US3859888A - Oval screw - Google Patents

Oval screw Download PDF

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Publication number
US3859888A
US3859888A US274211A US27421172A US3859888A US 3859888 A US3859888 A US 3859888A US 274211 A US274211 A US 274211A US 27421172 A US27421172 A US 27421172A US 3859888 A US3859888 A US 3859888A
Authority
US
United States
Prior art keywords
screw
oval
top surface
cut
cone
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
US274211A
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English (en)
Inventor
Jujiro Okada
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Application granted granted Critical
Publication of US3859888A publication Critical patent/US3859888A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • 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

  • the present invention pertains to a screw with a head shaped in a top-cut oval cone which spreads'out downwardly and which has a round top surface and also has an oval circumference with a slightly longer diameter than that of said circle.
  • the top surface is planed into a circle and the longer diameter part of the original oval top surface is made into a slow arc slope toward the upper edge of the top-cut oval cone which is planed off.
  • the object of the present invention is to provide, in combination with a driver, a new and improved head construction which overcomes the objections inherent in the wood and machine screws heretofore used and possesses the following outstanding advantages, namely, presents a neater and more ornamental appear'ance than the slotted and hexagonal heads heretofore used, can be fit in a socket-type screw driver smoothly and securely, and can be driven at higher speed and tightened to the desired degree with far less efforts and attention than ordinary screws and without any danger of the head becoming disfigured or the adjacent surfaces marred, and can be manufactured by high speed production methods at lower costs than ordinary screws.
  • FIG. 1 is a plan view of the oval screw according to the present invention.
  • FIG. 2 is a corresponding elevation.
  • FIG. 3 is a side view and FIG. 4 is a front view to show the state that the socket-type screw driver is put on the screw head.
  • FIGS. v1-3 -reference numeral 1 denotes a screw body and the numeral 2 a screw head.
  • the screw head 2 is made into a top-cut oval cone which is narrowed upward. Its top surface 3 is made into a circle with edge having been planed off.
  • the diameter of said circle corresponds to the shorter diameter of the top surface 3 of said top-cut oval cone, whereby the longer diameter part of the original oval top surface protrudes slightly from the circumference of the circle.
  • Such protruded part is made into a slow arc slope 4 toward the upper edge of the top-cut oval cone.
  • the screw can be easily screwed in by putting a socket-type screw driver 5, which fits the slope of the top-cut oval cone, onto the screw head 2 as seen in FIG. 4 and by turning said screw driver.
  • the slope of the top-cut oval cone offers resistance to the inner surface of the socket of the screw driver 5 thus driving the screw.
  • the side of the screw head 2 is of the shape of a topcut oval cone which is narrowed upward, and yet the upper edge of the screw head 2 is planed off into an arc slope shape, due to which the screw driver 5 can be easily put on the screw head 2 and can be guided by said slope so as to engage with the screw head 2 smoothly and securely.
  • the socket of the screw driver 5 is shaped in such a way as it has gaps 7'and 8 respec- I tively between the top surface 3 of the screw head 2 and the inner surface of the socket and between the edge of the socket and the object 6 to be screwed.
  • the angle a of the slope of the screw head 2 is about 6 from a perpendicular line at the lower edge of the screw head 2.
  • the top surface 3 of the screw head 2 is shaped into a circle with planed edge and yet the circle is succeeded by the slope at the larger diameter part of the top-cut oval cone via the slow arc slope 4, whereby the screw head 2 as a whole'gives the illusion as if it were a complete circle. Therefore, the screw head after having been applied to the object to be screwed gives a very good appearance as if it were the round head of a rivet. 7
  • top surface 3 of the screw head 2 is round as described above and the edge of the circle to be succeeded by the larger diameter part of the top-cut oval cone is shaped into the slow arc slope 4 and yet is planed off more than that to be succeeded by the shorter diameter part.
  • the present invention has such advantage as it is possible to produce a screw being very simple in structure and yet excellent in both appearance and function.
  • a screw threaded fastening element comprising:
  • a tool engaging head having coaxially arranged upper and lowersurfaces and an inclined side portion connecting said upper and lower surfaces and adapted to engage a tool, said upper surface being smaller than said lower surface, said lower surface being fiat and connected to said threaded shank portion at an end of said shank portion, said upper surface having a circular cross section, said lower surface having an elliptical cross section having a majoraxis and a minor axis, said inclined side portion tapering upwardly from said elliptical lower surface to said circular upper surface and having a .3 v 4 varying radius of curvature, said radius of curvacal lower surface. ture being a minimum value at the intersection of 2.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Surgical Instruments (AREA)
  • Jigs For Machine Tools (AREA)
  • Laminated Bodies (AREA)
  • Dry Formation Of Fiberboard And The Like (AREA)
  • Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
US274211A 1972-02-28 1972-07-24 Oval screw Expired - Lifetime US3859888A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP47019703A JPS4887247A (ja) 1972-02-28 1972-02-28

Publications (1)

Publication Number Publication Date
US3859888A true US3859888A (en) 1975-01-14

Family

ID=12006618

Family Applications (1)

Application Number Title Priority Date Filing Date
US274211A Expired - Lifetime US3859888A (en) 1972-02-28 1972-07-24 Oval screw

Country Status (15)

