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Publication numberUS3188895 A
Publication typeGrant
Publication dateJun 15, 1965
Filing dateJan 21, 1964
Priority dateJan 21, 1964
Publication numberUS 3188895 A, US 3188895A, US-A-3188895, US3188895 A, US3188895A
InventorsJones Hobert B
Original AssigneeJones Hobert B
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Flexible chain extension or shank for tools with lock link features
US 3188895 A
Abstract  available in
Images(2)
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Claims  available in
Description  (OCR text may contain errors)

Hf B. JONES FLEXIBLE -CHAIN- EXTENSION OR SHANK FOR T ooLs June l5, 1965 I WITH Loox LINK FEATURES Filed Jan. 21. 1964 2 Sheets-Sheet 1 FIG.4

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United States Patent C 3,188,395 FLEXIBLE CHAIN EXTENSION R SHANK FOR TOGLS WITH LUCK LINK FEATURES Hubert B. Jones, 829 Kenmore Blvd., Akron, @bio Filed Ian. Z1, 1964, Ser. No. 339,193 2 Claims. (Cl. 81-I77) This invention relates to a iiexible chain extension or shank for tools, which links of the chain extension can be locked in fixed relationship to set the position of the chain after it has been iiexibly bent to the desired shape in order to provide extensions for socket wrench sets and the like to facilitate the application of the tools to, and the use of tools in hard-to-get places.

This invention is an improvement of my previous patent entitled Flexible Extension or Shank for Tools, Patent No. 3,002,409. This patent helps eliminate the typical problem, for example in U.S. Patent No. 1,316,398, and my previous patent where the links of the chain are so free and iioppy in the plane in which they have bending movement that control of the tool is diiiicult and annoying. It is highly desirable to provide a flexible extension which can then be made rigid and xed for application to nuts and bolts in locations where known tool equipment cannot function eiiciently, or at all.

f Therefore, it is the general object of the present invention to avoid and overcome the foregoing and diiiiculties of and objections to prior art practices of the type described by the provision of relatively simple, inexpensive and practically flexible extensions or Shanks for tools of `the type described Which can be made iixed and rigid after being adapted to the proper position, and which extensions will facilitate and aid a mechanic and a machinist in performing machine work otherwise impossible, particularly annoying, or diiiicult to perform because of the inaccessibility of the work.

Another object of the invention is to provide a flexible extension or shank for a tool made from a flexible chain link whereby the links can be selectively locked in iixed relationship to each other by means of small Wrenches carried in a shank member affixed to one end of the linked cnam.

Another object of the invention is to provide a chairr link extension for a socket type tool whereby longitudinally split sleeves hold the chain links together and tapered bolt means are adapted to spread the split sleeves so the sleeves engage the links and selectively lock them into fixed relationship with each other after the chain link extension has been adjusted to the proper position.

The aforesaid objects of the invention, and other objects which will become apparent as the description proceeds are achieved by providing in a tool the combination of a plurality of chain links, a plurality of hollow longitudinally split sleeve means pivotally connecting the chain links together to provide a linked chain freely bendable in one plane but not bendable in any other, an internally threaded spacer means slidably received inside each split sleeve means, tapered bolt means operatively screwed into said internally threaded spacer means and adapted to engage the inner surface of said split sleeve means to be selectively locked lin fixed relationship, a socket secured at one end of the chain and adapted to removably receive in plug-in fashion the polygonal post of a handle, and a polygonal post secured to the other end of the chain and adapted to removably receive in plug-on fashion the socket of a tool.

