US3837213A

US3837213A - Sizing and forming tool

Info

Publication number: US3837213A
Application number: US00340758A
Authority: US
Inventors: R Guzzo
Original assignee: Individual
Current assignee: Individual
Priority date: 1973-03-13
Filing date: 1973-03-13
Publication date: 1974-09-24
Anticipated expiration: 1991-09-24

Abstract

A sizing and forming tool for reshaping the end of a pipe or tube that has been cut. The tool has an internal expanding cam and an external contracting cam for reshaping such pipe or tube to perfectly cylindrical form.

Description

United States Patent [1 1 Guzze Sept. 24, 1974 SIZING AND FORMING TOOL [76] Inventor: Ralph F. Guzzo, RD. N0. 1, Amity,

22 Filed: Mar. 13, 1973 21 Appl. No.: 340,758

[52] US. Cl. 72/479 [51] Int. Cl B21d 3/14 [58] Field of Search 72/479, 476, 367, 370,

[56] References Cited UNITED STATES PATENTS Mueller 72/476 2,438,292 3/1948 Linker .1 72/479 2,746,325 5/1956 Kjellberg.. 72/479 3,417,603 12/1968 Loew 1. 72/479 Primary ExaminerCharles W. Lanham Assistant Examiner-Gene P. Crosby [57] ABSTRACT A sizing and forming tool for reshaping the end of a pipe or tube that has been cut. The tool has an internal expanding cam and an external contracting cam for reshaping such pipe or tube to perfectly cylindrical form.

1 Claim, 6 Drawing Figures PAIENIED 2 1974 3 887. 2 1 3 V/IIL:

SIZING AND FORMING TOOL This invention relates to a manually operated sizing and forming tool.

An outstanding disadvantage of conventionally used tools for reshaping the ends of cut tubes and pipes, involving insertion of a reamer inside thereof, has been that the outer surfaces of the pipe end often project outwardly beyond the periphery of the tube or pipe and give an imperfect shape.

Another disadvantage of commonly used sizing and forming tools is that they are generally cumbersome and complicated in construction and often require power operation.

An object of the present invention is to provide a novel sizing and roming tool which is devoid of the abovenamed disadvantages and which is manually operable for reshaping distorted cut ends of tubes and pipes to their proper cylindrical shape.

A more specific object of the invention is to provide a manually operable sizing and forming tool for not only expanding the inner wall surface but for contracting the outer wall surface of a pipe or tube end to reshape it to its original cylindrical configuration.

Other objects and advantages will become more apparent from a study of the following description taken with the accompanying drawing wherein:

FIG. 1 is a side view of a sizing and forming tool embodying the principles of the present invention;

FIG. 2 is an end view thereof as viewed from the right of FIG. 1;

FIG. 3 is a view similar to FIG. I with parts shown broken away;

FIG. 4 is an end view and FIG. 5 is a longitudinal view, partly in cross-section, respectively of a pipe whose end is to be reshaped; and,

FIG. 6 is a view similar to FIG. 3 but showing the pipe after it has been reshaped by the tool to its original cylindrical shape.

Referring more particularly to FIGS. 1, 2 and 3 of the drawing, numeral 1 generally denotes a sizing and forming tool which can be manually operated and which comprises a handle 2, a cylindrical body portion 3 having a somewhat cylindrical groove 4 which progressively expands in diameter along a cam surface 5 on its outer wall and a cam surface 6 on its inner wall,

the latter forming a portion of a cam or expander 7.

As shown in FIGS. 4 and 5, the end of a pipe or tube 8 that has been cut at the end and which has inwardly projecting portions 10 and very likely radially outwardly extending portions (not shown).

In operation, in order to reshape the end of pipe 8 to its original form, the tool 1 is moved relative to the pipe 8, as shown in FIG. 6, whereby the cam portion 6 expands the inwardly extending portions 10 and the cam portion 5 progressively contracts the outwardly extending portions so as to reshape the end of the pipe to the cylindrical form of uniform thickness shown at the base of groove 4. The end of the pipe is limited in movement by the base end of the groove.

It will be noted that the cam 7 projects outwardly of the body portion so as to effect expansion of part 10 before the contracting movement takes place by the camming portion 5.

Thus it will be seen that I have provided a highly efficient sizing and forming tool of relatively simple and inexpensive construction, which tool embodies cams for both expanding the inner wall surface and contracting the outer wall surface of the end ofa pipe which has been distorted by cutting or for any other reasons.

While I have illustrated and described a single specific embodiment of my invention it will be understood that this is by way of illustration only and that various changes may be made in my invention and within the scope of the following claims.

I claim:

1. A reshaping tool for reshaping the ends of cut pipes and tubes, comprising an elongated, cylindrical handle, a cylindrical body portion integrally formed at the end of said handle portion, said body portion including a substantially cylindrical groove coaxial with and of greater diameter than said handle portion, said groove being defined by an internal cam for expanding the internal surface of the pipe or tube, the outer wall of said groove being defined by an external cam for contracting the outer surface of the end of said pipe or tube, the base of said groove being cylindrical and of uniform thickness, said internal cam projecting beyond the end of said body portion to provide expansion of the inner surface of the end of the pipe or tube before contraction is effected by said outer cam portion.