US2015782A - Pipe wrench - Google Patents

Description

Oct. 1, 1935. 1.. BRILEs PIPE WRENGH Fiied oot. 18, 1933 Patented Oct. 1, 1935 `UNITED STATES PATENT OFFICE 1 Claim.

This invention relates to wrenches and more particularly to pipe wrenches and has for its object the provision of a simple and inexpensive tool by which a pipe or rod may be easily engaged and turned to be removed from a threaded connection or securedin' such a` connection. The invention is illustrated in the accompanying drawing and will be hereinafter fully described, the novel features being defined in the appended claim.

In the drawing,

Figure 1 is a side elevation of a pipe wrench embodying the present invention,

Figure 2 is an edge elevation of the same.

In carrying out the invention, there is provided a handle bar or lever which is a metal bar of any desired length having a longitudinally projecting tongue 2 at one end, said tongue being centrally disposed whereby Shoulders 3 are produced at opposite sides of the tongue. Thehandle bar or lever is also provided adjacent the end having the tongue-with an obliquely extending slot 4, the purpose of which will presently appear. A jaw 5 is also provided and this jaw is formed from a single bar of metalor other suitable material having one end bifurcated, as shown at 6, to span the tongue 2 and be pivoted thereto by a rivet or pivot pin 1. The free end of the jaw 5 is formed into a Semi-oircular hook 8 adapted to 1 engage around a pipe or rod of oircular cross section, and upon the inner concave edge of this hook are formed work-holding teeth 9, as clearly shown in Figure 1. The wrench also includes a pair of jaws IO which are disposed at opposite sides of the handle bareand the first-mentioned jaw, it being noted, upon reference to Figure 2,

i that the handle bar and the jaw are of the same width so that the side jaws IU may be formed on straight lines and lie close to` the'handle bar and the central jaw. The jaws Illl are pivoted between their ends to the central Ajaw by a pin or rivet at a point beyond .the bifurcation of the central jaw, as shown in the drawing, and the forward ends of the jaws Ill are disposed obliquely r'elative to the edges of the jaws to form an obtuse angle therewith, as shown at l2, and are provided with work-holding teeth |3 cooperating with the teeth 9 to clamp a pipe i or rod, such as indicated at 14. The rear ends of the jaws IVO carry a pin 15 which passes through the slot 4` andis'adapted to slide therein, it being noted particularly upon reference to Figure 1 that this slot extends in the same general direci 'tion as the jaw 5 when said jaw is engaged with :1 work.

It is thought the operation of the tool will be readily understood from the foregoing description taken in connection with the accompanying drawing. The cooperating jaws may be easily l pushed apart at their free or Working ends to be 5 engaged around a pipe or rod and, if the handle bar or lever be then swung in the direction indicated by the arrow in Figure 1, the pin |5 will be engaged by the forward end of the slot 4 and the pull exerted upon said pin will then tend to 10 swing the central hook jaw into alinement with the handle bar so that the jaw will be caused to firmly clamp the work against the ends of the side jaws IO. Continued movement of the han- .dle bar or lever in the indicated direction will 15 cause the rod or pipe to turn sothat it may be quickly released from or engaged in a threaded joint. If the tool be reversed and operated in the described manner, the pipe or rod will, of course, be turned in `the opposite direction so 20 that the tool is equally well adapted to withdraw a rod or pipe or to secure the same. The tool is very compact and inexpensive and may be very readily engaged around the work by merely engaging the end of the hook jaw under the work 25 and then swinging the lever in the direction in which it is to operate. The work will be firmly clamp-ed between the jaws and may be operated in a corner or other restricted space. The obliquely disposed slot 4, cooperating with the pin 30 |5, causes the side jaws to readily move toward the hook jaw and engage the work, and also accommodates the angular movement of the pin i when the work is to be released. i

Having thus described the invention, I claim: 35 A pipe wrench comprising a handle bar having its forward end portion reduced in thickness to form a tongueand concaved Shoulders at opposite sides of inner ends of the tongue, the handle having a portion spaced rearwardly from the 40' tongue widened to form a side extension, the handle being formed with a curved slot extending longitudinally thereof with one end portion extending into the side extension, a center jaw having a curved bill and a shank of less width than 45 the bill, the portions of the bill projecting from opposite side faces of the shank forming abutment VShoulders extending diagonally across the forward end of the shanK, the rear end of the shank beingformed with ears engaging opposite 50 faces of the tongue and terminating in arcuate ends engaging the Shoulders of the handle, a pivot pin passing through the ears and tongue,

side faces of the shank being fiush with side faces i of the handle, side jaws each having a. flat shank 55 bearing against a. side face of the shank of the extending through the shank of the center jaw' center jaw and a bill extending diagonally from and through the side jaws at the junction of their its shank and having its free forward end porbills and shanks, and a pin connecting rear ends tion formed with a pipe engaging fiange projectof the shanks of the side jaws and slidably en- 5 ing from its inner side face in overlapping relagaged through the slot of the handle. 6

ton to the bill of the center jaw, a pivot pin LARKIN BRILES. EL. s.]

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