US1151861A - Countersinking screw-head. - Google Patents
Countersinking screw-head. Download PDFInfo
- Publication number
- US1151861A US1151861A US84057914A US1914840579A US1151861A US 1151861 A US1151861 A US 1151861A US 84057914 A US84057914 A US 84057914A US 1914840579 A US1914840579 A US 1914840579A US 1151861 A US1151861 A US 1151861A
- Authority
- US
- United States
- Prior art keywords
- head
- screw
- flutes
- wood
- countersinking
- 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
Links
- 239000002023 wood Substances 0.000 description 10
- 230000000694 effects Effects 0.000 description 6
- 210000001364 upper extremity Anatomy 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 210000003141 lower extremity Anatomy 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 240000007594 Oryza sativa Species 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000003467 diminishing effect Effects 0.000 description 1
- 210000003414 extremity Anatomy 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Images
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
- F16B35/00—Screw-bolts; Stay-bolts; Screw-threaded studs; Screws; Set screws
- F16B35/04—Screw-bolts; Stay-bolts; Screw-threaded studs; Screws; Set screws with specially-shaped head or shaft in order to fix the bolt on or in an object
- F16B35/06—Specially-shaped heads
- F16B35/065—Specially-shaped heads with self-countersink-cutting means
-
- 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
- F16B35/00—Screw-bolts; Stay-bolts; Screw-threaded studs; Screws; Set screws
- F16B35/04—Screw-bolts; Stay-bolts; Screw-threaded studs; Screws; Set screws with specially-shaped head or shaft in order to fix the bolt on or in an object
- F16B35/06—Specially-shaped heads
Definitions
- This invention relates to improvements in screw heads and more particularly to that class which are known as self countersin'kh object of the present invention is to provide a screw head which in addition to being self countersinking, will exert a continuously increasing tightening action as the screw head is driven in the wood.
- a further object is to provide a screw head with a plurality or multiplicity of flutes so arranged and shaped that the head will exert a continually increasing tightening effect as the head is cutting its way into the wood to a countersunk position.
- the flutes terminate below the upper plane of the head so as to form a continuous unfluted rim portion, preventing the chips and cut material from escaping from the flutes after the head has reached its countersunk position, thus exerting a maximum tightening effect.
- Figure 1 is a View in elevation of a screw l head formed along the lines of my invention.
- Fig. 2 is a cross sectional view taken on the line 2 2, looking in the direction of the arrow.
- Figs. 3, 4 and 5 are sectional views taken on the lines 3 3, 4 4 and 5 5 respectively, of Fig.-l.v y
- screw includes the usual shank 6', of which a portion only has been depicted and above which extends the beveled head 7.
- the slot 8 extends transversely of the head and the screw as thus far described is of the conventional construction.
- the conical surface 9 of the screw head is provided with a multiplicity of flutes l0.
- Each flute 10 is in transverse section as illustrated in Figs. 2, 3 and 4, substantially V- shape with the one surface l1 extending substantially radial and with the adjoining surface l2 disposed at an angle thereto, thus defining the cutting edge 13.
- the flutes gradually taper in depth, diminishing toward their upper extremity and gradually merge into the conical surface at a point below the top surface of the screw head.
- an unbroken conical surface or rim 14 is defined above the upper extremities of the flutes, as apparent from Figs. l and 2.
- the flutes gradually deepen toward their lower extremities and project a slight distance below the cylindrical surface of the shank 6.
- the curvature of the flutes is of helical characteristics, winding or twisting about the head in a direction opposite to that of rotation during the insertion of the screw.
- the rim 14 the continuity of whose surface has been preserved, exerts the proper wedging action upon the wood to thus insure a firm purchase thereon and the requisite tightening effect of the screw.
- the gradual decrease in the depth of the flutes provides for different degrees of tightening or holding effect at intermediate points in the countersinking action of the head.
- the depth to which the head is countersunk may be taken as an indication of the tightening action or effect exerted by the screw.
