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Publication numberUS3898897 A
Publication typeGrant
Publication dateAug 12, 1975
Filing dateApr 26, 1974
Priority dateApr 26, 1973
Also published asDE2420371A1
Publication numberUS 3898897 A, US 3898897A, US-A-3898897, US3898897 A, US3898897A
InventorsJauhiainen Toivo Untamo
Original AssigneeSkf Ind Trading & Dev
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Adjustable socket wrench
US 3898897 A
Abstract
An adjustable socket wrench comprising at least two gripping jaws having a concave adjusting portion which protrudes through notches in a tubular head. An adjusting socket encircles the head and is provided with means, which in cooperation with said concave surface of the gripping jaws make the jaws pivot on a guiding device between the jaws when the adjusting socket is advanced longitudinally relative to the socket wrench.
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Description  (OCR text may contain errors)

United States Patent 1191 Jauhiainen Aug. 12, 1975 [54] ADJUSTABLE SOCKET WRENCH 1,410,080 3/1922 Schwahlen 81/115 X j 1,413,444 4/1922 Williams 81/114 [75] Inventor: 1,467,735 9/1923 Morgan 81/114 Hyvmkaa, Fmland 1,485,671 3/1924 Enrick 279/70 x Assigneez Industrial Trading and Burch Development B V jutphaas 1,525,077 2/1925 Kovary... 81/1 14 2,582,444 1/1952 Lucht 81/128 NethYIaUdS 3,052,906 9/1962 Shiffman 81/114 x [22] Filed: Apr. 26, 1974 Primary ExaminerA1 Lawrence Smith [21] Appl 464999 Assistant Examiner.1ames G. Smith Attorney, Agent, or FirmWaters, Schwartz & Nissen [30] Foreign Application Priority Data 1 Apr. 26, 1973 Finland 1329 73 [57] ABSTRACT An adjustable socket wrench comprising at least two [52] U.S. Cl .1 81/114; 279/69 gr pp ng ja s ha ing a c0ncave adjusting portion 51 Im. c1. B25B 13/32 which protrudes g notches in a tubular head- [58] Field of Search 81/1 13-] 15, An adjusting socket encircles the head and is provided 81/128; 2'79/36, 40, 69, 70, 114, 116 with means, which in cooperation with said concave surface of the gripping jaws make the jaws pivot on a [56] R fe Cit d guiding device between the jaws when the adjusting UNITED STATES PATENTS socket is advanced longitudinally relative to the socket 1,284,506 11/1918 Watkins 81/113 wrench 1,390,738 9/1921 Williams 81/114 5 Claims, 12 Drawing Figures w g co ADJUSTABLE SOCKET WRENCH The present invention relates to an adjustable socket wrench comprising a head substantially circular in cross section, at least two gripping jaws symmetrical with regard to the vertical axis of the head, said gripping jaws consisting of a protruding gripping portion and an adjusting portion extending into the head, and an adjusting socket encircling the head and the adjusting portions of the gripping jaws, which socket is displaceable in the direction of the vertical axis of the head in relation to the head.

Adjustable socket wrenches which are intended to replace a whole series of fixed socket wrenches are known. A typical adjustable socket wrench is shown in US. Pat. No. 2,850,931, which socket wrench is furnished with two gripping jaws which by turning of an adjustable socket can be made to move toward and away from each other. A reduction in the jaw diameter is achieved by means of turning the adjustable socket so that the gripping jaws are urged to move away from a head. By means of guiding pivots placed transversely of the vertical axis and extending through angularly disposed notches in the gripping jaws, the gripping jaws are at the same time urged to move toward each other, whereby the jaw diameter is diminished. An increase in the diameter is produced by turning the adjusting socket in the opposite direction, whereby coil tension springs between the gripping jaws and the head pull the jaws away from each other owing to a cooperation of said pivots and notches.

An adjustable socket wrench of this type has serious drawbacks. The number of gripping jaws is limited to jaw enlargening movement produced by the coil springs, since the tensile force of the coil springs decreases after a period of use. It is therefore probable that the adjustable socket wrench according to US. Pat. No. 2,850,931 will cease to function after a period of use.

An object of the present invention is to eliminate these drawbacks and to provide an adjustable socket wrench of a simple construction, in which the movements of the gripping jaws, both ways, are guided with force without the aid of any springs. This object is achieved by the adjustable socket wrench according to the present invention which is mainly characterized in that the socket wrench is equipped with a guiding device located on the vertical axis of the head, which device is fastened to the head and which supports the adjusting portions of the gripping jaws, the surface of the adjusting portions which is turned outward from the vertical axis of the head being substantially concave, the adjusting socket being equipped with amember supporting said concave surface, whereby the size of the jaw of the socket wrench is adjusted by moving said supporting member of the socket wrench in the direction of the vertical axis along the concave surface of the adjusting portions, whereby the gripping jaws are made to swing around the guiding device. Since the movements of the gripping jaws are produced both ways directly by the adjusting socket, there is no risk of endan gering, in due course, the efficiency of the socket wrench due to springs, the spring power of which has diminished. In addition, the construction is very simple and sturdy.