For a better understanding of the invention reference should be had to the accompanying drawings, wherein:

FIGURE 1 is a side elevation, partially broken away, of a flexible extension incorporating the principles of the invention;

FIGURE 2 is a fragmentary view of an embodiment of the invention in which a handle is permanently secured to a flexible shank;

FIGURE 3 is a fragmentary side elevation of a straight handle adapted to be removably secured in the socket end of the extension of FIGURE 1;

FIGURE 4 is a fragmentary side elevation of a ratchet handle adapted to be secured in the socket portion of FIGURE 1;

FIGURE 5 is a fragmentary side elevation of a rotary type handle adapted to be removably secured in the socket portion of FIGURE 1;

FIGURE 6 is a side elevation of a socket adapted to be removably secured in the plug end of the extension of FIGURE 1;

FIGURE '7 is a perspective view of an open-ended wrench having a socket portion adapted to be removably secured in the plug of the extension of FIGURE 1;

FIGURE 8 is a perspective view of a closed-end Wrench having a socket portion adapted to be removably secured in the plug of the extension of FIGURE 1;

FIGURE 9 is a horizontal cross sectional view of the link locking features of the invention taken on line 9 9 of FIGURE l;

FIGURE l0 is a plan view of the split sleeve and tapered locking nuts utilized to achieve the locking features of the invention.

FIGURE 11 is a fragmentary plan view of a polygonal plug attachment operatively afHxed by locking means to the end of the chain which plug carries locking wrenches in its body portion;

FIGURE 12 is a fragmentary elevation of the polygonal plug of FIGURE 11; and

FIGURE 13 is a fragmentary cross sectional view of a nut in a hard-to-reach position showing how the extension of the invention is easily formed to reach the nut and that it can be locked in this position.

With specific reference to the drawings, in FIGURE 1, the numeral 10 indicates generally a pivoted link chain freely bendable in one plane and having little or no bending movement in any other plane. Secured to one end of the chain is a socket member I2 adapted to removably receive in a socket recess I4 a polygonal plug of any one of a plurality of handles, for example, such as shown in FIGURES 3, 4, and 5.

The handle of FIGURE 3 includes a polygonal plug 16 and a spring detent 1S adapted to be removably received in the socket opening 14 of the socket 12.

FIGURE 4 shows a ratchet type handle with a ratchet mechanism 2li, handle 22, and a polygonal plug 24 which includes a spring detent 26 adapted to be removably received in the socket opening I4 of the socket 12.

The handle of FIGURE 5 includes a handle portion 28 rotatably receiving a rotary brace 30 which terminates in a polygonal plug 32 having a spring detent 34, and with the plug 3.?. removably fitting in the socket opening 14 of the socket I2.

9 v d The other end of the chain 10 has secured thereto a polygonal plug 36 having a spring detent 3S, the plug 36V being adapted to removably lit in any of a plurality of tools, for example, those shown in FIGURES 6 tov 8.v

In FIGURE 6 Vis shown a socket 40 having an opening 42 adapted to tit a certain size nut or bolt head, the other end of the socket having an opening 44 adapted to removably receive the polygonal 36. Y FIGURE 7 shows an open end wrench 46 having a socket opening 48 adapted to removably receive the polygonal plug 36. The socket opening 48 is adapted to receive the plug 36 and the spring detent 38 in such relation that the at plane of the wrench 46 lis parallel tothe pivotstorque can be applied through the cha-in to rotate the rliatY Wrench in its own plane. y

However, although it is desirable to mount the wrenches 46 orV 50 or the socket 40 to insure that they are parallel i 4 can be selectively locked iniixed relation to each other simply by tightening the set screws to spread the sleeves holding the links together.. As a convenient means to have wrenches available to effect the locking of the set screws, the invention con-templates that a polygonal shank 82 as shown in FIGURE 11, is operatively a'ixed to links 62a by means of. a sleeve set screw arrangement, indicated generally by numeral 60a.

The shank 82 contains a polygonal plug 84 having a detent 86 thereon. The shank 82 also contains a pair of elongated slots 88 and 90 adapted to receive a pair of Allen set screw wrenches 92 and 94, respectively. A removable collar 96 is operatively positioned over the ends of the Wrenches 92 and 94 and held in'position on the shank by a spring loaded detent` 98. Thus, the setr screw WrenchV 92 f and 94.y are operatively p positioned in the shank 82 for ready access to lock or unlock the. link portions of the extensionA of the invention, as described above with reference to FIGURES 9 and 10.

