that the. many advantages of a ratchet pipe cutter constructed in accordance with the present invention will be readily understood, and although a preferred embodiment of the device is as illustrated and described, it is to be understood that changes in the details of construction may be resorted to which will fall within the scope of the invention as claimed.

What is claimed is:

l. A pipe cutter of the character-described comprising a ring adapted to rotatably encircle a pipe,an annular ratchet rotatably mounted insaid ring and adapted to encircle the pipe, a pawl operatively connecting the ring to the ratchet, a frame fixed on one side of the ratchet, rollers journaled on the frame and operable on the pipe,

a cutting disk mounted for swinging movement 0n,the frame, and a screw threadedly mounted on the frame and operatively engageable with the disk for feeding same to the pipe.

2. A pipe cutter of the character described comprising a ring adapted to encircle a pipe to be cut, an operating handle on the ring, an annular ratchet rotatably mounted in the ring and adapted to encircle the pipe, a pawl on the ring engageable with the ratchet for actuatingsaidratchet in one direction with the ring, a substantially U-shaped frame fixed on one side of the annular ratchet, rollers j ournaled on the frame and operable on the pipe, an arm pivotally mounted on the frame, a housing on one end of the arm,:a cutting disk journaled in said housingiand engageable with the pipe, and a "thumb screw threadedly mounted in oneend ,portion tofithe frame and engaged with the housing for feeding the cutting disk to the pipe.

.3. ,A pipe cutter of the character described comprising a ring \of substantially C-shaped transverse section adapted'toencircle' a pipe to be cut, an operating handle radiating from the ring, an annular ratchet rotatably mounted in the ring, the inner portion of said annular ratchet being free of said ring, a pawl slidably mounted on the periphery of the ring and engageable with the ratchet for actuating same in one direction with said ring, a substantially U-shaped frame mounted on the free inner portion of the ring on one side thereof, rollers journaled on one end portion of the frame and operable on the pipe,

an arm pivotally mounted for swinging movement on the frame at an intermediate point, a housing integral with th free end of said arm,

a cutting disk journaled in said housing and engageable with the pipe, a thumb screw threadedly mounted in the other end portion of the frame and engageable with the housing for feedscrew.

LESTER J. PAVEY.