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Publication numberUS2046838 A
Publication typeGrant
Publication dateJul 7, 1936
Filing dateJul 3, 1934
Priority dateJul 3, 1934
Publication numberUS 2046838 A, US 2046838A, US-A-2046838, US2046838 A, US2046838A
InventorsHenry F Phillips
Original AssigneePhillips Screw Co
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Screw driver
US 2046838 A
Abstract  available in
Previous page
Next page
Claims  available in
Description  (OCR text may contain errors)

y 1, 1936. H. F. PHILLIPS "2,0 6,838


f BY 49% ATTORNEY Patented July 7, 1936 UNITED STATES PATENT OFFICE assignments, to Phillips Screw Com- D M, Wilmington, DeL, a corporation of Dela Application July 3, 1934, Serial No. 733,622

2 Claims. (Cl. 145-50) This invention relates to improvements in driver particularly adapted for operative engagement with the type of screw shown and described in my co-pending application filed concurrently herewith and entitled Screws, Serial Number 733,623.

The present invention comprises a shank formed at one of its ends with a plurality of dial0 metrically opposed flutes, each of which is made up of flat tapering and converging side walls which originate at equidistant points on the surface of the shank spaced from the end thereof and diverge toward the end of the tool for a portion of their length. For the remaining portion of their length they merge into lands or vanes which are formed with flat tapering outer walls having parallel edges substantially throughout their entire length.

The principal object of the invention is the provision of a tool of this character particularly adapted for precise and firm engagement within a recess of corresponding shape punched or otherwise formed in a screw head. And likewise, the provision of a tool wherein the recessengaging lands or vanes are formed with parallel edges throughout their length.

These and other objects will appear as my invention is more fully hereinafter described in the following specification. illustrated in the accompany-ing drawing, and finally pointed out in the appended claims.

In the drawing:

Figure 1 is an enlarged fragmentary view of the lower end of a shank formed into a bit in accordance with my invention.

Figure 2 is a slightly reduced view of the bit turned through 45 degrees from the position shown in Figure l.

Figure 3, is a bottom end view of Figure 2.

Figure 4 is a sectional plan view of the bit, taken along the line 4-4 0! Figure 1.

Referring now more particularly to the drawing:

The invention comprises a shank l, formed at its lower end with a plurality of flutes, generally indicated at 2, which originate from points 3, located on the peripheral surface of the shank and which are spaced, as shown, from the lowermost end of the shank. Each flute comprises two flat side walls 4 and 5, which converge throughout their length along a line extending from the points of origin 3 to the lowermost end of the shank. 5

The outer edges of the walls diverge from their points of origin for the major portion 'of their length to points 6 and I, from whence they converge downwardly in parallel edges 8, to a point on the axis of the shank and thus iorm lands, or 10 vanes 9, which are formed with flat outside walls l0 having parallel outside edges throughout their length.

This particular form of driver, as previously stated, is especially designed for operative en- 15 gagement with the type of screw shown and de-- scribed in my co-pending application, hereinabove referred to. The vanes 9 and the angular walls therebetween are formed along precisely the same angular lines as those of the tool-re- 2 ceivlng grooves of the recess shown in the screw.

As a matter of fact, the punch used for producing the recess in the screw is identical with the driver, herein described, in every respect.

I claim: 35

1. A tool comprising a shank and a bit, said bit comprising a plurality of diametrically opposed vanes, each of said vanes having a fiat outside wall with parallel edges, and each of the recesses between said vanes comprising two flat side walls so diverging outwardly from a line extending from a point of origin on the shank to a point on the end of the shank, said parallel edges being formed by the conjunction of said outside wall with said recess side walls.

2. A tool comprising a shank and a bit, the end of said bit comprising a plurality of radially disposed screw engaging vanes and flutes, each vane comprising an outside wall Joining two side walls. the junction of said side walls with said outside wall forming parallel corner edges, the said outside walls of said vanes being inclined toward each other and toward the end of said bit, and the said side walls of adjacent vanes intersecting along lines inclined downwardly and inwardly from points of origin on the shank toward the end of said bit to form said flutes.

Imimir r. PHILLIPS.

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2632955 *Jul 7, 1949Mar 31, 1953Nat Screw & Mfg CompanyApparatus for checking recesses in recessed head screws
US2800936 *Sep 15, 1955Jul 30, 1957Wesloc Screw IncCruciform screw driver
US4998454 *Nov 20, 1989Mar 12, 1991Black & Decker Inc.Screwdriver bit for phillips-head fasteners
US5660091 *Feb 8, 1996Aug 26, 1997Walter Lorenz Surgical, Inc.Blunt-nosed, self-retaining screwdriver
US8166851May 1, 2012Robert Bosch GmbhCombination driving tool for phillips and robertson fasteners
US20060112797 *Nov 15, 2005Jun 1, 2006Frank ZuckerUniversal screw driver blade for recessed cross-slot head screws
US20100037737 *Jun 1, 2009Feb 18, 2010Credo Technology CorporationCombination driving tool for phillips and robertson fasteners
DE966464C *Dec 28, 1949Aug 8, 1957Guest Keen & Nettlefolds LtdSchraube
DE1160378B *Oct 31, 1958Dec 27, 1963Gkn Screws Fasteners LtdSchraubendreher fuer Kreuzschlitzschrauben
EP0369655A2 *Nov 3, 1989May 23, 1990Black & Decker Inc.Improved screwdriver bit for Phillips-head fasteners
U.S. Classification81/460, 411/919
International ClassificationF16B23/00, B25B15/00
Cooperative ClassificationF16B23/0023, Y10S411/919, B25B15/005
European ClassificationB25B15/00B2B, F16B23/00B4