US1506500A - Safety screw - Google Patents

Safety screw Download PDF

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Publication number
US1506500A
US1506500A US398600A US39860020A US1506500A US 1506500 A US1506500 A US 1506500A US 398600 A US398600 A US 398600A US 39860020 A US39860020 A US 39860020A US 1506500 A US1506500 A US 1506500A
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US
United States
Prior art keywords
screw
head
safety screw
safety
segments
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
US398600A
Inventor
Ripamonti Ettore
Peirano Enrico
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Individual
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Individual
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Priority to US398600A priority Critical patent/US1506500A/en
Application granted granted Critical
Publication of US1506500A publication Critical patent/US1506500A/en
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Expired - Lifetime legal-status Critical Current

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    • 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
    • F16B23/0076—Specially shaped nuts or heads of bolts or screws for rotations by a tool causing slipping of the tool in loosening rotation, i.e. disabling unscrewing unless another tool is used
    • 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
    • Y10S411/91—Antitamper means
    • 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 relates to a safety- Fig. 1 shows an elevation view of a screw with milled 'head; 2 is a plan view-of the same.
  • the screw is formed by the, threaded shank 1- and the milled head 2-. According to the present invention, the screw is formed by the, threaded shank 1- and the milled head 2-. According to the present invention, the screw is formed by the, threaded shank 1- and the milled head 2-. According to the present invention, the screw is formed by the, threaded shank 1- and the milled head 2-. According to the present invention, the screw is formed by the, threaded shank 1- and the milled head 2-. According to the present invention, the
  • head of the screw is provided with a fiat surface 2 extendin diametrically across the same and having its central portion enlar ed to form a circular area 2".
  • Semi-annu ar segments 5 and 6 are arranged on oppositei sides of said flat surface and form part of the head. These semi-annular segments have their centers coaxial .with the axis of the screw, andeach of said segments has a substantially vertical end wall 3, 4 extending tures.
  • each segment is inclined gradually downwardly from its own end wall to the flat surface 2
  • a screw driver or the like 7 placed 40 against the walls 3 and 4 may be used to turn the screw in a clockwise direction, but if an attempt is made to unscrew the screw by means of the tool 7, the screw driver will ride upwardly on the segments 5 and 6.
  • a screw having a head circular in crosssection and provided with a flat upper surface extending diametrically entirely across the head and having its intermediate portion enlarged to form a circular area, a plurality of semi-annular se ments arranged on opposite sides of said at surface, forming part of the head and having their centers coaxial with the axis of the screw, each of said segments having a substantially vertical end wall extending radially from the axis of the screw, the upper face of each segment being inclined graduallydownwardly from its own end wall to said flatsurface.

Description

E. RIPAMONTI ET-AL SAFETY SCREW Filed July 23. 1920 22/2) ezzfb'o g man'lt Z Peal-@12 'Pmma Aug. 26, 1924.
PATENT OFFICE.
ETTOBE RIPAMONTI AND ENIBIIC O PEIRANO', F MILAN, ITALY.
SAFETY SCREW.
Application filed July 23, 1920. Serial no. 398,600.
To all whom it may conce'm:
Be it known that we, Er'ronn RIPAMONTI and Emnco PEIRANO, subjects of the King of Italy, and residents of Milan, Italy, have invented certain new and useful Improvements in Safety Screws, of which the following is a specification.
The present invention relates to a safety- Fig. 1 shows an elevation view of a screw with milled 'head; 2 is a plan view-of the same.
L' e numbers of reference indicate similar parts on the two figures.
The screw is formed by the, threaded shank 1- and the milled head 2-. According to the present invention, the
head of the screw is provided with a fiat surface 2 extendin diametrically across the same and having its central portion enlar ed to form a circular area 2". Semi-annu ar segments 5 and 6 are arranged on oppositei sides of said flat surface and form part of the head. These semi-annular segments have their centers coaxial .with the axis of the screw, andeach of said segments has a substantially vertical end wall 3, 4 extending tures.
radially from the axis of the screw. The upper face of each segment is inclined gradually downwardly from its own end wall to the flat surface 2 With this construction,-a screw driver or the like 7 placed 40 against the walls 3 and 4 may be used to turn the screw in a clockwise direction, but if an attempt is made to unscrew the screw by means of the tool 7, the screw driver will ride upwardly on the segments 5 and 6.
It is understood that. the invention also may be applied to the turned leading screws.
Having now particularly described and ascertained the nature of our invention and in what manner the same is performed, we declare that what we claim is:
A screw having a head circular in crosssection and provided with a flat upper surface extending diametrically entirely across the head and having its intermediate portion enlarged to form a circular area, a plurality of semi-annular se ments arranged on opposite sides of said at surface, forming part of the head and having their centers coaxial with the axis of the screw, each of said segments having a substantially vertical end wall extending radially from the axis of the screw, the upper face of each segment being inclined graduallydownwardly from its own end wall to said flatsurface.
In witness whereofwe aflix our signa- ETTORE RIPAMONTI. ENRICO PEIRANO.
the upper surfaces of 45'
US398600A 1920-07-23 1920-07-23 Safety screw Expired - Lifetime US1506500A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US398600A US1506500A (en) 1920-07-23 1920-07-23 Safety screw

