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Publication numberUS3919541 A
Publication typeGrant
Publication dateNov 11, 1975
Filing dateJul 11, 1974
Priority dateJul 11, 1974
Publication numberUS 3919541 A, US 3919541A, US-A-3919541, US3919541 A, US3919541A
InventorsChao Albert A
Original AssigneeChao Albert A
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Screw driver{3 s light
US 3919541 A
An improved screw driver that includes a slidable block along its shank, the block containing a battery, switch and lamp for directing light rays toward the screw driver blade in order to illuminate a screw being turned which is in a dark area, and the block also having a magnet so to hold the screw driver to any steel surface and permit to be used as a flash light.
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Claims  available in
Description  (OCR text may contain errors)

United States Patent [191 Chao [ 1 Nov. 11, 1975 SCREW DRIVERS LIGHT [76] Inventor: Albert A. Chao, 407 Glendale Road,

Northvale, NJ. 07647 [22] Filed: July 11, 1974 [21] Appl. No.: 487,790

[52] US. Cl 240/646; 240/5215 [51] Int. Cl.'- 1343K 29/10; F21V 33/00 [58] Field of Search..... 240/2 MT, 2 E, 6.4 R, 6.46,

[56] References Cited UNITED STATES PATENTS 2,673,284 3/1954 Henderson 240/2 E 2,773,974 12/1956 Markett 240/646 3,185,832 5/1965 Nagamori 240/646 3.713.614 1/1973 Taylor 240/5215 3.820.795 6/1974 Taylor 240/64 R Primary E.\'uminerRichard M. Sheer Attorney, Agent, or FirmRichard L. Miller 5 7] ABSTRACT An improved screw driver that includes a slidable block along its shank, the block containing a battery. switch and lamp for directing light rays toward the screw driver blade in order to illuminate a screw being turned which is in a dark area, and the block also having a magnet so to hold the screw driver to any steel surface and permit to be usedas a flash light.

1 Claim, 3 Drawing Figures U.S. Patent Nov. 11, 1975 SCREW DRIVERS LIGHT This invention relates generally to screw drivers.

It is well known that at times a person is obliged to place or remove a screw that is in a dark area, so that a separate flashlight must be employed to accomplish the task. Often there is not enough space for placement of a flashlight .in the area, or the use of a flashlight necessitates a second person to hold it while a first persons hands are both busy holding the screw and the screw driver. This situation is accordingly in want of an improvement.

Therefore, it is a principle object of the present invention to provide a screw driver that incorporates its own light for illuminating a screw being turned, and the vincinity thereof where the light is needed, and which thus eliminates the employment of external lighting means.

Another object is to provide a screw drivers light that takes up no additional space than a conventional screw driver.

Still another object is to provide a screw drivers light wherein the tool can be used as a flashlight for other than screw turning purposes.

Still a further object is to provide a screw drivers light which would be particularly useful to T.V. Service men, plumbers, electricians and others who make household service calls and are often obliged to work in inadaquately lighted areas.

Further objects of the invention will appear as the description proceeds.

To the accomplishment of the above and related objects, this invention may be embodied in the form illustrated in the accompanying drawings, attention being called to the fact, however, that the drawings are illustrative only, and that changes may be made in the specific construction illustrated and described within the scope of the appended claims.

FIG. 1 is a perspective view of the invention.

FIG. 2 is a side view thereof in use and illustrated partly in cross section.

FIG. 3 is an electric circuit thereof.

Referring now to the drawing in detail, the reference numeral represents a screw drivers light according to the present invention wherein there is a steel, straight, elongated shaft or shank 11 which at one end is fitted into a handle 12. The opposite end of the shank is flattened so to form a flat blade 13 for being fitted into a screw head slot in order to turn the screw.

In the present invention, a block 14 made preferably from hard plastic, has a longitudinal central opening 15 therethrough for being slidably carried on the shank, and which is movable thereupon between the blade 13 and an end wall 16 of the handle.

A permanent magnet 17 is imbedded within the block and protrudes outwardly from a cylindrical side wall 18 thereof in order that it can magnetically be attached to any steel supporting surface, and that support the screw driver in use.

The block 14 has a threaded end cap 19 on one end so to enclose an interior chamber 20 within which there is contained a dry cell, 1.5V. battery 21, an electric switch 22 having externally extending switch slide button 23 for manual operation, and a lamp 24 that is positioned in alignment with an opening 25 through the end cap 19 in order to shine upon the screw driver blade 13.

