GB1294765A - Recessed screw - Google Patents
Recessed screwInfo
- Publication number
- GB1294765A GB1294765A GB29877/70A GB2987770A GB1294765A GB 1294765 A GB1294765 A GB 1294765A GB 29877/70 A GB29877/70 A GB 29877/70A GB 2987770 A GB2987770 A GB 2987770A GB 1294765 A GB1294765 A GB 1294765A
- Authority
- GB
- United Kingdom
- Prior art keywords
- recess
- corners
- screw
- square
- degrees
- 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
Links
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
- 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
- F16B23/003—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 star-shaped or multi-lobular, e.g. Torx-type, twelve-point star
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Food-Manufacturing Devices (AREA)
- Forging (AREA)
- Connection Of Plates (AREA)
Abstract
1294765 Heading P L ROBERTSON MFG CO Ltd 19 June 1970 [23 June 1969] 29877/70 Heading B3H [Also in Division F2] A screw has a recess which is centered on and symmetrical with the longitudinal axis of the screw and which in plan view presents eight symmetrically disposed corners at 45 degrees to each other with any four alternate corners lying on the corners of a square, the other four corners lying on the corners of another square disposed at 45 degrees to the first square. A square cross-section driving tool is adapted to engage the corresponding corners of the recess in order to turn the screw. The side walls 2, 3 of the recess are inclined inwardly towards the bottom of the recess at an angle of 3-3À5 degrees relative to the screw axis, and the bottom of the recess may be conical having an angle of 50-56 degrees relative to a perpendicular to the screw axis. The upper edges of the wall portions may be chamfered. The recess may be formed in flat head screws using the punch 15 shown in Fig. 1, or in round headed screws by using a punch (20) (Fig. 4, not shown) shaped to engage the round head.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US83551869A | 1969-06-23 | 1969-06-23 | |
CA55523 | 1969-06-27 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1294765A true GB1294765A (en) | 1972-11-01 |
Family
ID=25666106
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB29877/70A Expired GB1294765A (en) | 1969-06-23 | 1970-06-19 | Recessed screw |
Country Status (6)
Country | Link |
---|---|
US (1) | US3604305A (en) |
BE (1) | BE752228A (en) |
CA (1) | CA898016A (en) |
DE (1) | DE2031024A1 (en) |
FR (1) | FR2052847A5 (en) |
GB (1) | GB1294765A (en) |
Families Citing this family (21)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4151621A (en) * | 1974-09-12 | 1979-05-01 | Phillips Screw Company | Tools for punching fastener heads |
JPS55132409A (en) * | 1979-04-03 | 1980-10-15 | Miyagawa Kinzoku Kogyo | Screw and its forming jig |
DE3337535A1 (en) * | 1983-10-14 | 1985-05-02 | Alfons 5758 Fröndenberg 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 |
IT8452845V0 (en) * | 1984-01-17 | 1984-01-17 | Fossati Onorina | SCREW SUITABLE FOR PRECISION TIGHTENING TORQUES |
US4712586A (en) * | 1985-05-10 | 1987-12-15 | Mcgard, Inc. | Pipe plug and centering construction for centering ridged key in mating groove in pipe plug |
JPH0781575B2 (en) * | 1990-11-26 | 1995-08-30 | 有限会社新城製作所 | Recessed screw and its driver bit |
US5366330A (en) * | 1993-07-26 | 1994-11-22 | Vsi Corporation | Fastener head with internal recess having a radial slot configuration and installation tool therefor |
IT1269314B (en) * | 1994-04-14 | 1997-03-26 | Carlo Sala | SCREW AND RELATIVE SCREWING TOOL |
US6199455B1 (en) | 1999-03-08 | 2001-03-13 | Jjct Enterprises, Inc. | Driver, fastener and forming tool |
US6848907B2 (en) * | 2002-06-24 | 2005-02-01 | Osstem Implant Co., Ltd. | Screw for dental implants |
US20040177729A1 (en) * | 2003-03-10 | 2004-09-16 | Jory Bell | Screw and screw driver |
US20060110237A1 (en) * | 2004-11-23 | 2006-05-25 | Richard Belinda | Spline drive fastener system |
CN103185055A (en) * | 2011-12-29 | 2013-07-03 | 鸿富锦精密工业(深圳)有限公司 | Fastener, drive piece matched with fastener and punch for molding fastener |
GB201222688D0 (en) | 2012-12-17 | 2013-01-30 | Depuy Ireland | A twist-drivable pin assembly |
DE102013105810A1 (en) * | 2013-06-05 | 2014-12-11 | Ejot Gmbh & Co. Kg | Screw with a screw head having a drive |
CN103599985B (en) * | 2013-11-14 | 2015-09-30 | 桂林福达全州高强度螺栓有限公司 | The device of bar chamfering punching in bolt process |
CN104384306B (en) * | 2014-11-25 | 2017-08-04 | 河南航天精工制造有限公司 | A kind of recoil side mould |
US9815324B2 (en) * | 2015-06-12 | 2017-11-14 | Hyundai Motor Company | Antitheft nut |
USD812460S1 (en) * | 2016-08-19 | 2018-03-13 | Katsuyuki Totsu | Screw |
US11572914B2 (en) * | 2020-02-27 | 2023-02-07 | Essence Method Refine Co., Ltd. | Screw having a head with different sockets |
CN114396422A (en) * | 2022-01-28 | 2022-04-26 | 航天精工股份有限公司 | Reinforced dodecagonal-head bolt and machining method |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH250449A (en) * | 1945-09-18 | 1947-08-31 | Schiatti Emilio | A threaded connector. |
US2914984A (en) * | 1956-09-20 | 1959-12-01 | Robertson Mfg Co | Screw socket of pyramidal cross section terminating in a conical bottom wall |
-
1969
- 1969-06-23 US US835518A patent/US3604305A/en not_active Expired - Lifetime
- 1969-06-27 CA CA898016A patent/CA898016A/en not_active Expired
-
1970
- 1970-06-19 GB GB29877/70A patent/GB1294765A/en not_active Expired
- 1970-06-19 FR FR7022852A patent/FR2052847A5/fr not_active Expired
- 1970-06-19 BE BE752228D patent/BE752228A/en unknown
- 1970-06-23 DE DE19702031024 patent/DE2031024A1/en active Pending
Also Published As
Publication number | Publication date |
---|---|
CA898016A (en) | 1972-04-18 |
BE752228A (en) | 1970-12-21 |
FR2052847A5 (en) | 1971-04-09 |
US3604305A (en) | 1971-09-14 |
DE2031024A1 (en) | 1971-01-21 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed [section 19, patents act 1949] | ||
PCNP | Patent ceased through non-payment of renewal fee |