US2474994A - Screw socket - Google Patents

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Publication number
US2474994A
US2474994A US470671A US47067142A US2474994A US 2474994 A US2474994 A US 2474994A US 470671 A US470671 A US 470671A US 47067142 A US47067142 A US 47067142A US 2474994 A US2474994 A US 2474994A
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US
United States
Prior art keywords
screw
recess
driver
walls
grooves
Prior art date
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
Application number
US470671A
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English (en)
Inventor
Joseph J Tomalis
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
AMERICAN SCREW Co
AMERICAN SCREW CO
Original Assignee
AMERICAN SCREW CO
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by AMERICAN SCREW CO filed Critical AMERICAN SCREW CO
Priority to US470671A priority Critical patent/US2474994A/en
Priority to US782875A priority patent/US2507231A/en
Priority to GB33059/47A priority patent/GB663163A/en
Priority to NL137000A priority patent/NL74183C/nl
Priority to BE478339A priority patent/BE478339A/fr
Priority to CH281532D priority patent/CH281532A/fr
Priority to FR958075D priority patent/FR958075A/fr
Application granted granted Critical
Publication of US2474994A publication Critical patent/US2474994A/en
Priority to DEP495A priority patent/DE966464C/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B15/00—Screwdrivers
    • B25B15/001—Screwdrivers characterised by material or shape of the tool bit
    • B25B15/004—Screwdrivers characterised by material or shape of the tool bit characterised by cross-section
    • B25B15/005—Screwdrivers characterised by material or shape of the tool bit characterised by cross-section with cross- or star-shaped cross-section
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B23/00—Specially shaped nuts or heads of bolts or screws for rotations by a tool
    • F16B23/0007—Specially 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
    • F16B23/0023—Specially 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
    • Y—GENERAL 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S411/00—Expanded, threaded, driven, headed, tool-deformed, or locked-threaded fastener
    • Y10S411/919—Screw having driving contacts