Country Link
US (1) US3859888A (ja)
JP (1) JPS4887247A (ja)
AU (1) AU475880B2 (ja)
BE (1) BE795984A (ja)
BR (1) BR7206245D0 (ja)
CH (1) CH561863A5 (ja)
DE (1) DE2241293C3 (ja)
DK (1) DK138912B (ja)
FR (1) FR2174590A5 (ja)
GB (1) GB1327719A (ja)
IT (1) IT962202B (ja)
NL (1) NL7302545A (ja)
NO (1) NO131518C (ja)
SE (1) SE395754B (ja)
ZA (1) ZA731002B (ja)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4093285A (en) * 1976-03-18 1978-06-06 Fayle Paul R Window lock
USD270229S (en) 1980-10-22 1983-08-23 The Eastern Company Tool and operator head for tool-operated lock
USD270424S (en) 1980-10-22 1983-09-06 The Eastern Company Tool operator for tool-operated locks
US4693655A (en) * 1985-08-20 1987-09-15 Shigeru Omori Anti-theft device for vehicle wheels (geared oval nut)
WO1998050706A1 (de) * 1997-05-02 1998-11-12 Sfs Industrie Holding Ag Schraube
EP1206648A1 (en) * 1999-07-12 2002-05-22 Goodcart Pty Ltd. Security screw
NL1021737C2 (nl) * 2002-10-24 2004-04-27 Alcoa Nederland Bv Vastzetinrichting alsmede bedieningsgereedschap daarvoor.

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT388215B (de) * 1985-07-11 1989-05-26 Sfs Stadler Ag Befestiger und antriebswerkzeug dafuer
AU752416B2 (en) * 1999-07-12 2002-09-19 Goodcart Pty Limited Security screw
DE20303978U1 (de) 2003-03-13 2003-05-15 Anton Hummel Verwaltungs Gmbh, 79183 Waldkirch Schraubelement mit wenigstens einem Betätigungsteil
DE102010000083A1 (de) * 2010-01-14 2011-07-28 Ludwig Hettich & Co., 78713 Verfahren und Walzbacken zur Herstellung einer Schraube

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1684096A (en) * 1927-12-27 1928-09-11 James W Hughes Cap nut
US3134291A (en) * 1961-10-09 1964-05-26 South Chester Corp Non-removable screw
US3212392A (en) * 1962-06-22 1965-10-19 Nat Lock Co Cup head screw
US3369441A (en) * 1966-05-04 1968-02-20 Anchor Engineering Co Fastener with tapered tool engaging surfaces
US3730048A (en) * 1970-06-11 1973-05-01 J Okada Screw with a head looking like a true circle

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1255801A (fr) * 1960-04-30 1961-03-10 Gewerk Eisenhuette Westfalia Dispositif de fixation des plaques d'usure interchangeables pour transporteurs utilisés notamment dans les exploitations minières
GB1188163A (en) * 1967-04-19 1970-04-15 Jujiro Okada An Elliptically-Headed Screw

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1684096A (en) * 1927-12-27 1928-09-11 James W Hughes Cap nut
US3134291A (en) * 1961-10-09 1964-05-26 South Chester Corp Non-removable screw
US3212392A (en) * 1962-06-22 1965-10-19 Nat Lock Co Cup head screw
US3369441A (en) * 1966-05-04 1968-02-20 Anchor Engineering Co Fastener with tapered tool engaging surfaces
US3730048A (en) * 1970-06-11 1973-05-01 J Okada Screw with a head looking like a true circle

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4093285A (en) * 1976-03-18 1978-06-06 Fayle Paul R Window lock
USD270229S (en) 1980-10-22 1983-08-23 The Eastern Company Tool and operator head for tool-operated lock
USD270424S (en) 1980-10-22 1983-09-06 The Eastern Company Tool operator for tool-operated locks
US4693655A (en) * 1985-08-20 1987-09-15 Shigeru Omori Anti-theft device for vehicle wheels (geared oval nut)
WO1998050706A1 (de) * 1997-05-02 1998-11-12 Sfs Industrie Holding Ag Schraube
US6164887A (en) * 1997-05-02 2000-12-26 Sfs Industrie Holding Ag Screw for joining thin workpieces
AU729399B2 (en) * 1997-05-02 2001-02-01 Sfs Industrie Holding Ag Screw
CN1088503C (zh) * 1997-05-02 2002-07-31 Sfs工业控股公司 螺钉
EP1206648A1 (en) * 1999-07-12 2002-05-22 Goodcart Pty Ltd. Security screw
EP1206648A4 (en) * 1999-07-12 2005-07-20 Goodcart Pty Ltd SAFETY SCREW
NL1021737C2 (nl) * 2002-10-24 2004-04-27 Alcoa Nederland Bv Vastzetinrichting alsmede bedieningsgereedschap daarvoor.

Also Published As

Publication number Publication date
DE2241293C3 (de) 1978-12-14
DE2241293A1 (de) 1973-09-06
ZA731002B (en) 1973-11-28
GB1327719A (en) 1973-08-22
NO131518C (ja) 1975-06-11
NO131518B (ja) 1975-03-03
FR2174590A5 (ja) 1973-10-12
CH561863A5 (ja) 1975-05-15
SE395754B (sv) 1977-08-22
IT962202B (it) 1973-12-20
NL7302545A (ja) 1973-08-30
DE2241293B2 (de) 1977-02-10
JPS4887247A (ja) 1973-11-16
DK138912C (ja) 1979-04-23
BR7206245D0 (pt) 1973-12-13
BE795984A (fr) 1973-06-18
AU5215073A (en) 1974-08-15
DK138912B (da) 1978-11-13
AU475880B2 (en) 1976-09-09

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