US2520269A - Sheet metal lock nut wrench - Google Patents

Description

9, 1950 B. A. BAKER 2,520,269

SHEET METAL LOCK NUT WRENCH Filed April ,19, 1948 INVENTOR B WM ATTORNEYS Patented Aug. 29, 1950 UNITED STAT S sneer METAL nocnfnurwnnnon Bennie A. Baker, Lake Spaulding, Calif.

Application April-19, 1943;. Serial Nor zest-2 relating. (Cl. 81-12421) This invention isdirected to, andit. is an object to' provide, a novel Wrench for initially supporting: and then attaching sheet metal lock: nuts;

Another object of the invention is to provide a sheet metal locknut wrench which isarranged to be used as an adapter on a conventional socket wrench.

An additional object of the invention is to: provide' asheet metal lock nut wrench, as above, which is arranged so that a nut may be menually applied over the outer-: end of the supporting mandrel with ease; the mandrel being inwardly movablei-n a; manner so that whenthe-nut is being run onto a bolt; the nut flanges are not only protected on the inside by the mandrel but are held against outwardlateral. deflection or deformation by the socket of the socket. wrench.

A further object is to provide a sheet, metal lock n'utr wrench which isadjustable for use with socket wrenchesiof different depths:

It is also an object to' provide a) sheet metal lock nut wrench which supports the nut, for application, in a position which assures of ready and pro er attachment to a bolt.

A further object ofthe invention is to provide a practical and reliable device, and one which will be exceedingly effective for the purpose for which it is designed.

These objects are accomplished by means of such structure and relative arrangement of parts as will fully appear by a perusal of the followspecification and claims-L In the drawings Fig} 1 is an elevation of acen venuoriar secret wrench showing the sheet n'ietal' loch nut wrench therein for use.

Fig. 2 is a View similar to Fig. l, but in enlarged form, and shows the sheet metal lock nut wrench in section, and in starting position of the parts.

Fig. 3 is a fragmentary sectional elevation, illustrating the position of the parts of the wrench when a sheet metal lock nut is being applied.

Fig. 4 is an outer end view of the assembly.

Referring now more particularly to the characters of reference on the drawings, the numeral l indicates a conventional socket wrench which includes an open-ended hexagonal socket 2 at one end, and another socket 3 at its opposite end for reception of an actuating stem 4.

The sheet metal lock nut wrench, which is the subject of the present invention, is adapted to engage in the open-ended hexagonal socket 2 of the socket wrench I, and comprises the following structural arrangement:

exterior hexagonal sleeve 5 of a length lesser than the depth ofthe socket 2 is adapted to slidably and matchingly engage in the latter. The exterior hexagonal sleeve 5 is fitted, at its inner end-,- with; a fixed. collar 6' through. which a screw stem i extends axially. At its free end the screw stem] is formed with a hexagonal head 3 which likewise matchingly engages in the sock et 2,. being adapted to abut the inner end otthe latter, asat 9.

By. preliminary adjustment of the screw stern! the position of the exterior hexagonal sleeve 5 in the socket 2- can be predetermined; the adjustment being such that the outer end of the sleeve 5 is disposed short of thecorrespondi'ng ndof the socket 2, for the purpose hereinafter described. It is thus evident that the device is adjustable for use in sockets of different depths.

An internal hexagonal sleeve l'li' is matchingly and slidably disposed in the exterior hexagonal sleeve 5; the sleeve [0, projecting at its outer end some distancebeyond the corresponding end of the sleeve- 5,;whichprojection is suflicient to normally extendbeyond the socket 2. This outer end of the internal hexagonal sleeve IB serves as a mandrel, indicated generally at l l I The extent to which the internal hexagonal sleeve H; may project out; of the exterior hexagorial sleeve 5, and the socket 2,- is limited by outturned hubs t2 which run in longitudinal slot-s #31 in opposite sides of said sleeve 5.

A-compression spring M is disposed within the internal hexagonal sleeve HF and engages between the fixed collar 6 and stops l5 inturned from said sleeve Hr, on opposite" side intermediate the ends of the sleeve.

The spring it always urges the internal hexagonal sleeve to outwardly whereby to normally dispose the mandrel ll outside the socket 2 for manual access.