Definitions

  • This invention relates to screws and more particularly to screw head recesses and to the particular configuration of the recess walls whereby improved cooperation with a screw-driver is provided for the several purposes of retaining the screw on the driver bit for placement in awkward positions, for providing more effective driving torque, less throw-out pressure and superior results when used with any form of hand or power screw-driver.
  • Another object of the invention consists in the provision of an improved Phillips type recess wherein the walls to which the driving force of the bit is applied are so angled as to cooperate with the driving walls of the screw-driver bit wings to provide driving torque up to that cavented from reaming the screw recess and so destroying the screw.
  • An important feature of the present invention resides in the compound angular disposition of the side walls of the recess grooves whereby the results mentioned above are attained without adding to the (Tiificulties of forming the recesses by a cold heading operation.
  • a further and extremely important feature of the invention consists in the relative dispositions of the several surfaces of the recess in relation to the bit portion of the driver whereby wedging cooperation for the purpose of retaining the screw on the driver is obtained under all conditions of wear on the driving surfaces of the bit blades so that irrespective of the wear conditions of those portions of the blade exerting the driving effort a screw may be securely held on the blade for insertion in places difllcult to reach.
  • Figure 1 illustrates a screw and screw-driver constructed according to the present invention shown united for supporting the former from the latter for insertion by one hand or in difiicult positions;
  • Figure 2 is a plan view on an exaggerated scale of the head of a screw provided with an improved recess constructed in accordance with the present invention and showing what will hereinafter be termed the horizontal wing angle;
  • Figure 3 is a vertical section taken on line 3-3 of Figure 2 or axially of the screw shank and showing the interior arrangement of the recess walls and ribs;
  • Figure 4 is an end view on a somewhat reduced scale of the bit portion of a screw-driver for cooperation with a recess such as shown in Figures 2 and 3;
  • Figure 5 illustrates the screw-driver of the form shown in Figure 4 cooperating with a recess of the type illustrated in Figures 2 and 3 shown in axial section on line 5-5 of Figure 4;
  • Figure 6 is a view similar to Figure 2, but showing the screw-driver bit positioned in the recess and sectioned in the plane of the top of the screw head;
  • Figure 7 is a vertical axial section on line '!-1 of Figure 6 illustrating, with that figure, the clearance between the end walls of the wing portions of the screw-driver bit and the grooves in the head recess;
  • Figure 8 is a section on line 88 of Figures 6 and 7;
  • Figure 9 is a vertical section on line 99 of Figure 3, showing what will hereinafter be termed the vertical" angle of a recess wing or groove;
  • Figures 10, 11 and 12 are diagrams illustrating the angular relationships hereinafter mentioned.
  • the conventional coupling between the head of the screw and the bit of a screw-driver was formed by a simple kerf cut entirely across the screw head and adapted to receive the substantially fiat blade of a screw-driver.
  • the walls of the kerf were parallel to each other in most cases since the cutting was done with a small circular saw, but the engaging walls of the driver blade included an appreciable angle, not only to prevent weakening the blade but for convenience in its construction, for the usual blade was flattened from a circular rod to provide additional width and to reduce the thickness. Sharpening, after wear, should normally follow the original sur faces but the tendency was to increase the included angle to reduce the amount of material necessary to be removed in the sharpening operation.
  • the type of recess which received the most favorable comment and acclaim and which has now become almost standard, particularly for use on assembly 1 lines and with both stationary and portable power drivers is that known as the Phillips. It comprises a recess in plan of general cruciform shape including alternate grooves and intermediate ribs adapted to respectively accommodate wings and channels on a screw-driver bit. Such a recess is shown in Phillips Patent 2,046,839 of July 7, 1936.
  • both the disadvantage of excessive throw-out force and loss of engaging contact between the bit and head recess as a result of wear is eliminated by certain modifications in the recess and in the driver while otherwise improving the Phillips characteristics.
  • Figure 1 shows a more or less conventional hand screw-driver l0 and a wood screw ll held together solely by the cooperating friction between the surface of the Phillips type bit and the walls of the Phillips type recess in the fiat head of the screw.
  • this invention will be described and shown in connection with the standard so-called fiat headed screw although it is obviously equally applicable to all of the other well known types of screw heads and even may be applied to headless screws such as concealed set screws and the like for the shape of the head has no bearing whatsover on the shape or the manner of use of the recess.
  • the recess is shown in detail on an enlarged scale in Figures 2 and 3 and generally bears the reference character l2.
  • This recess is of polygonal form in plan and may best be defined as cruciform, including a center portion and a plurality of radiating channels or grooves l4 and an equal number of ribs and ridges 15 intermediate the channels.
  • the walls of these ribs and ridges which are each preferably four in number define the side outlines of the recess and connect with a generally conical or concave bottom It.