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US398600A US1506500A (en) 1920-07-23 1920-07-23 Safety screw

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US1506500A true US1506500A (en) 1924-08-26

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US398600A Expired - Lifetime US1506500A (en) 1920-07-23 1920-07-23 Safety screw

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Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2558379A (en) * 1946-08-01 1951-06-26 Res Eng & Mfg Self-locking fastener
US3126219A (en) * 1964-03-24 engesser etal
US3176487A (en) * 1963-01-15 1965-04-06 Nat Lock Co Externally mounted lock
US3285119A (en) * 1964-05-05 1966-11-15 Hi Shear Corp Torque-limiting fastener
EP0013274A1 (en) * 1978-12-22 1980-07-09 Fa Karcher Schraubenwerke GmbH Mechanical connectors and fixing tool therefor
EP0539113A1 (en) * 1991-10-22 1993-04-28 P.S.M. International Plc Improvements relating to screw threaded fasteners
US5340256A (en) * 1992-08-14 1994-08-23 Kinnings Marlow Limited Security nuts
US5647712A (en) * 1996-05-09 1997-07-15 Fleetguard, Inc. One directional socket-driven component
DE19955438A1 (en) * 1999-11-18 2001-06-13 Klappstein Kurt Safety screw head has stop faces for transmission of screw-in forces, and opposite faces run at angle abutment-free
US8690504B2 (en) 2011-12-08 2014-04-08 Phoenix Contact Development and Manufacturing, Inc. Torque-limited and removable fastener for one-time use
USD741158S1 (en) * 2014-02-12 2015-10-20 Lock'n Bolt Corporation Lock bolt
US20190048915A1 (en) * 2017-08-08 2019-02-14 B&R Industrial Automation GmbH Mounting element having pressure limitation
USD889407S1 (en) * 2017-05-18 2020-07-07 Gs Yuasa International Ltd. Lead acid battery
USD890097S1 (en) * 2017-05-18 2020-07-14 Gs Yuasa International Ltd. Vent plug for lead acid battery
WO2023035847A1 (en) * 2021-09-07 2023-03-16 浙江盾安人工环境股份有限公司 Anti-disassembly connector

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3126219A (en) * 1964-03-24 engesser etal
US2558379A (en) * 1946-08-01 1951-06-26 Res Eng & Mfg Self-locking fastener
US3176487A (en) * 1963-01-15 1965-04-06 Nat Lock Co Externally mounted lock
US3285119A (en) * 1964-05-05 1966-11-15 Hi Shear Corp Torque-limiting fastener
EP0013274A1 (en) * 1978-12-22 1980-07-09 Fa Karcher Schraubenwerke GmbH Mechanical connectors and fixing tool therefor
EP0539113A1 (en) * 1991-10-22 1993-04-28 P.S.M. International Plc Improvements relating to screw threaded fasteners
US5340256A (en) * 1992-08-14 1994-08-23 Kinnings Marlow Limited Security nuts
US5647712A (en) * 1996-05-09 1997-07-15 Fleetguard, Inc. One directional socket-driven component
DE19955438A1 (en) * 1999-11-18 2001-06-13 Klappstein Kurt Safety screw head has stop faces for transmission of screw-in forces, and opposite faces run at angle abutment-free
US8690504B2 (en) 2011-12-08 2014-04-08 Phoenix Contact Development and Manufacturing, Inc. Torque-limited and removable fastener for one-time use
USD741158S1 (en) * 2014-02-12 2015-10-20 Lock'n Bolt Corporation Lock bolt
USD889407S1 (en) * 2017-05-18 2020-07-07 Gs Yuasa International Ltd. Lead acid battery
USD890097S1 (en) * 2017-05-18 2020-07-14 Gs Yuasa International Ltd. Vent plug for lead acid battery
US20190048915A1 (en) * 2017-08-08 2019-02-14 B&R Industrial Automation GmbH Mounting element having pressure limitation
US11499576B2 (en) * 2017-08-08 2022-11-15 B&R Industrial Automation GmbH Mounting element having pressure limitation
WO2023035847A1 (en) * 2021-09-07 2023-03-16 浙江盾安人工环境股份有限公司 Anti-disassembly connector

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