US2729998A

US2729998A - Self-gripping tool for turning socket head fasteners

Info

Publication number: US2729998A
Application number: US426849A
Authority: US
Inventors: John J Deliso
Original assignee: Individual
Current assignee: Individual
Priority date: 1954-04-30
Filing date: 1954-04-30
Publication date: 1956-01-10
Anticipated expiration: 1973-01-10

Description

Jan. 10, 1956 J. J. DELISO 2,729,998

SELF-GRIFFING TOOL FOR TURNING SOCKET HEAD FASTENERS Filed April 50, 1954 1N VEN TOR. 7 6 JZHA/J DEL I so United States Patent SELF-GRIPPING TOOL FOR TURNING SOCKET HEAD FASTENERS John J. Deliso, Worcester, Mass. Application April 30, 1954, Serial No. 426,849

2 Claims. (Cl. 81-72) This invention relates to a new and improved tool particularly adapted to act in the manner of a wrench or nut runner for turning socket head fasteners such as Allen-head screws or the like, and the principal object of the invention resides in the provision of a self-gripping tool of this nature which is easily and quickly insertable in the socket and tends automatically to expand to grasp the fastener at the interior walls of the socket, whereby such fastener may be held releasably to the tool for quick and easy application thereof where desired.

Further objects of the invention reside in the provision of a tool of the class described comprising a pair of separate elongated wire members shaped complementarily to fit the socket, said members being held together in llatwise contacting relation by welding or by other means such as a ferrule, said wire members being permanently sprung slightly apart and providing for resilient compression thereof, so that when the free ends thereof are inserted in a socket, they will be compressed or sprung toward each other to exert a reactionary force outwardly against the walls of the socket and frictionally hold the same thereto; and the provision of a multi-part, secured wire wrench wherein the separate parts are made to be substantially on size to fit the socket, when compressed, so that the wire parts support each other laterally to make a stronger tool.

Other objects and advantages of the invention will appear hereinafter.

Reference is to be had to the accompanying drawings, in which Fig. 1 is a view in side elevation of a tool according to the present invention;

Fig. 2 is an enlarged view illustrating the tips of the socket-holding members in side elevation;

Fig. 3 is an end view thereof;

Fig. 4 is an end view of a modification;

Fig. 5 is a view in side elevation illustrating a step in the process of making the tool;

Fig. 6 is a view illustrating the use of the tool;

Figs. 7, 8, 9 and 10 illustrate other but non-limiting shapes of wire; and

Fig. 11 illustrates another form of wrench.

In carrying out the present invention, a pair of elongated drawn wires generally indicated at 10 and 12 are provided and these wires are alike in section but reversed in the finished tool, so as together to form a shape complementary to the socket.

The cross section of the wire may be multi-sided and of any shape as illustrated, and the split between the wires may be either on a long or a short axis relative to the resultant solid. In actual use, the Fig. 3 form is preferred, but the invention is not limited to this form and could be made in the forms shown in Figs. 4 and 7-10 inclusive.

The two

wires

10 and 12 are flatly held together and secured by sinking the same in a ferrule 14 (see Fig. 5) or by welding as in Fig. 11, see the numeral 13. The ferrule is preferably provided with longitudinal keys or the like, and the same may be sunk into a handle 16 which may be a conventional handle for tools such as screw-drivers, nut runners, etc.

In any event, it will be clear that the

wires

10 and 12 are sprung slightly apart as clearly illustrated in Figs. 1 to 4 inclusive, and this forms a space or slit 18 between the wires, regardless of the shape of the wires. This separation is formed in such a Way as to preserve the resiliency of the wires, and they are held in the spaced relation shown and do not return to the original fiat contacting position of Fig. 5 except when under the influence of inwardly directed pressure. When so compressed, the wires assume a complete and exact shape of the socket, and are on size and contact each other at their fiat sides providing lateral support.

The fingers of the operator may press the wires together so as to easily enter the same into the socket head 20 of a conventional socket head fastener. On the other hand, the free ends of the wires may be beveled as at 22, so that the free ends of the wires may be thrust into the socket as illustrated in; Fig. 6. In this figure, the tool is shown in normal condition in dotted lines, and it is merely necessary to advance the same toward the socket and then press axially on the handle of the tool so that the beveled portions 22 act to cam the two wires in toward each other as shown in solid lines in this figure. In this position, of course, the not or other socketed fastener is firmly frictionally held by the tool, and once the tool has provided for attachment of the fastener where desired, it is quickly and easily withdrawn, whereupon the

wires

10 or 12 may snap back to their original position in spaced relation to each other, as in Fig. 1.

It will be seen that this invention provides a relatively simple and inexpensive nut runner or similar type of tool which grips the socket head fasteners and holds the same while being applied to the desired locations. By using the two separate wires, any size of tool can be made down to the extreme smallest size of nut or screw and this would of course be impossible if it were attempted to make the tool by first providing a shaped section wire and then cutting it, as so much material would have to be removed as to make the wire ineffective for the purpose at hand.

Furthermore, relatively expensive cutting or slitting operations are completely avoided by making the present tool in the form of the two wires and also tempering, etc. is largely avoided, the only necessary thing being to permanently separate the wires by forming the space 18 as described above.

Any sectional shape is possible, and various forms are shown in the Pigs. 7 l0 inclusive. These forms are illustrative and not inclusive, and in all cases, the socket outline or shape is the same as the wires when contacting, so that the socket is always filled and the parts are solidly but releasably connected.

Having thus described my invention and the advan tages thereof, I do not wish to be limited to the details herein disclosed, otherwise than as set forth in the claims, but what I claim is:

1. A tool for holding and turning a hexagonal socket head fastener, said tool comprising a plurality of elongated conjoined but separate wires each having a cross section in the form of half a regular hexagon, means holding the wires in parallel relationship, said wires having corresponding free ends slightly spaced apart, said wires of half-hexagon section being springy and each having a substantially flat side, the flat sides facing each other and together forming a full regular hexagon section when pressed together, to substantially fit and fill the hexagonal socket of the fastener.

2. A tool for holding and turning a hexagonal socket ead fi fiq srh aisl l.., .mn i n u l ty fie r gated conjoined but separate springy wires, means for holding the wires in substantially parallel relationship, said wires having corresponding ends free, and being distorted to be slightly spaced at the free endsthereof, 5 said wires when pressed together forming a regular hexagonal section to fitexaetly the socket of the fastener and each wire havinga flat side to contact a like flatside of the otherwir'e, said flat sides being diametrical of the hexagonal from a corner to an opposite corner thereof. 10

UNITED STHATES PATENTS Balsley Aug. 13, 1895 Jansson et al Nov. 4, 1930 Muller June 27, 1933 Trotter Oct. 1, 1935 QR Q P EN France Oct. 24, 1932 Switzerland Jan. 17, 1949 Germany July 9, 1951