to the 4pivotsin the chain soY that torque isfapplied through y the chain, it is not absolutely necessary, as the essential and'limportant featureof the vinvention is that the individual linksr of the-chain can be locked intixed relationship to each other. In order to understand this relationship, reference should be had to FIGURE 9, wherein it is shown that the locking mechanismcomprises an outer sleeve 60 extending through aligned holes in aplurality of stacked chain links 62.v A shorter internally threaded spacery member 64 is slidably received inside the outer sleeve 60. A pair of tapered socket head set screws 66 and 68, respectively, are threadably received in thev in- Vterrial threads of thel spacer member 64. Tapered portions 70 and '72, respectively, of the setscrews 66 and 68 engage the internal surfaces of the outer sleeve 60 exert-ing outward pressure thereon as they are screwed down into the sp-acer member 64. With reference to FIGURE l0, it is seen that the outer sleeve 60 contains a longitudinal split 74 extending the length thereof. Therefore, as the tapered surfaces 70 and 72 of the set screws 66 and 68 are K screwed tightly into the spacer member 64, the outer sleeve 1 isv spread-apart along slit 74 to eifect a binding, locking action as the sleeve 60 engages against the surfaces of the holes in the links 62. A similar set screw locking sleeve arrangement is incorporated to join all of the links of the chain as well as to join the socket member 12 and the polygonal plug 36.

Also, as an important feature of the invention, it is contemplated that the spacer member 64 will be considerably shorter in length" than the sleevev 60 so that the ta-Y pered portions'70 and 72 ofthe set screws 66 and 68 can adequately engage the inner portion of the sleeve 60 to effect the spreading action described above.

and 72,` as indicated-by the angle 80 on ,surface 72, will be betweenabout 15 to about 2O degrees to eiect the spreading locking action on the sleeve 60 as the set screws are'screwed into the spacer member y64.'` It is contemplated'that both `set-`screws66 and 63 yWillbe screwed into the opposed internally threaded portions ofthe spacer member together to effect anequalspreading action to be internally tapered to receive the tapered surfaces 70 and 72 of the set screws 66 and 68, so that a smooth spreading action will be obtained when the set screws 66 and 68 are tightened. p Y

Thus, it is seen that any and all of the links in the chain Y Also, it isV contemplated that the tapered relation ofthe surfaces 70 f FIGURE 13 illustrates the chain 10 bent and Vlocked into position so that asocket 100 is adapted to be positioned over a nearly inaccessible nut 102. Note the relationship` of'an extended shank portion 82a in this situation'with a knurled handleV B2b attached thereto. It is contemplated that in the unlocked relation the link chain 10 will be stiff enough so that after it has been flexibly l adjusted to position, it can beremoved without losing the desired adjustment andfjthen lockedin position so that when force is applied to remove the vnut 102, the tool will act as a solid member. Also, it should be noted that with thelinkvchainlt) lockedinto fixed relationship, torque may be applied both lin theplane of the links and normal'to the plane of the links. However, it is generally best to force the plane of the links to prevent undue stress on the locked links. Y Y

Thus, it is seen that-an improved link chain extension which Ycan be locked into position for access to nearly vinaccessible nuts andn bolts has been provided. The locking is achieved byispreading a longitudinally split sleeve by means of taperedset-screws engaging a spacer member and being screwed thereinto to effect the spreading of the spacer sleeve. The locking wrenches can be' carried in a shank portion adjacent the handle of the link chain extension. v v

While in accordance with the patent statutes, only one best known embodiment of the invention has been illustrated and described in detil, it is to be particularly understood thatthe invention is not limited thereto or thereby, but that the inventive scope is defined in the appended claims.