- Particular attention is called to the fact that the flutes intersect at their lower extremities to form a plurality of knife-'like e'dges 15 Which are slightly curved as illustrated in Fig. 1,providing for an efiicacious and rapid cutting action at this zone.
- a frusto-conical head for Wood screws comprising a beveled surface provided With a multiplicity of flutes intersecting throughout their extremities adjacent the apex of the head and diverging at their other eX- tremities to define a multiplicity of in- Wardly curved thin cutting blades With relatively Wide clearing spaces, the amount of unbroken surface of the head increasing toward the top thereof and finishing at an unbroken rim.
Description
ERNEST M. BEUMEACK, 0E SILVER CITY, NEW MExIco.
COUNTERSINKING- SCREW-HEAD.
Specification of Letters Patent.
Parenteel aug. si, reis.
Application filed 'May 23,1914. Serial No. 840,579.
T0 all whom t may concern Be it known that l, ERNEST M. BRUM- BACK, a citizen of the United States, residing at Silver City, in the county of Grant and State of New Mexico, have invented a new and useful Countersinking Screw-Head, of which the following is a specification.
This invention relates to improvements in screw heads and more particularly to that class which are known as self countersin'kh object of the present invention is to provide a screw head which in addition to being self countersinking, will exert a continuously increasing tightening action as the screw head is driven in the wood. i
A further object is to provide a screw head with a plurality or multiplicity of flutes so arranged and shaped that the head will exert a continually increasing tightening effect as the head is cutting its way into the wood to a countersunk position. The flutes terminate below the upper plane of the head so as to form a continuous unfluted rim portion, preventing the chips and cut material from escaping from the flutes after the head has reached its countersunk position, thus exerting a maximum tightening effect.
With the foregoing and other objects in View which will appear as' the description proceeds, the invention resides in the combination and arrangement of parts and in the details of construction hereinafter described and claimed, it being understood that changes in the precise embodiment of the invention herein disclosed, can be made within the scope of what is claimed, without departing from the spirit of the invention.
In the drawings accompanying this specification and forming a part thereof, the preferred embodiment of my invention is illustrated, in which Figure 1 is a View in elevation of a screw l head formed along the lines of my invention. Fig. 2 is a cross sectional view taken on the line 2 2, looking in the direction of the arrow. Figs. 3, 4 and 5 are sectional views taken on the lines 3 3, 4 4 and 5 5 respectively, of Fig.-l.v y
Referring to the drawings in which similar reference numerals designate corresponding partsthroughout the several views, the
. screw includes the usual shank 6', of which a portion only has been depicted and above which extends the beveled head 7. The slot 8 extends transversely of the head and the screw as thus far described is of the conventional construction.
The conical surface 9 of the screw head is provided with a multiplicity of flutes l0. Each flute 10 is in transverse section as illustrated in Figs. 2, 3 and 4, substantially V- shape with the one surface l1 extending substantially radial and with the adjoining surface l2 disposed at an angle thereto, thus defining the cutting edge 13. The flutes gradually taper in depth, diminishing toward their upper extremity and gradually merge into the conical surface at a point below the top surface of the screw head. Thus an unbroken conical surface or rim 14 is defined above the upper extremities of the flutes, as apparent from Figs. l and 2. The flutes gradually deepen toward their lower extremities and project a slight distance below the cylindrical surface of the shank 6. The curvature of the flutes is of helical characteristics, winding or twisting about the head in a direction opposite to that of rotation during the insertion of the screw.