The above described sheet metal lock nut wrench is used in the following manner:

A sheet metal lock nut iii of hexagonal configuration, and which includes edge flanges I1, is placed by hand on the mandrel II of the internal hexagonal sleeve Hi. Thereafter, the socket wrench I is manipulated to run the nut [6 onto the bolt. At the outset of this operation, when axial force is applied to the wrench I, the internal hexagonal sleeve l0 retracts or shifts inwardly against the compression of spring l4, and until the flanges I! of the nut l6 enter the socket 2 in the manner shown in Fig. 3. When this occurs the flanges I! are supported on the inside by the mandrel I I and are supported on the out- 3 side by the adjacent part of the socket 2; said flanges thus being maintained against deformation when the nut is being run onto the bolt.

The described Wrench provides a very practical and effective device for the application of sheet metal lock nuts, which latter cannot be satisfactorily secured in place by conventional tools.

The described wrench is convenient to use for the reason that the mandrel is normally exposed for easy access by hand and so that the lock nut can be applied thereto within the vision of the mechanic. Once the lock nut is on the mandrel it is effectively held in a position at right angles to the axis of the wrench, which facilitates nut application.

The size of the mandrel II is such that each lock nut frictionally engages the same so that the nut does not accidentally fall off while being moved to its position of attachment. Additionally, the frictional engagement of the device in the socket 2 prevents accidental separation therebetween in any position of use.

From the foregoing description it will be readily seen that there has been produced such a device as substantially fulfills the objects of the invention as set forth herein.

While this specification sets forth in detail the present and preferred construction of the device, still in practice such deviations from such detail may be resorted to as do not form a departure from the spirit of the invention, as defined by the appended claims.

Having thus described the invention, the following are claimed as new and useful, and upon which Letters Patent are desired:

' 1. A sheet metal lock nut wrench comprising an external sleeve, of non-circular configuration in cross section, adapted to matchingly engage in the socket of a socket wrench, an internal sleeve matchingly and slidably engaged in the external sleeve and projecting axially outward therefrom as a non-circular nut receiving mandrel, means to limit outward sliding movement of the internal sleeve, and a spring in the sleeve assembly yieldably resisting inward sliding movement of the internal sleeve; the external sleeve terminating short of the outer end of the socket.

2. A sheet metal lock nut wrench comprising an external sleeve, of non-circular configuration in cross section, adapted to matchingly engage in the socket'of a socket wrench, an internal sleeve matchingly and slidably engaged in the external sleeve and projecting axially outward therefrom as a non-circular nut receiving mandrel, means to limit outward sliding movement of the internal sleeve, and a spring in the sleeve assembly yieldably resisting inward sliding movement of the internal sleeve; there being adjustable stop means to set the position of the external sleeve in the socket, and said external sleeve being set so that it terminates short of the outer end of said socket.

3. In combination with a socket wrench, a sleeve fitted into the Wrench socket in non-turnable relation with respect thereto, a mandrel mounted in the sleeve in non-turnable relation thereto and slidable co-axially thereof, the mandrel normally projecting beyond the end of the socket, the outer end of the mandrel being shaped to receive thereon in frictional relation therewith a sheet metal nut having a peripheral edge flange.

4. A combination as in claim 3 including stop means interposed between the sleeve and the mandrel to limit relative axial movement between the two.

5. A combination as in claim 4 including yieldable means interposed between the sleeve and the mandrel to normally hold the mandrel in its outermost position relative to the end of the sleeve.

6. A combination as in claim 5 in which the mandrel moves inside the sleeve, the outer end of the sleeve terminating short of the outer end of the socket, the thickness of the sleeve wall being substantially that of the thickness of the edge flange of a nut to be received on the mandrel.

7. In combination with a socket wrench, a sleeve slidably fitted into the wrench socket in non-turnable relation with respect thereto, the sleeve including a fixed collar on its inner end, a head disposed inwardly of the collar, and a screw stem on the head threaded through said collar, a mandrel mounted in the sleeve in non-turnable relation with respect thereto and slidable coaxially thereof, the mandrel normally projecting beyond the end of the socket, the outer end of the mandrel being shaped to receive in frictional relation therewith a sheet metal nut having a. peripheral edge fiange.

BENNIE A. BAKER.

REFERENCES CITED Elie following references are of record in the file of this patent:

UNITED STATES PATENTS

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