What is claimed is:

Y 1. An extension for a set of socket Wrenches or the like including afpivoted link chain comprising a plurality of links freely bendable in one plane, but not bendable in any other,

/a socket secured at one end ofthe chain and adapted to removably receive Vin plug-in fashion the polygonal post of a handle,k i

a polygonal post secured to the other end of the chain Y and adapted to removably receive in plug-on fashion the socket of atool,

a plurality of sleeves split their full longitudinal length along a single line connectingthe links :of the chain together and connecting the socket andthe polygonal post to their respective ends of the chain,

an internally threadedV spacer Ymember slidably received inside each sleeve, andv tapered bolt means removably screwedinto each end of saidjspacermembers and engaging the inner surface a of said sleeves effecting spreading thereof equally l along the full length ofthe single line split to selectively lock the links, socket, and polygonal post into xed relationship to each other.

f 2. Inan extension 'for a set of socket wrenches or the like the combination lof y a pivoted link chain comprising a plurality of links freely bendable in one plane, out not bendable in any other,

a socket secured at one end of the chain and adapted to movably receive in plug-in fashion the polygonal post of a handle,

a polygonal post secured to the other end of the chain and adapted to removably receive in plug-on fashion the socket of a tool,

a plurality of sleeves split their full longitudinal length along a single line connecting the links of the chain together and connecting the socket and the polygonal post to the respective ends of the chain, and

- tapered lock bolt means removably screwed into each end of said sleeves and engaging the inner surface of said sleeves to etect equal spreading thereof at the split along their full length whereby said chain links are uniformly engaged by said split sleeves to selectively lock the links, socket, and polygonal post into fixed relationship to each other.

References Citeri ley the Examiner UNITED STATES PATENTS WLLAM FELDMAN, Primary Examiner.

MILTN S. MEHR, Examiner.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US542829 *Jan 21, 1895Jul 16, 1895 Gustav lindenthal
US1316398 *Nov 30, 1918Sep 16, 1919Peter Z SteiningerWrench.
US1350423 *Sep 5, 1918Aug 24, 1920Albert C RunkelElectric-lamp support
US2501217 *Oct 24, 1945Mar 21, 1950Cleveland Pneumatic Tool CoAdjustable drive shaft
US2997218 *Jan 21, 1959Aug 22, 1961Atlantic Machine Tool Works InContainer and attachable handle therefor
US3002409 *Apr 29, 1959Oct 3, 1961Jones Hobert BFlexible extension or shank for tools
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3467422 *May 24, 1967Sep 16, 1969Lloyd L MielkeSafety pivot connection
US4317393 *Aug 25, 1980Mar 2, 1982Kenneth GraffamExtensible torque bar
US4606247 *Sep 16, 1985Aug 19, 1986Professional Business Management AssociatesVersatile chained tool set
US5820288 *Apr 24, 1997Oct 13, 1998Splined Tools CorporationAdjustable tool with a locking hinge mechanism
US6000299 *Sep 30, 1997Dec 14, 1999Splined Tools CorporationModular tool system
US6161982 *Apr 22, 1998Dec 19, 2000Splined Tools CorporationAssembly with a sealed coupler
US6412374 *Aug 10, 2001Jul 2, 2002Chih-Ching HsiehMultisection wrench
US6840141Jan 9, 2003Jan 11, 2005Brian T. ColeRadial indexing head tool with floating splined pin
US7156003Jan 11, 2005Jan 2, 2007Cole Charles ARadial indexing head tool with floating splined pin
US7849767Jul 14, 2008Dec 14, 2010Wessel Iv Homer AConnectors for a wrench assembly
US8424845Jul 21, 2009Apr 23, 2013Indexable Tools, LLCHammer and crowbar with adjustable claw
US20050178249 *Jan 11, 2005Aug 18, 2005Cole Charles A.Radial indexing head tool with floating splined pin
US20100019214 *Jul 21, 2009Jan 28, 2010Indexable Tools, LLCHammer and crowbar with adjustable claw
US20140238204 *Sep 25, 2012Aug 28, 2014Scania Cv AbTool for fitting and removing screw means on a rear side of an object
Classifications
U.S. Classification81/177.2, 403/62
International ClassificationB25B23/00, B25B13/00, B25G1/00, B25G1/06, B25B13/48
Cooperative ClassificationB25G1/063, B25B13/481, B25B23/0085
European ClassificationB25B13/48B, B25B23/00K, B25G1/06S