  • the center portion of the recess is open throughout as clearly seen.
  • Each groove or channel is defined by a pair of triangular side walls [8 and a sloping bottom wall l9 which because of its intersection with the surface of the screw head also defines the outer side of the channel.
  • the wall is merges with the concave bottom wall at 20 and extending upward from the ends of this junction are the edges 2
  • the several rib walls 22 between each two grooves meet each other to form a generally EXAMINER convex surface and merge at 23 into the walls of the concave bottom.
  • the walls l8 of the several grooves are the ones which, in driving, engage with the corresponding flanges or wings on the screw-driver bit. which will be later described. These walls provide the surfaces for transmitting the driving or removing forces to the screw.
  • Each of the walls I8 is a plane. This plane is sloped on a compound angle.
  • the intersections of the two planes I8 comprising the side walls of a wing groove with a plane at right angles to the axis of the screw shank, or with the surface of the head of a flatheaded screw, include an angle of between 2 and 4 as indicated in Figure 2 (2 as shown in Fig.
  • the planes l8 also converge toward each other downwardly from the surface of the head as clearly seen in Figures 3 and 11 where the included angle between the intersections of the two planes I8 with an imaginary plane X-X (Fig. 10) extending parallel to the axis of the screw and at right angles to the radial plane of symmetry of the groove is approxmiately 8 to 10 as shown in Figure 11 and varies in accordance with the purpose for which the screw is made. Such intersections are shown dotted in Figure 11.
  • the rib walls 22 flare outwardly from their intersections with the concave bottom of the recess at very moderate angles, the exact slope of which is unimportant for the purposes of the present invention.
  • each groove slopes outwardly and upwardly at an acute angle to the axis of the screw as clearly seen in Figure 3.
  • the recesses are formed during the heading operations on the screws by suitable punches, and sufficient slope is provided to each wall of the recess to permit adequate draft for the punch and to facilitate the flow of metal in the head during the punching operation.
  • the recesses by virtue of this type of manufacture are constructed within precision limits so that they may accurately receive a similarly formed and sized bit on a screw-driver.
  • Such a screw-driver is shown in end plan in Figure 4 and in elevation and partial center section in Figure 5.
  • the shank thereof is preferably cylindrical as shown at and may be equipped with a handle as shown at Si in Figure 1 or with means to be gripped in the chuck of a power driver.
  • the bit portion at the end of the screw-driver is formed complementary to the recess in which it will be received, with certain exceptions which will be hereafter defined.
  • Each size of screw-driver bit is constructed to operate with varying depths of recesses. These vary with the sizes of screws in which they are formed in order to provide adequate bearing surfaces for transmitting the torque necessary to drive the screws.
  • each driver is provided with wings 33 equal in number and spacing to the grooves I 4 in the screw head recess and intermediate these wings are channels 34, portions of which are provided with walls complementary to the rib walls 22 of the recess.
  • the bottom 31 of the screw-driver is formed with a conical point of similar shape to the bottom N5 of the recess.
  • each bit wing 33 which correspond to and cooperate with the groove walls I8 are formed to the exact same angular disposition in both the vertical and horizontal planes.
  • the wall of the wing corresponding to the outer wall I9 of the groove is likewise angled the same as this wall.
  • the walls 35 of the channels in the bit are of the exact same angular disposition as the walls with which they cooperate, i. e., 22 in the recess. It might be considered from the above that the bit end is the exact counterpart of the recess, but this is not quite true.
  • the channel walls may be considered as spaced apart laterally on opposite sides of the bit just sufficient to be the first to engage With the rib walls of the recess when the driver is inserted and their spacing apart is such as to first prevent bottoming of the driver in the recess and, second, to prevent the Wings from being inserted into contact with the walls of the grooves in the recess. Looked at in another light it may be considered that the wings are thinner than the grooves and hence do not engage the walls of the latter when the driver is stopped by having its channel walls engaging the rib walls of the recess. In any event, as illustrated in Figure 6.
  • Axial thrust endeavoring to force a screw driver out of the screw recess as a resultant of the driving torque is usually referred to as throw-out and is present in greater or less degree in most every type of screw recess and driver unless zero vertical angle is used on all engaging riving aces or the friction between the driver and recess walls is greater than the axial component of the driving torque.
  • This throw-out is reduced in the present construction to the lowest factor consistent with good engi neering principles and commercial operation as a result of the small included horizontal and vertical angles between the walls of th recess grooves and bit wings.
  • the improved recess and screw-driver bit are available for all types of screws, even those having the shallowest heads.
  • the area of the wings eliminates the need of great depth of penetration and is so remote from the screw-axis as to materially decrease the unit pressure. This also increases the strength of the screw-head.