Vith the screw head as thus formed, a continually increasing tightening eect will be obtained as the head is driven into the wood. The lower portion ofthe beveled head being provided with deep and sharp flutes readily cuts the wood, thus providing for the countersinking of the lower portion of the head. The chips and out material will be passed upwardly within the flutes and will escape therefrom. As the head is driven into the wood, the opening defined by the flutes and adjacent wall of the wood becomes more restricted and the chips gradually clog. The decreasing depth of the flutes amplifies this clogging action until such time that the upper extremities of the flutes pass below the surface of the wood. At this point a maximum tightening effect will be obtained, preventing the head from passing below the surface of the wood as will be readily apparent. The rim 14, the continuity of whose surface has been preserved, exerts the proper wedging action upon the wood to thus insure a firm purchase thereon and the requisite tightening effect of the screw. The gradual decrease in the depth of the flutes provides for different degrees of tightening or holding effect at intermediate points in the countersinking action of the head. Thus the depth to which the head is countersunk may be taken as an indication of the tightening action or effect exerted by the screw. Particular attention is called to the fact that the flutes intersect at their lower extremities to form a plurality of knife-'like e'dges 15 Which are slightly curved as illustrated in Fig. 1,providing for an efiicacious and rapid cutting action at this zone.
Having thus fully described my invention. What I claim is A frusto-conical head for Wood screws, comprising a beveled surface provided With a multiplicity of flutes intersecting throughout their extremities adjacent the apex of the head and diverging at their other eX- tremities to define a multiplicity of in- Wardly curved thin cutting blades With relatively Wide clearing spaces, the amount of unbroken surface of the head increasing toward the top thereof and finishing at an unbroken rim.
In testimony that I claim the foregoing as my own, I have hereto aixed my signature in the presence oftwo Witnesses.
ERNEST M. BRUMBACK.
Witnesses:
E` WooDHULL, H. L. OAKES.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US84057914A US1151861A (en) | 1914-05-23 | 1914-05-23 | Countersinking screw-head. |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US84057914A US1151861A (en) | 1914-05-23 | 1914-05-23 | Countersinking screw-head. |
Publications (1)
Publication Number | Publication Date |
---|---|
US1151861A true US1151861A (en) | 1915-08-31 |
Family
ID=3219932
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US84057914A Expired - Lifetime US1151861A (en) | 1914-05-23 | 1914-05-23 | Countersinking screw-head. |
Country Status (1)
Country | Link |
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US (1) | US1151861A (en) |
Cited By (40)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3322019A (en) * | 1964-07-28 | 1967-05-30 | Screw & Bolt Corp Of America | Plasterboard screw |
US4764066A (en) * | 1985-04-22 | 1988-08-16 | Farley Metals, Inc. | Light gauge self-tapping sheet metal screw |
US5199839A (en) * | 1991-10-09 | 1993-04-06 | Abbott-Interfast Corporation | Fastener screw having improved installation and self-locking characteristics |
US5203657A (en) * | 1991-05-29 | 1993-04-20 | Topura Co., Ltd. | Self-tapping screw |
US5205694A (en) * | 1991-05-29 | 1993-04-27 | Topura Co., Ltd. | Self-tapping screw |
