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Publication numberUS2592978 A
Publication typeGrant
Publication dateApr 15, 1952
Filing dateOct 5, 1949
Priority dateOct 5, 1949
Publication numberUS 2592978 A, US 2592978A, US-A-2592978, US2592978 A, US2592978A
InventorsTrimboli Frank A
Original AssigneeTrimboli Frank A
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Retractable tool
US 2592978 A
Abstract  available in
Images(1)
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Claims  available in
Description  (OCR text may contain errors)

April 15, 1952 F. A. TRIM Ll RETRACTABLE L 5929 Filed Oct. 5, 1949 l I i IN V ENTO R. gaa/v/f/fi 75/1504 Patented Apr. 15, 1952 UNITED. STATES ()FFICE 2 Claims. 1

The invention herein disclosed relates to combination tools of the screw-driver type. Objects of the invention particularly are to provide a construction in which a screw-driver blade may be lengthened or shortened according to difierent requirements, or be entirely removed and be replaced by a different type of tool such as a wrench, chisel, punch, drill, hammer, saw

or the like.

Further important objects are toconstruct the device so as to enable the greatest and most effective use of the particular implement employed at the time.

It is for these various purposes that the tool is constructed with a handle having an axial bore extending entirely therethrough so that the shank or bit of the tool may be shifted inward or outward to a maximum extent and the end of the bit or shank actually projected through and beyond the handle for direct action thereon, as with a hammer, wrench or the like.

The other novel features of the invention and other desirable objects attained thereby are set forth and will appear in the course of the following specification.

The drawing accompanying and forming part of the specification illustrates a present com mercial embodiment of the invention. Structure, however, may be modified and changed as regards the immediate illustration, all within the true intent and scope of the invention as hereinafter defined and claimed.

Fig. 1 in the drawing is a side elevation showing the tool in use as a screw-driver, with the screw-driver bit partly extended;

Fig. 2 is a similar view showing the cap removed to expose the wrench head on the end of the handle;

Fig. 3 is an enlarged broken sectional view showing the locking ring turned on the handle into position securing the tool shank partly extended;

Figs. 4 and 5 are cross sectional views on the line 4-4 of Fig. 3, showing the ring first in the locking position and second in the release position, yieldingly retained in each of these positions by the spring detent;

Fig. 6 is a broken sectional detail showing the double spring detent for indexing both the length and the locking of the tool blade.

The handle of the tool shown at I may be of any desired size and shape to suit the general purposes of the tool, and it is provided with a rectangular or other polygonal cross section axial bore 8 extending entirely therethrough to sildingly accommodate the correspondingly shaped angular shank portion 9 of the screw-driver or other tool element It.

This construction permits the tool shank to beextended or to be retracted practically its full length. In the illustration, for example, the handle may be slipped down over the shank practically to the bit or blade portion of the screwdriver, a position where the maximum turning force may be applied closest to the Work in hand. In such case the shank may project substantially full length from the back of the handle, but this may be no objection if space is available and in many cases it is an advantage, permitting a wrench or other turning implement being engaged with the projecting part of the tool shank.

This projection of the tool shank from the back end of the handle also is advantageous where it may be necessary to apply pressure to the end of the shank, as by means of some screw or leverage mechanism engaged with a center opening H, Fig. 3, provided in the back end of the shank.

To secure the tool shank in variously projected positions there is provided in the illustration, a cap l2 rotatably sleeved over a cylindrical portion 13 at the inner end of the handle, said cap having a square or other correspondingly shaped opening M in the end Wall portion l5 of the same to pass the shank, when aligned with the bore as in Fig. 5, and to interlock over the notched or grooved portions 16 of the shank, when turned to the position shown in Fig. 4.

This locking cap is shown confined over the cylindrical end portion of thehandle by a screw I! and as limited in its angular turning movement. by an arcuate slot 18 in the end wall [5 through which the screw passes and which is just of sufiicient length to permit the cap to be turned from the locking to the unlocking position, and vice versa. I

To prevent the cap from turning and accidentally releasing the tool blade, a detent is provided in the illustration, shown as a spring pressed ball 19 seated in the cylindrical portion l 3 of the handle and designed to project into holding engagement with detent seats 20, 2|, provided inside the dependent flange or finger grip portion 22 of the cap or sleeve l2.

