US2944453A

US2944453A - Pipe fitting removal device

Info

Publication number: US2944453A
Application number: US724636A
Authority: US
Inventors: Philip J Brewington
Original assignee: Individual
Current assignee: Individual
Priority date: 1958-03-28
Filing date: 1958-03-28
Publication date: 1960-07-12
Anticipated expiration: 1977-07-12

Description

July 12, 1960 Filed March 28. 1958 FIG. 6

INVENTOR. PHIL/P J. BREWl/VGTOM United States Patent PIPE FITTlNG REMOVAL DEVICE Philip J. Brewington, 106 E. 46th St., Austin 5, Tex.

Filed Mar. 28, 1958, Ser. No. 724,636 2 Claims. c1. 81-121) This invention relates to pipe fitting removal devices and has for its object the provision of a two-piece dev1ce of this type in which each piece serves as the handle for the other when unscrewing a pipe fitting located in a position where access is quite limited.

A further object of the invention is to improve on each of the two pieces of the device to make same more efiicient in carrying out its function.

A still further object of the invention is to make it possible to use either end of the solid tool so that the two ends may be used with pipes of diiferent internal diameter. g

It is very convenient for a plumber or similar workman to have a single device which can do more than one job that is commonly met. The present device assembled in one way can remove broken pieces of pipe in pipe fittings In each tube of the hollow tool I provide an inwardly extending lug 16 or having a cutting or gripping edge 17 so that either end of the hollow tool may be forced over a piece of pipe fitting such as the cap 18 and when turned in a clockwise direction the lug 16 will ride nicely over the cap 18. When the hollow tool is turned in the opposite direction, however, the resilience of the steel tube 15 will cause the edge 17 to bite into the cap and therefore make a firm connection so that the cap 18 can readily be removed.

In Fig. 6 I have shown the device in full form. In this case the solid tool is being pushed into the nipple 5 just as in Fig. 1 and the hollow tool in this case becomes the handle. The end 9, which in this case would be the end of the extension :11, projects through the hole 27 in the mid-section of the hollowtool. In Fig. 4, for example,

the solid tool 10 would usually be placed through holes.

instance.

'. The operation of the device, should be apparent from or can take out nipples which do not protrude through the wall to a sufiicient distance to enable them to be removed by the conventional Stillson wrench. When assembled another way, the device easily removes such objects as a cap which is located flush with or even back of the wall finish line.

In the drawings:

Fig. l is a side elevation of the solid tool entering a nipple;

Fig. 2 is an end view of the tool;

Fig. 3 is a section on line 3-3 of Fig. 1;

Fig. 4 is a view partly in vertical section of the hollow tool removing a cap;

Fig. 5 is an end elevation of the hollow tube; and

Fig. 6 is a view similar to Fig. 1 but on a smaller scale.

In Fig. 1 the solid tool 1 has a central section 10 square in cross section and has extensions protruding from the central section 10 in opposite directions, each extension having a cutting edge 3 extending radially from the center to a corner of the four-sided tapered pyramid. This cutting edge leaves a portion 2 in pyramid shape while the cutting edge 3 is joined to a smooth face 13 extending to the boss 6 and then turning an angle of 130 degrees ending in a curve and forming a relief face 14. The left hand or opposite extension is numbered v11 and is exactly like the first extension except that it is preferably smaller so as to be used with a somewhat smaller pipe. The boss in this case is numbered 12 to better distinguish the two ends of the tool.

In Fig. 4 the hollow tool '8 is illustrated in central section, it being composed of a large cylindrical tube 22 integral with a smaller coaxial tube 15, the junction portion being of any shape but preferably conical and having a pair of

square holes

21 and 27 to receive either of the two extensions of the solid tool. Each of the

coaxial tubes

15 and 22 similarly have a pair of matching holes of difierent size, holes 23 and 24 being one pair and hole 20 having directly opposite it a similar hole a slight, bit larger on each edge.

the foregoing description. The

bosses

6 and 12 are essential to the particular form illustrated as this tool must be driven in and hammer blows on the blade on the tool in its present commercial form would chip and destroy the efiiciency of the tool. With the round end or boss projecting past the end of the blades this boss, either 6 or 12, will receive the hammer blows and thus entirely protect the blades as seen in either Fig. 2. or Fig. 3. The v making it very easy for the operator to aline the device.

What I claim is:

1. A tool for unscrewing a pipe fitting located in a position of limited access, comprising a hollow resilient steel tube of two coaxial cylindrical end portions of different diameters joined by an intermediate integral portion, each cylindrical portion having near its open end an angular struck-out lug with an inwardly projecting cut ting edge to grip the fitting when the tool is turned in one direction and to slip on the fitting when they tool is turned in the opposite direction about its axis, each of the portions having a pair of diametrically opposed holes forlreception of a handle serving member to rotate the too 2. The tool of claim 1 in which the holes are square and one hole of each pair is larger than the other hole of that pair, and the intermediate portion is conical and of shorter axial length than either cylindrical end portion.

References Cited in the file of this patent UNITED STATES PATENTS 166,514 Dunn Aug. 10, 1875 687,947 Weston Dec. 3, 1901 906,040 Lucas Dec. 8, 1908 1,417,725 Fullenwider May 30, 1922 1,798,944 Jackman Mar. 31, 1931 2,028,437 Carliss Jam-21, 1936 FOREIGN PATENTS 1,111,918 France Nov. 2, 1955