US2895362A - Wrench - Google Patents

Description

y 1959 G. H. JAMGOTCHIAN 2,895,362

WRENCH Filed Sept. 11, 1957 George H. Jamgafchian INVENTOR.

MW M1 2,895,362 Patented July 21, 1959 WRENCH George H. Jamgotchian, Fresno, Calif.

Application September 11, 1957, Serial No. 683,374

Claims. (C1. 81-90) This invention relates generally to a wrench, and more specifically to a wrench for thread cutting nuts.

In many trades and industries, thread cutting nuts are used as fasteners; for instance, in the securing of name plates and medallions on automobiles. Therefore, the primary object of this invention is to provide a new and improved type of wrench for thread cutting nuts.

Another object of this invention is to provide a wrench which is adaptable to accommodate the various types of handles, and also various size thread cutting nuts.

A further object of this invention is to produce a simple and inexpensive device and yet one which will be exceedingly elfective for the purpose for which it is designed.

These together with other objects and advantages which will become subsequently apparent reside in the details of construction and operation as more fully hereinafter described and claimed, reference being had to the accompanying drawings forming a part hereof, wherein like numerals refer to like parts throughout, and in which:

Figure 1 is a perspective view of the wrench comprising the present invention, illustrating a thread cutting nut secured to the wrench, and a handle attached for turning this wrench;

Figure 2 is a perspective view of the nut engaging portion of the wrench;

Figure 3 is a perspective view illustrating a handle engaging portion of the wrench;

Figure 4 is a vertical sectional view taken through the wrench and illustrating its use in attaching a nut to an automobile medallion for example; and

Figure 5 is a perspective view of a thread cutting nut for which the wrench was adapted for use.

Referring now more specifically to the drawings, the numeral generally designates the wrench comprising the present invention. In Figure 1, it can be seen that a thread cutting nut 12 is engaged by this wrench, and a wrench handle 14 engages this Wrench.

The wrench 10 comprises a cylindrical body portion 16 having a central longitudinally extending bore therethrough, this bore having a polygonal shaped lower section 18, and a circular upper portion 20. A counterbore 22 is formed at the upper portion of lower section 18.

The upper portion of the wrench 10 has two pairs of U-- shaped slots or grooves 24 and 26 formed on the upper surface thereof. It will be noticed that the slots 24 are formed deeper than slots 26, so as to accommodate a smaller thread cutting nut. Thus, the particular wrench illustrated in Figure 2 is adapted to accommodate two size thread cutting nuts. However, it will of course be realized, that these wrenches may be designed to accommodate a great number of different size thread cutting nuts.

Thread cutting nut 12 generally comprises a flat circular portion 28 having upstanding flanges 30 diametrically spaced about the peripheral edge of portion 28. Downwardly depending pointed sections 32 extend downwardly from the peripheral edge of flat portion 28 at a point adjacent flanges 30. An offset slot 34 is formed United States Patent Ofiice centrally inthread cutting nut 12, and this slot has extending inwardly about the edges thereof, thread cutting points 36, which act to cut threads onto a rod, when thread cutting nut 12 is rotated thereon.

As can be seen in Figure 1, a handle 14 is attached to wrench 10. This handle 14 generally consists of a centrally disposed shaft 38, having an extension 40 of crosssection so as to adapt itself for insertion into bore 18, extending from the outer end of shaft 38 thereof. The ratchet mechanism 42, of the type well-known in the art, is attached at the other end of shaft 38, and another shaft 44 extends outwardly therefrom. A hand-engaging portion 46 extends transversely of shaft 44 so as to more easily adapt handle proper 14 for turning.

In use, the thread cutting nut 12 would be secured onto the wrench, by snapping flanges 30 into one set of slots, either 24 or 26 depending on the size. Then, as may be seen in Fig. 4, by means of wrench 10, the nut 12 may be threaded onto projecting stud 48, and as the wrench turns the thread cutting nut, threads 50 are cut into stud 48, by. the sharp points 36. In this manner, the name plate 52 may be secured to support 54.

From the preceding description it will be seen that I have invented a new, novel and improved type of wrench for thread cutting, which lends itself to easily and quickly fasten a thread cutting nut onto a projecting stud, so as to cut threads, and then lock itself thereon.

The foregoing is considered as illustrative only of the principles of the invention. Further, since numerous modifications and changes will readily occur to those skilled in the art, it is not desired to limit the invention to the exact construction and operation shown and described, and accordingly all suitable modifications and equivalents may be resorted to, falling within the scope of the invention as claimed.