An advantageous embodiment of the socket wrench according to the invention is described in greater detail hereafter with reference to the attached drawing, wherein FIG. 1 shows the adjustable socket wrench according to the invention in a closed position,

FIG. 2 shows the socket wrench in cross section along line 11-11 in FIG. 3 in an open position,

FIG. 3 shows the socket wrench from above in an open position, a

FIG. 4 shows the retaining ring in side view, partly in cross section,

FIG. 5 shows the retaining ring from above,

FIG. 6 shows the head in side view,

FIG. 7 shows the head from above,

FIG. 8 shows the head from below,

FIG. 9 shows the inner side of one of the gripping aws,

FIG. 10 shows the gripping jaw according to FIG. 9 in side view,

FIG. 11 shows the gripping jaw according to FIG. 9 from above, and

FIG. 12 shows the gripping jaw according to FIG. 10 from below.

The adjustable socket wrench according to the drawing consists essentially of a head 1 substantially circular in cross section, three gripping jaws 2 symmetrically disposed with regard to the vertical axis of the head and extending into the head, and an adjusting socket 3 encircling the head, which socket is placed on the head 1 by means of threads 4. Threadably attached to the head is a screw 5 located on the vertical axis of the head and supporting at its other end a guiding device 6, which is essentially of a ball-shape. Fastened to the upper end of the head is a cover with a screw 8, and between the adjusting socket 3 and the cover 7 is arranged a retaining ring 9, which is pressed against the adjusting socket by a spring 10. The retaining ring 9 has a projection 11 fitting in grooves 12 at the upper edge of the adjusting socket 3. The inner periphery of the retaining ring 9 also has a projection 13 fitting in a channel 14 in the head 1 (FIG. 6), whereby the retaining ring is prevented from rotating around the head.

The gripping jaws 2 consist essentially of two portions, a gripping portion 15 protruding from the head, and an adjusting portion 16 essentially located within the head. The gripping portion is equipped with a groove 17, in which e.g., a nut can be fitted.

The adjusting portion of each jaw has on its side turned toward-the vertical axis a recess 18 of such shape that the ball-shaped guiding device 6 is fitted therein. The opposite side of the adjusting portion is substantially concave. Right in front of the adjusting portions, the head 1 is furnished with longitudinal notches 19 (FIG. 6) locking the gripping jaws laterally when turning the socket wrench and through which the adjusting portions may partly protrude. As can be seen especially from FIGS. 9 and 10, the lower gripping portion of the gripping jaws is considerably wider than the upper adjusting portion, and the adjusting portion is in general curved.

The inner surface of the adjusting socket 3 has a pe ripheral bulge 20, the upper edge of which (FIG. 2) supports the concave surface of the protruding adjusting portion at a point above the guiding device 6. In addition, the lower edge of the adjusting socket 3 abuts the concave surface of the adjusting portion at a point below the guiding device 6 (FIG. 2). The gripping jaws 2 thus have three supporting points, i.e., the two above mentioned points on the concave surface as well as the supporting surface against the guiding device 6 located between the two first mentioned points. The adjusting portion accordingly forms a lever arm.

The adjustable socket wrench according to the invention operates as follows:

When the socket wrench is opened from the closed position in FIG. 1 to the position in FIG. 2, the retaining ring is lifted upwards against the action of the coil spring 10 until the projection 11 is located above the upper edge of the adjusting socket, whereby the retaining ring no longer prevents the turning motion of the adjusting socket. Thereafter the adjusting socket 3 is turned until the projection 11 is located right above a groove 12, at which the measure of the nut or screw head to be turned is indicated. When turning the adjusting socket 3, it rises at the same time upwards (FIG. 2) in the direction of the vertical axis due to the action of the threads. Hereby the supporting points of the adjusting socket bearing against the concave surface of the adjusting portion move upwards, as a result of which the gripping portions of the gripping jaws move away from each other and the upper ends of the adjusting portions move toward each other. Thus the gripping jaws perform a pivoting movement around the guiding device 6 under a guided motion of the bulge and the lower edge 21 of the adjusting socket. When the opening'between the gripping jaws is of a desired size, the retaining ring 9 is released and it moves downwardly onto the adjusting socket so that the projection 11 enters the desired groove 12, whereby the adjusting socket is locked with respect to the head. Finally an ordinary lever arm is insertedin an opening 22 in the head, and the nut engaged in the jaws is turned.

When turning the adjusting socket in the opposite direction, the supporting points of the adjusting socket bearing against the concave surfaces of the adjusting portions of the jaws move downwards in FIG. 2, as a result of which the gripping portions of the jaws move toward each other.

It should be noted that the range of regulation of the socket wrench can easily be adjusted by raising or lowering the guiding device 6 (FIG. 2), which in turn is effected by turning the screw 5.