This flange portion of the locking element may be knurled or grooved as indicated in Figs. 1 and 2, to facilitate grip of the fingers thereon.

gThe spring detent, in addition to serving as a retainer for holding the locking sleeve in either the shank securing or release position, is also of 3 advantage as an index or feeler for indicating to the user that the sleeve is in either the shank securing or release position.

To enable the application of a wrench or other tool direct to the end of the handle, the latter is shown as having an angular head portion 23, Fig. 2.

Also, if desired, the outer end portion of the handle may have a transverse opening 24 e: tending entirely therethrough for reception of a lever for turning the tool, or a cross handle fo applying end pressure on the tool.

To protect the wrench head portion 23 at the outer end of the handle and to close over the outer end of the bore when not required for extension of a tool shank, there is provided in the illustration, a screw cap 25 detachably engageable with a screw portion 25 on the handle at the base or inner end of the wrench head.

For all ordinary uses of the tool the screw cap 25 may remain in position, as shown in Fig. 1, closing the outer end of the bore in the handle and covering the angular wrench head portion 23 of the handle. In such position this closure cap prevents the tool shank from being accidentally projected through the back end of the handle, but if it is desired to project the shank back beyond the handle, this cap can be instantly removed to permit such use of the tool.

The construction disclosed enables the handle to be used with shanks carrying all kinds of tool elements, such as those first mentioned by way of example.

The structure is simple, the parts are few in number and durable and strong. The device may be produced at low cost because machining operations required are relatively simple and inexpensive.

In addition to indexing the locking sleeve, the spring detent mechanism may be and preferably. is so designed as to index the tool shank in its length adjustment in the handle.

This is accomplished as shown in Figure 6 by locating the spring detent in the handle to line up with the grooves or notches $5 in the tool shank and by providing an additional spring pressed detent ball 21 to engage in said notches. With this construction, when the sleeve is turned to the unlocked position, Fig. 5, the shank may be slipped inward or outward in the handle, with the ball detent 2'! indexing and yieldingly holding the shank in various positions of adjustment, lined up with the notches registering with the locking sleeve and ready to be secured in any one of these positions by rotation of this sleeve to the Fig. 4, locking position.

What is claimed is:

I 1. An extensible screw-driver or similar tool comprising a longitudinal tool shank of noncircular cross section and having longitudinally spaced cross notches therein, a hand grip form of handle having a correspondingly shaped, noncircular cross sectional passage extending entirely therethrough, open at opposite ends and slidingly receiving said tool shank and thereby holding said handle and shank in non-rotatable relation in all positions of relatively longitudinal adjustment of shank and handle, a sleeve rotatably engaged on said handle and having a flange disposed over the inner end of the handle, said flange having an opening therethrough corresponding to the non-circular cross sectional shape of the passage through the handle, a spring ball detent recessed transversely in said handle with in and covered by said sleeve and yieldably en gageable with the latter for retaining said sleeve rotated in position with said flange opening in register with the passage through the handle or out of register therewith to either permit relative sliding adjustment of the tool shank and handle or the securing of the tool shank in selected position in the handle by the engagement of the flange in a selected cross notch in the shank, a wrench head on the outer end portion of the handle for engagement with and application of a wrench or leverage applying tool thereto, the tool shank having sliding adjustment within the handle suflicient to project the end of the tool shank beyond the outer end of the handle and beyond said wrench head, with the handle and tool shank still coupled in non-rotatable relation whereby a leverage applying or other turning tool may be directly applied to the outer, exposed end of the non-circular tool shank and to said wrench head, and a cap removably engageable over the outer. open end of the handle and over said wrench head to form, when in place on the handle, a guard for preventing the projection of the tool shank beyond the end of the handle and to protect the hand gripping the end of the handle, from engagement by the outer end of the tool shank.

