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US3269250A - Universal screw head - Google Patents

Universal screw head Download PDF

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Publication number
US3269250A
US3269250A US37999364A US3269250A US 3269250 A US3269250 A US 3269250A US 37999364 A US37999364 A US 37999364A US 3269250 A US3269250 A US 3269250A
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Prior art keywords
screw
head
slots
driving
type
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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Lawrence M Curtiss
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Thomas and Betts Corp
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Thomas and Betts Corp
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16BDEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS, WEDGES, JOINTS OR JOINTING
    • F16B23/00Specially shaped nuts or heads of bolts or screws for rotations by a tool
    • F16B23/0007Specially shaped nuts or heads of bolts or screws for rotations by a tool characterised by the shape of the recess or the protrusion engaging the tool
    • F16B23/0023Specially shaped nuts or heads of bolts or screws for rotations by a tool characterised by the shape of the recess or the protrusion engaging the tool substantially cross-shaped
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10STECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S411/00Expanded, threaded, driven, headed, tool-deformed, or locked-threaded fastener
    • Y10S411/919Screw having driving contacts

Description

United States .Patent O 3,269,250 UNIVERSAL SCREW HEAD Lawrence M. Curtiss, Mountainside, NJ., assignor to The Thomas & Betts Co., Elizabeth, NJ., a corporation of New Jersey Filed July 2, 1964, Ser. No. 379,993 4 Claims. (Cl. 85-45) The present invention relates to thread'ed fasteners generally and more particularly to a universal head for screws, bolts and the like of various kinds having a subsantially flat Fillister like head portion with a cavity and cross slots recessed therein.

More specifically, the invention relates to screws generally which are provided with a cross slotted driving recess in .the head thereof, whereby to selectively accommodate each of several conventional d-riving instrumentalities therein, the invention residing in the addition thereto of integral means for guiding or deflecting the working end of a winged driving tool into its recess, and a bladed tool into alignment with one or both of said slots in said screw head when brought into Contacting relation th'erewith.

Prior art screw heads of this character while considered satisfactory in many applications possessed particular disadvantages in that considerable `difliculty was often experienced in quickly aligning and inserting a single or crossbladed driving tool into one or both of a pair of intersecting slots in such screw heads particularly when the sc-rews are part of small electrical fittings, for example, which fittings are often used in junction boxes and other close and/or difficult quarters where a clear and full sight approach to a set screw, for example, cannot be had. Thus, a screw head which avoids or greatly reduces such difiiculties in the manipulation thereof is highly desirable and useful.

Accordingly, it is an object of the invention to provide an improved cross-slotted and/or axially recessed screw head which is adapted for automatically angularly deflecting a conventional driving tool into central alignment with 'either one or both of said cross slots when brought into contact with said screw head.

A further object of the invention is to provide an improved cross slotted and/ or axially indented flat Fillister type screw head which is adapted to be .readily engaged and actuated by either one of several conventional screw drivers of compatible size as for example, a single blade, cross blade, pointed, winged Phillips type, or a driving tool having a flat ended square shank.

Another object of the invention is to provide an improved cross slotted and/or axially recessed Fillister type screw head in the use of which an operator need only point a selected driving tool to the approximate center thereof and the tool moved into coactable contacting relation therewith, whereby the driving tool is automatically centered and oriented into alignment with and guided into either one or both of said cross slots and a recess in the intersection thereof.

With the above and other objects in View, the invention resides in the novel construction, combination, and arrangement of elements, the novel features of which are set forth with particularity in the appended claims, the invention itself, however, both as to the combination therein and method of operation together with additional objects and advantages thereof, being best understood from the following description of a specific embodiment thereof, when taken in connection with the accompanyng drawing in which:

FIGURE 1 is a perspective vi'ew showing a Fillister type of screw head as provided with a pair of cross slots, a cavity formed in the slot intersection on the screw axis,

3,209,250 Patented August 30, 1966 ice and a pair of oppositely inclined flat surfaces formed on each of the angularly spaced head portions formed by said intersecting slots in accordance with .the invention;

FIGURE 2 is a top plan view of the same;

FIGURE 3 is a Sectional view taken on the line 3-3 of FIGURE 2; and FIGURE 4 is a similar Sectional View illustrating a modification of the screw head in FIGURE 3.