The drawing and description are only intended to illustrate the concept of the invention, and the socket wrench according to the invention can be considerably varied within the framework of the appended claims. The number of gripping jaws can, of course, deviate from three, since the construction in no way prevents the use, for example, of two gripping jaws. Likewise, the supporting member of the adjusting socket (the bulge 20 and the lower edge of the socket) can be formed in a number of different ways without departing from the lever arm principle. The guiding surface of the adjusting portion has been referred to as concave, but it need not be such in the strictest sense of the word, and in practice, for example, a saddle-shaped surface according to the drawing is more fit for this purpose.

What I claim Is;

"1. In an adjustable socket wrench having a substantially vertical head which is substantially circular in cross section, at least two gripping jaws symmetrically disposed with regard to the vertical axis of the head, each jaw having a protruding gripping portion, and an adjusting portion extending into the head and through a notch provided in said head, and an adjusting socket surroudning the head and the adjusting portions of the gripping jaws, said socket being mounted on the head so' as to be vertically movable thereon, an improvement comprising a guiding device mounted on the vertical axis of the head and pivotably supporting the adjusting portions of said gripping jaws, said adjusting portions of the jaws having outer surfaces which are substantially concave, said adjusting socket including means for contacting said concave surface of each jaw to adjust the size of the jaws of the socket wrench by relative vertical movement of said adjusting socket with respect to said head to cause the gripping jaws to pivot around said guiding device.

2 An adjustable socket wrench according to claim 1, wherein said guiding device comprises a ball and a shank supporting said ball and threaded in said head suchthat the position of the ball with regard to the head can be adjusted by threadably adjusting the shank in the head, said adjusting portions of the gripping jaws having corresponding recesses which accommodate said ball.

3. An adjustable socket wrench according to claim 1, wherein the notches in the head extend longitudinally adjacent said adjusting portions, said adjustingportions extending through said notches so that the concave surfaces of said adjusting portions abut said means on the adjusting socket which adjusts the size of the jaws of the wrench.

4. An adjustable socket wrench according to claim 1, wherein said means on the adjusting socket contact eachsaid concave surface at two points respectively located above and below said guiding device.

5. An adjustable socket wrench according to claim 4, wherein said means on the adjusting socket for contacting said adjusting portion of each jaw comprises an encircling bulge on the inner surface of said adjusting socket and a lower edge of the adjusting socket.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US1284506 *Apr 27, 1918Nov 12, 1918Percy G WatkinsWrench.
US1390738 *Sep 14, 1920Sep 13, 1921Williams Owen JSocket-wrench
US1410080 *Dec 1, 1921Mar 21, 1922Josef SchwahlenChuck
US1413444 *Jun 11, 1921Apr 18, 1922Williams Owen JSocket wrench
US1467735 *Jun 9, 1922Sep 11, 1923Albert Morgan LouisWrench
US1485671 *Jun 23, 1922Mar 4, 1924Eastern Tube And Tool CompanyChuck
US1499639 *Dec 7, 1922Jul 1, 1924Burch Lawrence AChuck
US1525077 *May 3, 1924Feb 3, 1925Eugene KovaryAdjustable gripping tool
US2582444 *Nov 25, 1949Jan 15, 1952Lucht Donald CCam actuated slidable jaw wrench
US3052906 *Sep 21, 1960Sep 11, 1962Jerome ShiffmanTools for removing and fitting watch crystals
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US4911040 *Mar 6, 1989Mar 27, 1990Kim Ee JAdjustable socket wrench
US5531549 *Nov 4, 1994Jul 2, 1996Great Bay Tool CorporationAuto-lock drill chuck
US6167605Sep 12, 1997Jan 2, 2001Advanced Cardiovascular Systems, Inc.Collet type crimping tool
US6481262Jun 20, 2001Nov 19, 2002Advanced Cardiovascular Systems, Inc.Stent crimping tool
US6510722May 10, 2000Jan 28, 2003Advanced Cardiovascular Systems, Inc.Stent crimping tool for producing a grooved crimp
US6568235Aug 10, 2000May 27, 2003Advanced Cardiovascular Systems, Inc.Assembly for crimping an intraluminal device or measuring the radial strength of the intraluminal device and method of use
US6651478Nov 28, 2001Nov 25, 2003Advanced Cardiovascular Systems, Inc.Assembly for crimping an intraluminal device or measuring the radial strength of the intraluminal device and method of use
US6840081Nov 18, 2002Jan 11, 2005Advanced Cardiovascular Systems, Inc.Assembly for crimping an intraluminal device or measuring the radial strength of the intraluminal device and method of use
US8485070 *Oct 29, 2010Jul 16, 2013Jpj Investment Holding Corp.T-handle wrench
US8800408 *May 11, 2011Aug 12, 2014Omega S.A.Tool system for the extraction of watch bezels
US20110100166 *Oct 29, 2010May 5, 2011Hrayr DarbinyanT-handle wrench
US20110277596 *Nov 17, 2011Omega S.A.Tool system for the extraction of watch bezels
EP0903122A2 *Sep 14, 1998Mar 24, 1999Advanced Cardiovascular Systems, Inc.Collet-type crimping tool
Classifications
U.S. Classification81/114, 279/69
International ClassificationB25B13/00, B25B13/44
Cooperative ClassificationB25B13/44
European ClassificationB25B13/44