  • the changed horizontal angle provides relatively large openings between the recess ribs increasing the ease of insertion of the bit, increases the bit life, locates the center of pressure on the wing farther away from the axis and materially decreases the possibility of burring at the mouth of the recess.
  • a screw having a socket extending into its upper end along its longitudinal axis and comprising a central portion and grooves radiating therefrom, the side walls of said grooves converging toward each other outwardly of the said central portion so that their intersections with a plane normal to said axis define an angle not greater than 4.
  • a screw having a socket extending into its upper end along its longitudinal axis and comprising a central portion and grooves radiating therefrom, the side walls of said grooves converging toward each other outwardly of the said central portion so that their intersections with a plane normal to said axis define an angle not greater than 4 nor less than 2".
  • a screw having a socket extending into its upper end along its longitudinal axis and comprising a central portion and grooves radiating therefrom, the side walls of said grooves converging toward each other outwardly of the said central portion so that their intersections with a plane normal to said axis define an angle not greater than 4, said side walls also converging toward the opposite end of the screw such that their intersections with a plane parallel to the axis and transverse to the groove define an angle not greater than 10.
  • a screw having a socket extending into its upper end along its longitudinal axis and comprising a central portion and grooves radiating therefrom, the side walls of said grooves comprising plane surfaces converging toward each other outwardly of said central portion at an included angle of substantially 8 -10V the intersection of said surfaces with a plane normal to the said axis defining an angle not substantially less than 2 nor substantially greater than 4.
  • a screw having a socket extending into its upper end along its longitudinal axis and comprising a central portion and grooves radiating therefrom, the side walls of said grooves comprising plane surfaces converging toward each other outwardly of said central portion, the line of intersection of said planes intersecting said axis at an angle of substantially the included angle between said plans being such that torque applied by a screw-driver of complemental shape to said recess and of sumcient intensity to drive said screw under normal conditions of resistance does not produce a substantial throw-out force axially of the screw-driver.
  • a screw having a generally inwardly tapering recess extending into its upper end along its longitudinal axis.
  • the walls of said recess comprising alternate ribs and grooves converging toward a concave bottom, each groove having tapered side walls and a tapered bottom wall and being of gradually increasing width from the outer edge thereof toward the axis, the intersection lines of the side walls with a plane normal EXAML' R to the axis including an angle of between 2 and 4, each rib having a plurality of contiguous walls intermediate the grooves and merging at an angle with the edges of the side walls of the adjacent grooves, said rib walls flaring from the concave bottom at an acute angle to said axis.
  • a screw having a generally inwardly tapering recess extending into its upper end along its longitudinal axis, the walls of said recess comprising alternate ribs and grooves converging toward a concave bottom, each groove having tapered side walls and a tapered bottom wall and being of gradually increasing width from the outer edge thereof toward the axis, the intersection lines of the side walls with a plane normal to the axis including an angle of between 2 and 4, the side walls of the grooves also converging from top to bottom with an included angle between the lines of intersection thereof on a vertical plane of substantially 8-10, each rib having a plurality of contiguous walls intermediate the grooves and merging at an angle with the edges of the side walls of the adjacent grooves, said rib walls flaring from the concave bottom at an acute angle to said axis.
  • a screw having a generally inwardly tapering recess extending into its upper end long its- 10 longitudinal axis, the walls of said recess comprising alternate ribs and grooves converging toward a concave bottom, each groove having plane, tapered side walls and a tapered bottom wall, the side walls of each groove converging toward each other outwardly and downwardly so that their intersections with a plane normal to the screw axis defines an angle of 2 to 4 and their intersections with a plane parallel to the axis and transverse to the groove define an angle not greater than 10, each rib having a plurality of contiguous walls intermediate the grooves and merging at an angle with the edges of the side Walls of the adjacent grooves, said walls flaring outwardly from the concave bottom at an acute angle to said axis.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Connection Of Plates (AREA)
  • Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
  • Joining Of Building Structures In Genera (AREA)
US470671A 1942-12-30 1942-12-30 Screw socket Expired - Lifetime US2474994A (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
US470671A US2474994A (en) 1942-12-30 1942-12-30 Screw socket
US782875A US2507231A (en) 1942-12-30 1947-10-29 Screw driver having cruciform shaped bit
GB33059/47A GB663163A (en) 1942-12-30 1947-12-15 Improvements in and relating to screws and screw-drivers
NL137000A NL74183C (nl) 1942-12-30 1947-12-16 Schroef en schroevedraaier
BE478339A BE478339A (fi) 1942-12-30 1947-12-18
CH281532D CH281532A (fr) 1942-12-30 1947-12-24 Vis.
FR958075D FR958075A (fr) 1942-12-30 1947-12-29 Perfectionnements aux vis à tête creuse et outil pour leur mise en place
DEP495A DE966464C (de) 1942-12-30 1949-12-28 Schraube