Referring to the drawing, a screw head formed in accordance with the invention is indicated at 10 in which a pair of lrectangular slots 12 and 14 are formed in inters'ecting relation and substantially at right angles on the screw axis. Both of the intersecting slots are identical, of the same depth, and both extending diametrically across the entire diameter of the screw head 10, which is straight and of substantially uniform diameter and of la length proportional to the threaded shank 16 `of the screw after the manner of conventional flat head Fillister type machine screws. The side walls of the slots 12 and 14 are parallel respectively Ithroughout their entire extent and are slightly inclined or diverge outwardly from the bottom thereof to their upper defining edge to readily receive tapered single blade screw drivers.

The bottom of the slots 12 and 14 are flat surfac'es, all of which lie in the same surface of lrevolution except for a center clearance cavity or indentation 18. The center cavity 18 is in the form of an inverted cone with a rounded a-pex 20 located on the screw axis with th'e diameter at the top of the cavity slightly larger than the width of the slots as clearly shown in FIGURES l and 2.

It will be noted that the intersecting slots form a plurality -of diametrically opposite, angularly spaced triangular head portions or segments 22 with their inner corner portions 24, disposed radially of the screw axis and projecting substantially over or into the cavity 18, whereby they are adapted for driving engagement with either of a plurality of different known driving tools.

In accordance with the invention, the top face or crown of each of the plurality of angularly spaced head portions or segments 22, is in .the form of a compound angle by reason of the fact that its surface is inclined radially downwardly from its peripheral edge to its inner corner 24, located at or over the central cavity 20, and also inclined angularly or circumferentially in opposite directions downwardly to and terminating at its adjacent slot defining edge whereby a line or ridge 26, extending radially across the center of each of the segments 22, divides the same into two sloping triangular surfaces 28. Thus, the compound angle formed on the top face or crown of each of the head portions 22, provides the means whereby a driving instrumentality is deflected toward the center of the screw head 10, and into the cavity 18, and at the same time oriented into alignment with either or both of the intersecting slots 12 and 14, upon being brought into contacting engagement with the top face or crown of the segments 22.

While the cavity 18 on the axis of the screw head 10, as best shown in FIGURE 3, merely provides clearance for pointed, winged driving tools, similar winged driving tools having a blunt end require little or no clearance. Thus, to accommodate all kinds of winge-d type screw drivers, the bottom of the slots 12 and 14 may slope slightly downwardly toward the axis of the screw as at 30 and the depth thereof increased slightly whereby the clearance cavity 18 may be dispensed with as clearly shown in FIGURE 4.

While the screw head shown is of the machine type, the recessed head 10 is nevertheless adapted to be formed on other screws such as wood screws and on |bolts, and even applied to the headless end of a common shaft or screw shaft.

Thus, when a driving tool of the conventional blade type, cross blade type, pointed winged type, or the square shank type, is brought into contacting engagement with the screw head and not in the center thereof, the oppositely inclined top faces 28 of the segments 22, will deflect and orient the tool into the cavity 18, and into alignment with either or both of the intersecting slots 12 and 14. As aforesaid, the length of the screw head 10 and the diameter thereof is substantially of the Fillister type depending of course upon the size of the screw thread which, -for the purpose of this invention, may vary from size 4 to 20, for example.

While the invention has been illustrated and described with respect to certain embodiments thereof, it is to be expressly understood that various changes and modifications may be made therein without departing from the inventive concept underlying the same. Therefore, the invention is not to be limited except as is necessitated by the prior art and the scope of the appended claims.

