US 2847889 A
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Description (OCR text may contain errors)
Aug. 19, 1958 F. \O. CAIN 2,847,889
GRIPPING TOOL JAWS Filed Jan. 24, 1955 Ferie/l 0. Gain 7 INVENTOR.
Attorney United States Patent Office 2,847,889 Patented Aug. 19, 1958 GRIPPIN G TOOL JAWS Ferrell 0. Cain, Geneva, Ala., assignor of one-half to J. Lewis Phillips, Geneva, Ala.
Application January 24, 1955, Serial No. 483,496 1 Claim. (Cl. 81-425) This invention generally relates to a tool, and more specifically provides improved and novel construction in a gripping tool generally known as pliers.
An object of this invention is to provide a gripping tool in the nature of a pair of pliers having a pair of elongated members pivotally attached or connected together which at one end form a pair of handles and at the other end form a pair of jaws which may be pivoted toward each other for gripping purposes.
Another object of the present invention is to provide a gripping tool having two members pivoted together and crossed with a spring member normally urging the gripping jaws and the handle portions away from each other.
Still another important object of the present invention is to provide a gripping tool in the nature of a pair of pliers that includes new and useful gripping jaw structure wherein both longitudinal and transverse serrations are provided on the gripping or facing surfaces of the jaw for increasing the efliciency and effectiveness of the gripping surfaces.
Yet another important feature of the present invention is to provide a gripping tool having gripping jaws with surfaces thereon wherein a portion of the gripping surface is defined by a raised portion at one side and a recessed portion at the other side wherein the tool may be used for gripping various sizes and types of objects, thereby increasing the utility of the tool.
A still further novel feature of the present invention is to provide a gripping tool having transversely and longitudinally serrated faces that is provided with a longitndinal portion at the ends thereof having the longitudinal serrations whereby the tool may be utilized to grip a bolt head or the like wherein the tool will generally extend longitudinally in the same plane as the bolt.
Other important objects of the present invention will reside in its simplicity of construction, efiiciency of use, compactness, versatility, adaptation for its various purposes and relative inexpensive manufacturing costs.
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 side elevational view of the gripping tool of the present invention;
Figure 2 is a side elevational view of the gripping tool of the present invention, looking at the other side of the tool from that illustrated in Figure 1;
Figure 3 is an end elevational view showing the ends of the gripping jaws of the tool of the present invention;
Figure 4 is an enlarged side elevational view showing the gripping jaws in open position; and
Figure 5 is a top plan sectional view taken substantially upon a plane passing along section line 55 of Figure 1 showing the details of construction of one of the jaws.
Referring now specifically to the drawings, it will be seen that the numeral 10 generally designates the gripping tool of the present invention. The tool 10 includes a pair of elongated members 12 and 14 which are crossed and pivotally connected to each other by a pivot pin 16. One end of the member 12 is provided with a handle portion 18 and the other end of the member 12 is provided with a jaw 20. One end of the elongated member 14 is provided with a handle portion 22 and the other end thereof is provided with a gripping jaw 24 wherein the gripping jaws 20 and 24 are moved towards each other by moving the handle portions 18 and 22 towards each other by gripping with a hand. Each of the jaw portions 20 and 24 are provided with a laterally projecting pin 26 and 28 that receives the hook ends 30 of a generally circular spring 32. The spring 32 surrounds the pivot axis formed by the pivot pin 16, and the hook ends 30 are free from each other and are positioned around the pins 26 and 28 wherein the spring 32 will normally urge the jaws 20 and 24 away from each other and pivot the elongated members 12 and 14 about the pivot pin 16, thereby moving the handles 18 and 20 away from each other. Therefore, it will be readily seen that the members 12 and 14 are normally urged so that the jaws 20 and 24 will be open.