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US470671A US2474994A (en) 1942-12-30 1942-12-30 Screw socket

Publications (1)

Publication Number Publication Date
US2474994A true US2474994A (en) 1949-07-05

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Application Number Title Priority Date Filing Date
US470671A Expired - Lifetime US2474994A (en) 1942-12-30 1942-12-30 Screw socket

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US (1) US2474994A (fi)
BE (1) BE478339A (fi)
CH (1) CH281532A (fi)
DE (1) DE966464C (fi)
FR (1) FR958075A (fi)
GB (1) GB663163A (fi)
NL (1) NL74183C (fi)

Cited By (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3025896A (en) * 1958-06-26 1962-03-20 Phillips Screw Co Tools for recessed head fastener with oblique recess
US3028781A (en) * 1958-06-26 1962-04-10 Phillips Screw Co Recessed head fastener with oblique recess
US3122963A (en) * 1964-03-03 Recess head screw
US3187790A (en) * 1959-05-18 1965-06-08 Hi Shear Rivet Tool Company Screw and screw driver coupling
US4084478A (en) * 1974-09-12 1978-04-18 Phillips Screw Company Screw heads
DE2929887A1 (de) * 1978-07-26 1980-02-14 Technofast Inc Kreuzloch-schraube
EP0369655A2 (en) * 1988-11-14 1990-05-23 Black & Decker Inc. Improved screwdriver bit for Phillips-head fasteners
US4998454A (en) * 1988-11-14 1991-03-12 Black & Decker Inc. Screwdriver bit for phillips-head fasteners
US5660091A (en) * 1996-02-06 1997-08-26 Walter Lorenz Surgical, Inc. Blunt-nosed, self-retaining screwdriver
WO1999023389A1 (en) 1997-10-31 1999-05-14 Creare Inc. Spiral drive system for threaded fasteners
US6223634B1 (en) 1997-10-03 2001-05-01 Phillips Screw Company Recessed head fastener and driver systems
US6682283B2 (en) * 1999-03-30 2004-01-27 Gregory Steven Mann Sidewalk bolt
US6843729B2 (en) 2002-02-26 2005-01-18 Phillips Screw Company Fastener having recess useable with multiple drivers and method of manufacture
US20060078404A1 (en) * 2004-10-07 2006-04-13 Gary Dilling Spiral drive fastener with engagement ramp
US20090074536A1 (en) * 2004-04-15 2009-03-19 Phillips Screw Company, Inc. Spiral drive fastener with friction engageable surface
US20090260489A1 (en) * 2008-04-21 2009-10-22 Phua Cheng Siong Drive system
US20110182696A1 (en) * 2008-10-10 2011-07-28 Nobuhiro Ogawa Structure of cross-shaped groove of screw for fit with driver bit
EP2363245A2 (en) 2010-03-02 2011-09-07 Phillips Screw Company Fastener system with stable engagement and stick fit
US20150032116A1 (en) * 2013-07-25 2015-01-29 Zimmer Spine, Inc. Self-retaining driver for a bone screw
US9422965B2 (en) 2013-05-10 2016-08-23 Bryce Fastener, Inc. Methods and apparatus for asymmetrical fastening system
USD769690S1 (en) 2013-05-10 2016-10-25 Bryce Fastener Company, Inc. Combination fastener and mating driving tool
WO2020154522A1 (en) * 2019-01-24 2020-07-30 Acument Intellectual Properties, Llc Enhanced stick fit bit design
US10780559B2 (en) 2017-04-25 2020-09-22 William Norton Helical toothed driver and compatible fastener
USD897806S1 (en) 2018-04-30 2020-10-06 William Norton Driver
US10995788B2 (en) 2017-12-15 2021-05-04 Phillips Screw Company Stick fit fastener recess system
US11466720B2 (en) 2017-12-15 2022-10-11 Phillips Screw Company Stick fit fastener recess system
USD980707S1 (en) * 2021-02-15 2023-03-14 Min Woo Lee Bolt