What is claimed is:

1. A screw head of substantial length and uniform diameter having a cross-slotted driving recess centrally thereof forming a plurality of diametrically opposite triangular segments, each of said segments presenting a slightly inclined upstanding corner edge radially of and adjacent the screw head axis adapted to be engaged by a winged type driving tool, each of said segments having a top face and a ridge extending radially of said screw head and bisecting said segment, said top face being inclined downwardly radially toward the screw head axis.

and inclined downwardly in opposite directions lfrom said ridge so as to define a pair of sloping triangular surfaces the terminal edges of which define the cross-slots and Which are adapted to deflect a bladed driving tool into alignment with the slots in said recess when brought intol contacting engagement with said screw head.

2. A screw head as defined in claim 1 and further in- References Cited by the Examiner UNITED STATES PATENTS 7/1940 Fieg 85-45 6/ 1951 Stellin 85-45 CARL W. TOMLIN, Primary Examiner.

M. PARSONS, JR., Assistant Examiner.

Claims (1)

1. A SCREW HEAD OF SUBSTANTIAL LENGTH AND UNIFORM DIAMETER HAVING A CROSS-SLOTTED DRIVING RECESS CENTRALLY THEREOF FORMING A PLURALITY OF DIAMETRICALLY OPPOSITE TRIANGULAR SEGMENTS, EACH OF SAID SEGMENTS PRESENTING A SLIGHTLY INCLINED UPSTANTING CORNER EDGE RADIALLY OF AND ADJACENT THE SCREW HEAD AXIS ADAPTED TO BE ENGAGED BY A WINGED TYPE DRIVING TOOL, EACH OF SAID SEGMENTS HAVING A TOP FACE AND A RIDGE EXTENDING RADIALLY OF SAID SCREW HEAD AND BISECTING SAID SEGMENT, SAID TOP FACE BEING INCLINED DOWNWARDLY RADIALLY TOWARD THE SCREW HEAD AXIS AND INCLINED DOWNWARDLY IN OPPOSITE DIRECTIONS FROM SAID RIDGES SO AS TO DEFINE A PAIR OF SLOPING TRIANGULAR SURFACES
US3269250A 1964-07-02 1964-07-02 Universal screw head Expired - Lifetime US3269250A (en)

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Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3411396A (en) * 1966-02-21 1968-11-19 Torrington Co Screw head with inclined driving recess
US4041834A (en) * 1976-08-24 1977-08-16 Illinois Tool Works Inc. Plastic headed fastener assembly
DE3337535A1 (en) * 1983-10-14 1985-05-02 Alfons Knoche Screw having an improved internal drive, a stamping die for pressing the internal drive of such a screw, and a screwdriver for this screw
US4930960A (en) * 1988-05-13 1990-06-05 Slater Electric Inc. Mounting arrangement for electrical wiring devices having non-metallic mounting strap
US5018921A (en) * 1990-08-06 1991-05-28 Pinney Richard C Locking screw for modular framework
US5145302A (en) * 1990-06-05 1992-09-08 Titus Tool Company Limited Screws
EP0537807A1 (en) * 1991-10-16 1993-04-21 Textron Inc. Fastener with multilobular internal recess and tool entry ramps
FR2685407A1 (en) * 1991-12-18 1993-06-25 Villard Gerard Safety screw and tool for fitting/removing this screw
US5358368A (en) * 1993-09-09 1994-10-25 General Signal Corporation Screw with improved head design
US6328517B1 (en) 1999-03-30 2001-12-11 Gregory Steven Mann Combination sidewalk bolt
US20030190216A1 (en) * 2002-04-08 2003-10-09 Pass & Seymour, Inc. Turn-lock assembly screw
US20050047891A1 (en) * 2003-05-30 2005-03-03 Toshimasa Toyooka Screw having non-strip drive recess and driver bit for use with the screw
US20050247169A1 (en) * 2003-11-26 2005-11-10 Faries Durward I Jr Fastening system and method of fastening objects with enhanced security
US20050281634A1 (en) * 2004-06-18 2005-12-22 Patricia Tibbenham Waffle stud for insert molded plastic members
US20060078404A1 (en) * 2004-10-07 2006-04-13 Gary Dilling Spiral drive fastener with engagement ramp
US7581910B2 (en) * 2005-09-16 2009-09-01 Illinois Tool Works Inc. Fastener head
USD735567S1 (en) * 2013-12-24 2015-08-04 Kyo-Ei Industrial Corporation Cap for wheel nut
USD744821S1 (en) * 2015-04-23 2015-12-08 Security Locknut LLC Hex locknut
USD775941S1 (en) * 2015-04-23 2017-01-10 Security Locknut, LLC Square locknut
USD784123S1 (en) * 2014-12-01 2017-04-18 Leatt Corporation Helmet visor screw