2. An extensible screw-driver or similar tool comprising a longitudinal tool shank of noncircular cross section and having longitudinally spaced cross notches therein, a hand grip form of handle having a correspondingly shaped, noncircular cross sectional passage extending entirely therethrough, open at opposite ends and slidingly receiving said tool shank and thereby holding said handle and shank in non-rotatable relation in all positions of relatively longitudinal adjustment of shank and handle, a sleeve rotatably engaged on said handle and having a flange disposed over the inner end of the handle, said flange having an opening therethrough corresponding to the noncircular cross sectional shape of the passage through the handle, a spring ball detent recessed transversely in said handle within and covered by said sleeve and yieldingly engageable with the latter for retaining said sleeve rotated in position with said flange opening in register with the passage through the handle or out of register therewith to either permit relative sliding adjustment of the tool shank and handle or the securing of the tool shank in selected position in the handle by the engagement of the flange in a selected cross notch in the shank, a wrench head on the outer end portion of the handle for engagement with and application of a wrench or leverage applying tool there to, the tool shank having sliding adjustment within the handle sufficient to project the end of the tool shank beyond the outer end of the handle and beyond said wrench head, with the handle and tool shank still coupled in non-rotatable relation whereby a leverage applying or other turning tool may be directly applied to the outer, exposed end of the non-circular tool shank and to said wrench head, and a cap removably engageable over the outer, open end of the handle and over said wrench head to form, when in place on the handle, a guard for preventing the projection of the tool shank beyond the end of the handle and to protect the hand gripping the end of the handle, from engagement by the outer end of the tool shank, said detent including two detent balls transversely aligned in the handle, one inside projecting into the passage through the handle to engage the cross notches in the shank and the other projecting into engagement with the sleeve to hold the latter in the rotatably adjusted relations described.

FRANK A. TRIMBOLI.

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

6 e v UNITED STATES PATENTS Number??? Name Date Contal Feb. 2, 1904 Clifford Mar. 6, 1906 Contal Nov. '7, 1916 Conord Mar. 19, 1918 Flodin Sept. 19, 1922 Gutward June 5, 1923 Doppel June 10, 1924