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL276619A (fi) * 1961-03-31

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2046837A (en) * 1934-07-03 1936-07-07 Phillips Screw Co Means for uniting a screw with a driver
US2058197A (en) * 1935-12-12 1936-10-20 Maxwell A West Screw
US2296887A (en) * 1941-10-17 1942-09-29 Champion Inc Screw

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10612C (de) * P. SCHNEITLER in Berlin N., Müllerstrafse 179B Neuerungen an Schraubenköpfen und zugehörigen Schraubenziehern
US2046838A (en) * 1934-07-03 1936-07-07 Phillips Screw Co Screw driver
US2046839A (en) * 1935-01-15 1936-07-07 Phillips Screw Co Screw
US2066484A (en) * 1935-01-15 1937-01-05 Philips Screw Company Screw
US2046840A (en) * 1935-01-15 1936-07-07 Phillips Screw Co Screw driver
US2084079A (en) * 1935-11-15 1937-06-15 American Screw Co Screw
US2084078A (en) * 1935-11-15 1937-06-15 American Screw Co Method of making screws

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2046837A (en) * 1934-07-03 1936-07-07 Phillips Screw Co Means for uniting a screw with a driver
US2058197A (en) * 1935-12-12 1936-10-20 Maxwell A West Screw
US2296887A (en) * 1941-10-17 1942-09-29 Champion Inc Screw