US5249882A (en) * | 1991-05-29 | 1993-10-05 | Topura Co., Ltd. | Self-tapping screw |
US5275601A (en) * | 1991-09-03 | 1994-01-04 | Synthes (U.S.A) | Self-locking resorbable screws and plates for internal fixation of bone fractures and tendon-to-bone attachment |
US5772376A (en) * | 1995-05-29 | 1998-06-30 | Ejot Verbindungstechnik Gmbh & Co. Kg | Countersunk head screw |
WO2004026159A1 (en) * | 2002-09-17 | 2004-04-01 | Depuy Spine Sarl | Cervical vertebra plate |
US20040193164A1 (en) * | 2003-03-27 | 2004-09-30 | Orbay Jorge L. | Anatomical distal radius fracture fixation plate and methods of using the same |
US20050063796A1 (en) * | 2003-09-05 | 2005-03-24 | Robert Dicke | Countersunk screw |
US20050065528A1 (en) * | 2002-12-10 | 2005-03-24 | Orbay Jorge L. | Method of endosteal nailing |
US20050281634A1 (en) * | 2004-06-18 | 2005-12-22 | Patricia Tibbenham | Waffle stud for insert molded plastic members |
US20070043366A1 (en) * | 2003-04-03 | 2007-02-22 | Medartis Ag | Housing for a locking element and locking element |
US7527639B2 (en) | 2000-02-01 | 2009-05-05 | Depuy Products, Inc. | Fixation system with multidirectional bone supports |
US7563263B2 (en) | 2000-02-01 | 2009-07-21 | Depuy Products, Inc. | Intramedullary fixation device for metaphyseal long bone fractures |
US20100069970A1 (en) * | 2008-09-16 | 2010-03-18 | Lewis Derek S | Orthopedic compression screw |
US7695502B2 (en) | 2000-02-01 | 2010-04-13 | Depuy Products, Inc. | Bone stabilization system including plate having fixed-angle holes together with unidirectional locking screws and surgeon-directed locking screws |
US7727264B2 (en) | 2000-02-01 | 2010-06-01 | Depuy Products, Inc. | Intramedullary fixation device for metaphyseal long bone fractures |
US7905909B2 (en) | 2005-09-19 | 2011-03-15 | Depuy Products, Inc. | Bone stabilization system including multi-directional threaded fixation element |
US20110238122A1 (en) * | 2008-10-31 | 2011-09-29 | Georg Gradl | Implant and bone screw having interlocking cams |
US20110313466A1 (en) * | 2010-06-17 | 2011-12-22 | Butler Michael S | Spinal Facet Bone Screw System |
EP2522865A1 (en) * | 2011-05-12 | 2012-11-14 | Berner Trading Holding GmbH | Countersunk head screw |
US20160290382A1 (en) * | 2015-03-30 | 2016-10-06 | Illinois Tool Works Inc. | Fastener with saw tooth perimeter |
US20160297542A1 (en) * | 2015-04-10 | 2016-10-13 | The Boeing Company | Lightning damage resistant aircraft skin fasteners |
US9554837B2 (en) | 2007-05-03 | 2017-01-31 | Medartis Ag | Device for fixing an elongate element in a retaining structure |
US9581183B2 (en) | 2015-02-17 | 2017-02-28 | The Hillman Group, Inc. | Screw-type fastener |
US20170254346A1 (en) * | 2016-03-06 | 2017-09-07 | Christopher Adam McLeod | Threaded post with negative ribs |
US20190162224A1 (en) * | 2016-09-01 | 2019-05-30 | Teng-Hung Lin | Screw capable of cutting and compressing dregs in an object to be drilled |
US10436238B2 (en) | 2016-04-04 | 2019-10-08 | The Hillman Group, Inc. | Screw type fastener |
US10480559B2 (en) * | 2012-05-10 | 2019-11-19 | Simpson Strong-Tie Company, Inc. | Fastener with head cutting structure |
WO2020125890A1 (en) | 2018-12-19 | 2020-06-25 | Dissing A/S | Screw with milling-ribs for countersinking the screw and use of the screw |
US10982703B2 (en) | 2018-04-09 | 2021-04-20 | The Hillman Group, Inc. | Screw-type fastener for concrete and hurricane resistance applications |
US11105361B2 (en) | 2017-11-03 | 2021-08-31 | The Hillman Group, Inc. | Screw-type fastener |