What is claimed as new is as follows:

1. A wrench for use particularly with thread cutting nuts of the type formed of a circular plate having a central opening formed therein with diametrically opposed inwardly and upwardly extending points projecting into the opening for cutting threads on rods disposed through the opening and having diametrically opposed upwardly extending flanges attached to the plate, said wrench comprising a cylindrical body having a nut engaging portion and a handle engaging portion and an axial bore formed therethrough, a wrench handle having a polygonal end, that portion of said bore disposed in the not engaging portion of said body being circular in configuration and of suflicient diameter to permit the passage thereinto of a rod onto which the nut is to be fastened, that portion of said bore disposed in the handle engaging portion of said body being polygonal in configuration and of sulficient dimensions to accommodate said handle end without permitting relative rotation therebetween, said nut engaging portion having diametrically opposed grooves in the outer end thereof the inner surfaces of which are spaced apart a distance substantially equal to the distance between the flanges on the thread cutting nut for frictional engagement with said flanges, said circular bore portion being countersunk at the outer end thereof to provide clearance for the nut points upon engagement of said nut on said wrench.

2. In a wrench for use particularly with fasteners of the type formed of a circular plate having a central opening formed therein and opposed upwardly extending flanges attached to the plate, said wrench comprising a body having a bore formed in one end thereof, said bore being of sufficient dimensions to accommodate for relative rotation therein a rod to which the fastener is to be connected, 2. pair of opposed grooves disposed in said one end of the body and having the inner surfaces thereof spaced'aparta suflicient distance for permitting the flanges to be frictionally engaged therein, whereby movement of said fastener is obtained by moving the wrench in the desired*directionfwith thefasterier engaged therewith.

j BkIn aWrench'fOr use particularly with fastenersof the type formed of'a' circular plate having'a central opening formed therein and "opposed upwardly extending flan gesattachedto'the plate, said wrench comprising a body having a'bore formed in one end thereof, said bore being of sufiicient dimensions to accommodate for rela- 'tive rotation therein a rod to which the fastener is to be desired direction, with the fastener engaged therewith,

another-pairof opposed grooves disposed in said one end *of' the body andangularly spaced from said first named --gmoves, the distance between the-inner surfaces of said other grooves being different than the corresponding distance of said first named grooves so that fasteners having different flange spacing may be accommodated.

4. Ina wrench for use'particularly with fasteners of the type formed of a circular plate having a central opening formed therein and opposed upwardly extending flanges attached to'the plate, said wrench comprising a body having a bore formed in one end thereof, said bore being of sufficient dimensions to-accommodate for relative rotation'therein a rod to Which'the fastener is to be connected, a pair of opposed grooves disposed in said one'end of the body and having the inner surfaces thereof *spaced apart a sufiicient distance for permitting the flanges to'be' frictionally engaged therein, whereby movement of s'aid fastener is'obtained by moving the Wrench in the *desired direction, with the fastener engaged therewith, another pair of opposedgrooves disposed in said one'end of the body and angularly spaced from said first'named grooves, the distance between the inner surface of said other grooves being-different than'the corresponding dis- 4 tance of said first named grooves so that fasteners having different flange spacing may be accommodated, a handle connected to said body for making movement of said Wrench easier.

5. A wrench for use particularly with thread cutting nuts of the type formed of a circular plate having a central opening formed therein with diametrically opposed inwardly and upwardly extending points projecting into the opening for cutting threads on rods disposed through the opening and having diametrically opposed upwardly extending flanges attached to the plate, said wrench comprising a cylindrical body having a nut'en'gagingportion and a handle engaging portion and an'axial bore formed therethrough, a wrench handle having a polygonal end, that portion of said bore disposed in the nut engaging portion of said body being circular in configuration and of suflicient diameter to permit the passage thereinto of -a rod onto which the nut is to be fastened, and the nut points upon engagement of said nut on said wrench, that portion of said bore disposed in the handle engaging portion of said body "being polygonal in configuration and of sufficient dimensions to accommodate said handle end without permitting'relative rotation therebetween, said nut enga ing vportionhaving diametrically opposed grooves in the outer end thereof the inner surfaces of which arelspaced apart a distance substantially equal to the distance between the fianges of the threaded cuttingnut'for 'fi'ictional engagement with said'flanges.

References'Cited'in the file of this patent UNITED STATES PATENTS 1,447,564 Norland et a1. Mar.-6, 1923 2,434,660 Knight Jan. 20, 1948 FOREIGN PATENTS 10,139 Great Britain 'Aug. 4, 1894 OTHER REFERENCES Jo. Mfg. 00., Catalog No. 1028, filed in Division 2 9 since June 24, 1946.

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