Cited By (51)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3122963A (en) * 1964-03-03 Recess head screw
US3025896A (en) * 1958-06-26 1962-03-20 Phillips Screw Co Tools for recessed head fastener with oblique recess
US3028781A (en) * 1958-06-26 1962-04-10 Phillips Screw Co Recessed head fastener with oblique recess
US3187790A (en) * 1959-05-18 1965-06-08 Hi Shear Rivet Tool Company Screw and screw driver coupling
US4084478A (en) * 1974-09-12 1978-04-18 Phillips Screw Company Screw heads
DE2929887A1 (de) * 1978-07-26 1980-02-14 Technofast Inc Kreuzloch-schraube
US4202244A (en) * 1978-07-26 1980-05-13 Technofast, Inc. Recessed head screw
EP0369655A2 (en) * 1988-11-14 1990-05-23 Black & Decker Inc. Improved screwdriver bit for Phillips-head fasteners
EP0369655A3 (en) * 1988-11-14 1990-07-11 Black & Decker Inc. Improved screwdriver bit for phillips-head fasteners
US4998454A (en) * 1988-11-14 1991-03-12 Black & Decker Inc. Screwdriver bit for phillips-head fasteners
US5660091A (en) * 1996-02-06 1997-08-26 Walter Lorenz Surgical, Inc. Blunt-nosed, self-retaining screwdriver
US20040033838A1 (en) * 1997-10-03 2004-02-19 Phillips Screw Company Punch and manufacturing method for recessed head fastener
US6223634B1 (en) 1997-10-03 2001-05-01 Phillips Screw Company Recessed head fastener and driver systems
US6601482B2 (en) 1997-10-03 2003-08-05 Phillips Screw Company Recessed head fastener and driver systems
US5957645A (en) * 1997-10-31 1999-09-28 Phillips Screw Company Spiral drive system for threaded fasteners
US6234914B1 (en) 1997-10-31 2001-05-22 Phillips Screw Company Punch for forming threaded fasteners with spiral drive
US6367358B1 (en) 1997-10-31 2002-04-09 Phillips Screw Company Driver for threaded fasteners with spiral drive
WO1999023389A1 (en) 1997-10-31 1999-05-14 Creare Inc. Spiral drive system for threaded fasteners
US6682283B2 (en) * 1999-03-30 2004-01-27 Gregory Steven Mann Sidewalk bolt
US6890139B2 (en) 2002-02-26 2005-05-10 Phillips Screw Company Fastener having recess useable with multiple drivers and method of manufacture
US6852037B2 (en) 2002-02-26 2005-02-08 Phillips Screw Company Fastener having recess useable with multiple drivers and method of manufacture
US6843729B2 (en) 2002-02-26 2005-01-18 Phillips Screw Company Fastener having recess useable with multiple drivers and method of manufacture
US20060065084A1 (en) * 2002-02-26 2006-03-30 Hughes Barry J Fastener having recess useable with multiple drivers and method of manufacture
CN101427037B (zh) * 2004-04-15 2013-11-06 菲利普斯螺丝公司 具有摩擦接合面的螺旋驱动紧固件
US20090074536A1 (en) * 2004-04-15 2009-03-19 Phillips Screw Company, Inc. Spiral drive fastener with friction engageable surface
US7618327B2 (en) 2004-04-15 2009-11-17 Philips Screw Company, Inc. Fastener with friction engageable surface
CN101427037A (zh) * 2004-04-15 2009-05-06 菲利普斯螺丝公司 具有摩擦接合面的螺旋驱动紧固件
US7255522B2 (en) 2004-10-07 2007-08-14 Phillips Screw Company Spiral drive fastener with engagement ramp
US20060078404A1 (en) * 2004-10-07 2006-04-13 Gary Dilling Spiral drive fastener with engagement ramp
US20070214920A1 (en) * 2004-10-07 2007-09-20 Gary Dilling Spiral drive fastener with engagement ramp
US7404769B2 (en) 2004-10-07 2008-07-29 Phillips Screw Company Spiral drive fastener with engagement ramp
US20090260489A1 (en) * 2008-04-21 2009-10-22 Phua Cheng Siong Drive system
US8182187B2 (en) 2008-04-21 2012-05-22 Asia Fastening (Us), Inc. Drive system
US20110182696A1 (en) * 2008-10-10 2011-07-28 Nobuhiro Ogawa Structure of cross-shaped groove of screw for fit with driver bit
US8757950B2 (en) * 2008-10-10 2014-06-24 Crown Screw Corporation Structure of cross-shaped groove of screw for fit with driver bit
US20110217143A1 (en) * 2010-03-02 2011-09-08 Hughes Barry J Fastener system with stable engagement and stick fit
US8616097B2 (en) 2010-03-02 2013-12-31 Phillips Screw Company Fastener systems and methods of forming fastener systems with stable engagement and stick fit
EP2363245A2 (en) 2010-03-02 2011-09-07 Phillips Screw Company Fastener system with stable engagement and stick fit
US8291795B2 (en) 2010-03-02 2012-10-23 Phillips Screw Company Fastener system with stable engagement and stick fit
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USD769690S1 (en) 2013-05-10 2016-10-25 Bryce Fastener Company, Inc. Combination fastener and mating driving tool
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US10926384B2 (en) 2017-04-25 2021-02-23 William Norton Fastener compatible with helical toothed driver
US10995788B2 (en) 2017-12-15 2021-05-04 Phillips Screw Company Stick fit fastener recess system
US11466720B2 (en) 2017-12-15 2022-10-11 Phillips Screw Company Stick fit fastener recess system
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Also Published As

Publication number Publication date
BE478339A (fi) 1948-01-31
NL74183C (nl) 1954-03-15
DE966464C (de) 1957-08-08
FR958075A (fr) 1950-03-03
GB663163A (en) 1951-12-19
CH281532A (fr) 1952-03-15

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