The members 12 and 14 are generally elongated and thin, and the jaws 20 and 24 are formed by laterally extending shoulders 34 and 36 which are integrally formed with the members 12 and 14 and which form relatively wide surfaces 38 which face each other for gripping various objects. The side edges of the faces 38 generally taper inwardly as does the thickness of the jaws 20 and 24. This tapering generally gives the jaws 20 and 24 a pointed effect with the free ends thereof being flattened as indicated by the numeral 40.
The surface 38 adjacent the forward portion thereof is provided with a longitudinal concave portion 42 having a plurality of longitudinal serrations 44 therein and the concave portion 42 is formed by side edges 46 that are provided with transverse serrations 48 and an end wall 49 forming a transverse abutment limiting the longitudinal insertion of an article to be gripped. The
longitudinal serrations 44 are generally diverging in conformance with the side edges of the facing surface 38, thereby permitting the serration 44 to grip a bolt head or nut with the handle portions 18 and 20 generally forming a longitudinal extension of such a bolt, thereby permitting the gripping tool 10 to be used in relatively inaccessible positions Adjacent the rear of the surface 38 is a shoulder 50 which forms a cutting edge on each of the jaws 20 and 24. This permits the use of the tool 10 in cutting wires or other similar material, thereby increasing the utility of the tool.
The surface 38 between the concave portion 42 and the shoulder 50 is provided with a longitudinal shoulder 52 which divides the surface 38 into two areas 54 and 56. The area 54 is disposed below the plane of the area 56 and is generally concave, as illustrated in Figure 2' Both of the surfaces 54 and 56 are provided with transverse serrations 58 for gripping and the surface 56 as well as the surface 54 is generally concave with the surface 56 including outwardly projecting serrations 60 which form a gripping area by contact with similar serrations 60 on the other of the jaws. Forwardly of the projecting serrations 60, all of the serrations normally contact each other when the handles 18 and 22 are moved to their most adjacent position. It will be seen that the areas 54 and 56 being disposed at two different levels permit the gripping tool of the present invention to be utilized for gripping objects of a wide range of sizes in a most efficient and effective manner. Also, the particular construction of the nose or outer end of the jaws 20 and 24 51 permits use of the tool 10 as a staple puller, gripping tool and as a substitute for a wrench wherein the device may be utilized in a highly inaccessible area.
If the tool of the present invention is constructed of suitable materials normally utilized in constructing tools of this nature, it will be highly useful and versatile for many purposes, such as rotating nuts, pulling staples, cutting wires, bending and forming wires, turning and removing taps, and many other varied and allied purposes. 7
From the foregoing, the construction and operation of the device will be readily understood and further explanation is believed to be unnecessary. However, 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 shown and described, and accordingly, all suitable modifications and equivalents may be resorted to, falling Within the scope of the appended claim:
What is claimed as new is as follows:
In a gripping tool, a pair of opposed gripping jaws movable towards each other about a common pivot point, each of said jaws including a longitudinal concave surface extending to the free end thereof and terminating at its inner end in a transverse abutment for limiting the longitudinal insertion of an article to be gripped, said concave surface having a plurality of inwardly diverging longitudinal serrations therein for gripping the article, said concave surface being defined by flat edge portions having transverse gripping serrations therein, the portion of each jaw inwardly of the transverse abutment having transverse concave portions separated at the longitudinal center of the jaw by a longitudinal shoulder thus forming concave portions of different depths, the concave portion on each side of the shoulder having transverse serrations therein with the ridges and valleys of the serrations being in transverse alignment, said longitudinal shoulder limiting the transverse insertion of an article to be gripped.
References Cited in the file of this patent UNlTED STATES PATENTS 272,573 Mihan Feb. 20, 1883 669,721 Bruce Mar. 12, 1901 1,116,093 McKaig Nov. 3, 1914 1,367,362 Earnhart Feb. 1, 1921 1,657,348 Drumm Jan. 24, 1928 1,661,333 Gurnett Mar. 6, 1928 FOREIGN PATENTS 909,393 France Dec. 20, 1945