In operative use, as shown in FIG. 2, the device can be attached by its magnet 17 to any steel surface 26 when it is intended for use as a flashlight for illumination purposes only. When the device is used for illuminating a screw 29 that is to be turned, the light rays 28 from the lamp are directed thereupon so work can be done in otherwise unlighted areas, such as within the interior of a T.V. set, or within dark corners of a house or basement. It is to be noted that the inner surface of the magnet abuts the steel shank 11 and may be correspondingly concave, so that the magnet retains the block at any set position along the shank, thus focusing the light at a desired distance from the work. In some situations the screw driver can be supported from steel surface 26, and a work can be brought into position for a screw to be turned (as shown in FIG. 2); the block thus serving as a holder for allowing the screw driver to freely turn an illuminated screw.

While certain novel features of this invention have been shown and described and are pointed out in the annexed claims, it will be understood that various omissions, substitutions and changes in the forms and details of the device illustrated and in its operation can be made by those skilled in the art without departing from the spirit of the invention.

What is claimed is:

l. A light for use with a screwdriver having a straight steel shank, a handle on one'end of the shank and an opposite end of the shank being flattened into a screwhead slot fitting blade; said light comprising means for illuminating a screw being turned by the blade of the screwdriver, said means comprising a block having a central opening extending therethrough for slidably receiving the shank of the screwdriver, said block carrying a dry cell battery, switch and lamp in electric circuit for producing light rays directed toward the blade of the screwdriver, a permanent magnet embedded within said block having an outer surface protruding from a side of said block for magnetic securement to any steel surface and an inner surface protruding into the opening extending through the block for retaining said block in adjustably selected positions along the shank of the screwdriver.