US11116557B2 (en) * | 2017-12-06 | 2021-09-14 | Stryker European Operations Holdings Llc | Orthopedic locking screw |
US11181138B2 (en) | 2013-03-26 | 2021-11-23 | Simpson Strong-Tie Company, Inc. | Variable thread knurl fastener |
US11346388B2 (en) * | 2017-11-01 | 2022-05-31 | Dissing A/S | Screw with tapered screw-head, use of a screw and a method for countersinking the screw |
US11396900B2 (en) * | 2019-05-10 | 2022-07-26 | The Boeing Company | Fastener and methods of manufacturing and use |
USD981833S1 (en) * | 2021-08-12 | 2023-03-28 | Taiwan Shan Yin International Co., Ltd. | Screw head |
US11879491B2 (en) | 2018-12-19 | 2024-01-23 | Dissing A/S | Screw with milling-ribs for countersinking the screw and use of the screw |
-
1914
- 1914-05-23 US US84057914A patent/US1151861A/en not_active Expired - Lifetime
Cited By (63)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3322019A (en) * | 1964-07-28 | 1967-05-30 | Screw & Bolt Corp Of America | Plasterboard screw |
US4764066A (en) * | 1985-04-22 | 1988-08-16 | Farley Metals, Inc. | Light gauge self-tapping sheet metal screw |
US5203657A (en) * | 1991-05-29 | 1993-04-20 | Topura Co., Ltd. | Self-tapping screw |
US5205694A (en) * | 1991-05-29 | 1993-04-27 | Topura Co., Ltd. | Self-tapping screw |
US5249882A (en) * | 1991-05-29 | 1993-10-05 | Topura Co., Ltd. | Self-tapping screw |
US5275601A (en) * | 1991-09-03 | 1994-01-04 | Synthes (U.S.A) | Self-locking resorbable screws and plates for internal fixation of bone fractures and tendon-to-bone attachment |
US5199839A (en) * | 1991-10-09 | 1993-04-06 | Abbott-Interfast Corporation | Fastener screw having improved installation and self-locking characteristics |
US5772376A (en) * | 1995-05-29 | 1998-06-30 | Ejot Verbindungstechnik Gmbh & Co. Kg | Countersunk head screw |
US7527639B2 (en) | 2000-02-01 | 2009-05-05 | Depuy Products, Inc. | Fixation system with multidirectional bone supports |
US9480512B2 (en) | 2000-02-01 | 2016-11-01 | Biomet C.V. | Volar fixation system with fixed-angle multi-hole drill guide |
US9492213B2 (en) | 2000-02-01 | 2016-11-15 | Biomet C.V. | Volar fixation system |
US8403967B2 (en) | 2000-02-01 | 2013-03-26 | Biomet C.V. | Volar fixation system and methods of using the same |
US9572609B2 (en) | 2000-02-01 | 2017-02-21 | Biomet C.V. | Method of using a volar bone plate on a fracture |
US7780711B2 (en) | 2000-02-01 | 2010-08-24 | Depuy Products, Inc. | Fixation system with multidirectional bone supports |
US7727264B2 (en) | 2000-02-01 | 2010-06-01 | Depuy Products, Inc. | Intramedullary fixation device for metaphyseal long bone fractures |
US7695502B2 (en) | 2000-02-01 | 2010-04-13 | Depuy Products, Inc. | Bone stabilization system including plate having fixed-angle holes together with unidirectional locking screws and surgeon-directed locking screws |
US7563263B2 (en) | 2000-02-01 | 2009-07-21 | Depuy Products, Inc. | Intramedullary fixation device for metaphyseal long bone fractures |
WO2004026159A1 (en) * | 2002-09-17 | 2004-04-01 | Depuy Spine Sarl | Cervical vertebra plate |
US20060142766A1 (en) * | 2002-09-17 | 2006-06-29 | Bernd Schafer | Cervical vertebra plate |
US7229442B2 (en) * | 2002-09-17 | 2007-06-12 | DePuy Spine Sàrl | Cervical vertebra plate |
US7780664B2 (en) | 2002-12-10 | 2010-08-24 | Depuy Products, Inc. | Endosteal nail |
US20050065520A1 (en) * | 2002-12-10 | 2005-03-24 | Orbay Jorge L. | Endosteal nail |
US7425213B2 (en) | 2002-12-10 | 2008-09-16 | Depuy Products, Inc. | Method of endosteal nailing |