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US751055 *Oct 15, 1903Feb 2, 1904 Camille contal
US814020 *May 19, 1905Mar 6, 1906Harlon A CliffordHand-controlled tool.
US1203853 *Feb 26, 1914Nov 7, 1916Albert T Otto & SonsExtensible tool.
US1259603 *Sep 1, 1917Mar 19, 1918Eugene L ConordCollapsible tool.
US1429861 *Sep 1, 1921Sep 19, 1922Carl M FlodinScrew driver
US1457570 *Oct 25, 1920Jun 5, 1923Guthard Edgar CTool handle and the like
US1497363 *Sep 1, 1923Jun 10, 1924Karl DoppelScrew driver
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2718249 *Apr 15, 1953Sep 20, 1955Hill Donald DRetractible tool
US2744668 *May 11, 1953May 8, 1956Joseph HenigmanAdjustable carrying handles
US2754864 *Oct 27, 1952Jul 17, 1956Elsy Walter StanleyDeep hole saw
US2821724 *Mar 2, 1955Feb 4, 1958Wurgaft Robert LSlidably housed multi-bladed tool with release selector
US2825374 *Jul 6, 1956Mar 4, 1958Reid Austin LScrew driver
US2869410 *Aug 30, 1956Jan 20, 1959Prichard William KReversible ratchet wrench with handle extension means
US2923335 *Sep 4, 1957Feb 2, 1960Joyce Martin GScrew extracting tool
US2963930 *Dec 1, 1958Dec 13, 1960Future Tool CoExtensible torque bar
US3066879 *Jun 11, 1958Dec 4, 1962Associated Electrical Ind WoolWire wrapping tool
US3255792 *Mar 18, 1964Jun 14, 1966Josef E LouisLocking device for tool handles
US4070932 *Mar 1, 1977Jan 31, 1978Jeannotte Richard WExtensible handle for a tool headpiece
US4317393 *Aug 25, 1980Mar 2, 1982Kenneth GraffamExtensible torque bar
US4409866 *Dec 28, 1981Oct 18, 1983Mcbride JoanTool handle with contoured through passageway and spring biased trigger
US4697483 *Dec 12, 1985Oct 6, 1987Rodgers Herman RTool for attaching and detaching spring clip from shaft
US4899415 *Nov 21, 1988Feb 13, 1990Peace River Arms & Accessories, Inc.Cleaning rod handle
US5020397 *Oct 16, 1989Jun 4, 1991Minuto Paul GWrench
US5195761 *Nov 25, 1991Mar 23, 1993Willi Hahn Gmbh & Co., KgChuck for tool inserts, especially screwdriver bits
US5233976 *Apr 27, 1992Aug 10, 1993Dacor CorporationSecond stage regulator hose with built-in cone adjusting tool
US5257557 *Mar 26, 1992Nov 2, 1993Vsi CorporationDriven tool locking mechanism
US5598634 *Oct 5, 1995Feb 4, 1997Martor-Argentax E.H. Beermann KgDeburring knife with adjustable handle
US5740704 *Aug 21, 1996Apr 21, 1998Payne; Jerry A.Socket wrench
US5931065 *May 19, 1997Aug 3, 1999Jackson; Roger LeeHand tool with axially repositionable shaft
US6038946 *May 19, 1997Mar 21, 2000Jackson; Roger LeeAxially repositionable adapter for use with a ratchet assembly
US6089133 *Aug 11, 1999Jul 18, 2000Liao; Youn ChyuanScrewdriver
US6408721 *May 30, 2000Jun 25, 2002Jack LeeWrench having a retractable handle
US6490761 *Feb 21, 2001Dec 10, 2002Randy C. DurrantTelescoping tool handle
US6511268 *Aug 11, 2000Jan 28, 2003Maxtech Manufacturing Inc.Tool device with reversible drill bit/screw bit
US6655243 *Oct 19, 2001Dec 2, 2003Wayne AndersonMultiple-in-1 precision hand tool
US7036404 *Mar 22, 2004May 2, 2006Mou-Tang LiouTool including bit and handle
US7089828 *Jul 26, 2004Aug 15, 2006Yeh-Hsing Enterprise Co., Ltd.Ratchet screwdriver with a quick retractable positioning joint
US7114418Sep 16, 2004Oct 3, 2006Allen William GFaucet-seat tool
US7878094Oct 4, 2007Feb 1, 2011Stanley Black & Decker, Inc.Tool with extendable handle
US8307743 *Dec 30, 2010Nov 13, 2012Hsu Shao-HsienAdjustable structure for a hand tool
US8375831 *Apr 10, 2008Feb 19, 2013Easco Hand Tools, Inc.Tool locking mechanism
US8418587Nov 6, 2009Apr 16, 2013Milwaukee Electric Tool CorporationTool bit
US8800407Feb 5, 2013Aug 12, 2014Milwaukee Electric Tool CorporationMethod of manufacturing a tool bit
US8813612Feb 15, 2013Aug 26, 2014Apex Brands, Inc.Tool locking mechanism
US20040065178 *Sep 29, 2003Apr 8, 2004Wayne AndersonMultiple-in-1 precision hand tool
US20040163501 *Feb 21, 2003Aug 26, 2004Kun-Chen ChenTool handle
US20040173061 *Mar 22, 2004Sep 9, 2004Mou-Tang LiouTool including bit and handle
US20090107303 *Apr 10, 2008Apr 30, 2009Paul SteinwegTool locking mechanism
US20120042764 *Sep 22, 2011Feb 23, 2012Trumpf Werkzeugmaschinen Gmbh + Co. KgPunching Tools and Related Machines and Methods
US20120045963 *Aug 2, 2011Feb 23, 2012Moss James PStriker for calling game and method
US20120167725 *Jul 5, 2012Hsu Shao-HsienAdjustable structure for a hand tool
DE924436C *Aug 19, 1953Mar 3, 1955Werkzeugfabrik Walter FinkeldeSchraubenzieher
EP0483703A1 *Oct 26, 1991May 6, 1992WILLI HAHN GmbH & CO. KGChuck for tool inserts, particularly for screwdriver bits
EP0745022A1 *Feb 22, 1995Dec 4, 1996Confidence Tool CompanySocket wrench
Classifications
U.S. Classification81/177.1, 16/429, 81/436, 81/177.2
International ClassificationB25B23/00, B25B15/02, B25B15/00
Cooperative ClassificationB25B23/0021, B25B23/0042, B25B23/0035, B25B15/02
European ClassificationB25B23/00A5, B25B23/00A2, B25B23/00A4, B25B15/02