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2206085A (en) * 1938-06-30 1940-07-02 United Screw And Bolt Corp Screw
US2556155A (en) * 1946-07-13 1951-06-05 Domnic V Stellin Socket head screw

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2206085A (en) * 1938-06-30 1940-07-02 United Screw And Bolt Corp Screw
US2556155A (en) * 1946-07-13 1951-06-05 Domnic V Stellin Socket head screw

Cited By (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3411396A (en) * 1966-02-21 1968-11-19 Torrington Co Screw head with inclined driving recess
US4041834A (en) * 1976-08-24 1977-08-16 Illinois Tool Works Inc. Plastic headed fastener assembly
DE3337535A1 (en) * 1983-10-14 1985-05-02 Alfons Knoche Screw having an improved internal drive, a stamping die for pressing the internal drive of such a screw, and a screwdriver for this screw
US4930960A (en) * 1988-05-13 1990-06-05 Slater Electric Inc. Mounting arrangement for electrical wiring devices having non-metallic mounting strap
US5145302A (en) * 1990-06-05 1992-09-08 Titus Tool Company Limited Screws
US5018921A (en) * 1990-08-06 1991-05-28 Pinney Richard C Locking screw for modular framework
EP0537807A1 (en) * 1991-10-16 1993-04-21 Textron Inc. Fastener with multilobular internal recess and tool entry ramps
FR2685407A1 (en) * 1991-12-18 1993-06-25 Villard Gerard Safety screw and tool for fitting/removing this screw
US5358368A (en) * 1993-09-09 1994-10-25 General Signal Corporation Screw with improved head design
US6328517B1 (en) 1999-03-30 2001-12-11 Gregory Steven Mann Combination sidewalk bolt
US6481944B2 (en) 1999-03-30 2002-11-19 Gregory Steven Mann Combination sidewalk bolt
US6682283B2 (en) 1999-03-30 2004-01-27 Gregory Steven Mann Sidewalk bolt
US20030190216A1 (en) * 2002-04-08 2003-10-09 Pass & Seymour, Inc. Turn-lock assembly screw
US7077038B2 (en) 2003-05-30 2006-07-18 Nitto Seiko Co., Ltd. Screw having non-strip drive recess and driver bit for use with the screw
US20050047891A1 (en) * 2003-05-30 2005-03-03 Toshimasa Toyooka Screw having non-strip drive recess and driver bit for use with the screw
US20050247169A1 (en) * 2003-11-26 2005-11-10 Faries Durward I Jr Fastening system and method of fastening objects with enhanced security
US20050281634A1 (en) * 2004-06-18 2005-12-22 Patricia Tibbenham Waffle stud for insert molded plastic members
US7156598B2 (en) * 2004-06-18 2007-01-02 Ford Global Technologies, Llc Waffle stud for insert molded plastic members
US20060078404A1 (en) * 2004-10-07 2006-04-13 Gary Dilling Spiral drive fastener with engagement ramp
US7255522B2 (en) * 2004-10-07 2007-08-14 Phillips Screw Company Spiral drive fastener with engagement ramp
US7581910B2 (en) * 2005-09-16 2009-09-01 Illinois Tool Works Inc. Fastener head
USD735567S1 (en) * 2013-12-24 2015-08-04 Kyo-Ei Industrial Corporation Cap for wheel nut
USD784123S1 (en) * 2014-12-01 2017-04-18 Leatt Corporation Helmet visor screw
USD744821S1 (en) * 2015-04-23 2015-12-08 Security Locknut LLC Hex locknut
USD775941S1 (en) * 2015-04-23 2017-01-10 Security Locknut, LLC Square locknut

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