2. The combination as set forth in claim 1 wherein said inner end of said magnet is concave in shape corresponding to a cylindrical surface of said shank.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US2673284 *Dec 4, 1950Mar 23, 1954Roy Henderson MalIlluminated screw driver
US2773974 *Dec 5, 1955Dec 11, 1956George MarkettFlashlight screw driver
US3185832 *Dec 20, 1961May 25, 1965Tadayuki NagamoriIlluminated screw driver
US3713614 *Dec 23, 1970Jan 30, 1973Taylor EFlashlight holder
US3820795 *Aug 9, 1973Jun 28, 1974Taylor DGolf swing training device
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US4266587 *Aug 1, 1979May 12, 1981Wood Ray EManual tool
US4440048 *Jul 9, 1981Apr 3, 1984Mic Manufacturing And Machine Works Ltd.Fastener driving device with multiple bits
US4480295 *Mar 21, 1983Oct 30, 1984Shuster Frank JWork surface light
US4768137 *Aug 4, 1987Aug 30, 1988Hwaw Hong LScrewdriver structure with illuminating function
US4941073 *Oct 24, 1989Jul 10, 1990Bolton Ronald RWedge shaped flashlight
US5211468 *Sep 4, 1992May 18, 1993Jeng Jong PyngScrew driver having an illuminating unit mounted thereto
US5845986 *Aug 15, 1997Dec 8, 1998Breen; William CharlesLight for manual rotary tool
US5913596 *Jul 20, 1998Jun 22, 1999Lin; Wan-ChangMultifunctional screwdriver
US6030090 *Jul 29, 1998Feb 29, 2000Huang; Sunny En-LiungCombination screwdriver with illumination
US6030092 *Apr 29, 1998Feb 29, 2000Mccalla Company D/B/A Ovation GroupLight handle
US6116747 *Feb 1, 1999Sep 12, 2000Design Guidance Inc.Flashlight
US6296365Feb 4, 2000Oct 2, 2001Mccalla CompanyLighted hand tool
US6318874Jun 28, 2000Nov 20, 2001Makita CorporationPower tools having lighting devices
US6364500Nov 17, 1999Apr 2, 2002Mccalla CompanyLighted handle
US6419371Jan 14, 2000Jul 16, 2002Ovation Group, Inc.Lighted tool
US6428180 *Jul 20, 2000Aug 6, 2002Mickey M. KarramSurgical illumination device and method of use
US6494590Jul 28, 2000Dec 17, 2002Makita CorporationPower tools having lighting devices
US6511200Sep 12, 2001Jan 28, 2003Makita CorporationPower tools having timer devices
US6890135Aug 24, 2004May 10, 2005Credo Technology CorporationPower tool with light emitting diode
US6918331Apr 17, 2001Jul 19, 2005Makita CorporationLighted cutting tools
US7094011Mar 31, 2005Aug 22, 2006Credo Technology CorporationPower tool
US7131180Jan 7, 2004Nov 7, 2006Credo Technology CorporationAttachment for power tool
US7377202May 12, 2000May 27, 2008Makita CorporationLighted power tools
US7393114 *Sep 9, 2004Jul 1, 2008Devlin Joseph ELighted grip and alligator clip cord for tattoo machine
US7401938 *Aug 3, 2007Jul 22, 2008Chin-Shun ChengExtension bar with built-in light
US7611256 *Oct 12, 2007Nov 3, 2009Medic.Nrg Ltd.Illuminator for medical use
US7854054Oct 6, 2006Dec 21, 2010Robert Bosch Tool CorporationAttachment for power tool
US8317350Sep 30, 2010Nov 27, 2012Black & Decker Inc.Power tool with a light for illuminating a workpiece
US8328381Feb 25, 2009Dec 11, 2012Black & Decker Inc.Light for a power tool and method of illuminating a workpiece
US8820955Jul 2, 2013Sep 2, 2014Black & Decker Inc.Power tool with light emitting assembly
US8827483Sep 14, 2012Sep 9, 2014Black & Decker Inc.Light for a power tool and method of illuminating a workpiece
US9028088Jul 19, 2012May 12, 2015Black & Decker Inc.Lighted power tool
US9225275May 18, 2012Dec 29, 2015Black & Decker Inc.Power tool with light unit
US9242355Apr 17, 2012Jan 26, 2016Black & Decker Inc.Illuminated power tool
US9328915Jan 25, 2013May 3, 2016Black & Decker Inc.Lighted power tool
US9352458Jul 18, 2013May 31, 2016Black & Decker Inc.Power tool with light for illuminating workpiece
US9486890 *Jul 8, 2014Nov 8, 2016The Boeing CompanyBlast nozzle targeting apparatus
US9644837Apr 8, 2015May 9, 2017Black & Decker Inc.Lighted power tool
US9722334Apr 4, 2011Aug 1, 2017Black & Decker Inc.Power tool with light unit
US9782865 *Dec 1, 2015Oct 10, 2017C. & E. Fein GmbhPositioning aid for a core drilling machine
US20050025599 *Aug 24, 2004Feb 3, 2005Credo Technology CorporationPower tool with light emitting diode
US20050081364 *Jan 7, 2004Apr 21, 2005Credo Technology CorporationAttachment for power tool
US20050090851 *Sep 9, 2004Apr 28, 2005Devlin Joseph E.Lighted grip and alligator clip cord for tattoo machine
US20050166741 *Mar 31, 2005Aug 4, 2005Credo Technology CorporationPower tool
US20070022595 *Oct 6, 2006Feb 1, 2007Credo Technology CorporationAttachment for power tool
US20090097270 *Oct 12, 2007Apr 16, 2009Arie BeckerIlluminator for medical use
US20120116368 *Oct 26, 2011May 10, 2012Viola Frank JSurgical instrument with add-on power adapter for accessory
US20160151873 *Dec 1, 2015Jun 2, 2016C. & E. Fein GmbhPositioning Aid For A Core Drilling Machine
USD785839Apr 26, 2015May 2, 2017Joseph Samuel AndersonFlashlight
CN105014588A *Aug 23, 2015Nov 4, 2015庄森彬Pressure and photosensitization combined light emitting magnetizing screwdriver
CN105834986A *May 17, 2016Aug 10, 2016深圳供电局有限公司Combined screwdriver illumination device for electrical equipment maintenance
EP0044641A1 *Jul 2, 1981Jan 27, 1982Mic Manufacturing And Machine Works LimitedDriving device for rotatable fasteners
EP2976015A4 *Feb 20, 2015Mar 9, 20163Dintegrated ApsA set comprising a surgical instrument
WO2014138389A1 *Mar 6, 2014Sep 12, 2014International Development LLCCompact lighting device
U.S. Classification362/120, 362/398
International ClassificationB25B23/00, B25B23/18
Cooperative ClassificationB25B23/18
European ClassificationB25B23/18