US20050065528A1 (en) * | 2002-12-10 | 2005-03-24 | Orbay Jorge L. | Method of endosteal nailing |
US8579946B2 (en) | 2003-03-27 | 2013-11-12 | Biomet C.V. | Anatomical distal radius fracture fixation plate |
US7857838B2 (en) | 2003-03-27 | 2010-12-28 | Depuy Products, Inc. | Anatomical distal radius fracture fixation plate |
US20040193164A1 (en) * | 2003-03-27 | 2004-09-30 | Orbay Jorge L. | Anatomical distal radius fracture fixation plate and methods of using the same |
US20070043366A1 (en) * | 2003-04-03 | 2007-02-22 | Medartis Ag | Housing for a locking element and locking element |
US9155577B2 (en) * | 2003-04-03 | 2015-10-13 | Medartis Ag | Housing for a locking element and locking element |
US20050063796A1 (en) * | 2003-09-05 | 2005-03-24 | Robert Dicke | Countersunk screw |
US7334976B2 (en) * | 2003-09-05 | 2008-02-26 | A—Z Ausrustung und Zubehor GmbH & Co. KG | Countersunk screw |
US9072558B2 (en) | 2003-09-17 | 2015-07-07 | Biomet C.V. | Distal radius fracture fixation plate with ulnar buttress |
US8556945B2 (en) | 2003-09-17 | 2013-10-15 | Biomet C.V. | Anatomical distal radius fracture fixation plate with ulnar buttress |
US7156598B2 (en) * | 2004-06-18 | 2007-01-02 | Ford Global Technologies, Llc | Waffle stud for insert molded plastic members |
US20050281634A1 (en) * | 2004-06-18 | 2005-12-22 | Patricia Tibbenham | Waffle stud for insert molded plastic members |
US7905909B2 (en) | 2005-09-19 | 2011-03-15 | Depuy Products, Inc. | Bone stabilization system including multi-directional threaded fixation element |
US9554837B2 (en) | 2007-05-03 | 2017-01-31 | Medartis Ag | Device for fixing an elongate element in a retaining structure |
US8394132B2 (en) * | 2008-09-16 | 2013-03-12 | Orthohelix Surgical Designs, Inc. | Orthopedic compression screw |
US20100069970A1 (en) * | 2008-09-16 | 2010-03-18 | Lewis Derek S | Orthopedic compression screw |
US8323321B2 (en) * | 2008-10-31 | 2012-12-04 | M.O.R.E. Medical Solutions Gmbh | Implant and bone screw having interlocking cams |
US20110238122A1 (en) * | 2008-10-31 | 2011-09-29 | Georg Gradl | Implant and bone screw having interlocking cams |
US20110313466A1 (en) * | 2010-06-17 | 2011-12-22 | Butler Michael S | Spinal Facet Bone Screw System |
EP2522865A1 (en) * | 2011-05-12 | 2012-11-14 | Berner Trading Holding GmbH | Countersunk head screw |
US10480559B2 (en) * | 2012-05-10 | 2019-11-19 | Simpson Strong-Tie Company, Inc. | Fastener with head cutting structure |
US11181138B2 (en) | 2013-03-26 | 2021-11-23 | Simpson Strong-Tie Company, Inc. | Variable thread knurl fastener |
US9581183B2 (en) | 2015-02-17 | 2017-02-28 | The Hillman Group, Inc. | Screw-type fastener |
US10247219B2 (en) | 2015-02-17 | 2019-04-02 | The Hillman Group, Inc. | Screw-type fastener |
US20160290382A1 (en) * | 2015-03-30 | 2016-10-06 | Illinois Tool Works Inc. | Fastener with saw tooth perimeter |
US9856901B2 (en) * | 2015-03-30 | 2018-01-02 | Illinois Tool Works Inc. | Fastener with saw tooth perimeter |
US9669942B2 (en) * | 2015-04-10 | 2017-06-06 | The Boeing Company | Lightning damage resistant aircraft skin fasteners |
US20160297542A1 (en) * | 2015-04-10 | 2016-10-13 | The Boeing Company | Lightning damage resistant aircraft skin fasteners |
US20170254346A1 (en) * | 2016-03-06 | 2017-09-07 | Christopher Adam McLeod | Threaded post with negative ribs |
US10436238B2 (en) | 2016-04-04 | 2019-10-08 | The Hillman Group, Inc. | Screw type fastener |
US10563687B2 (en) * | 2016-09-01 | 2020-02-18 | Fong Pypan Industrial Co., LTD. | Screw capable of cutting and compressing dregs in an object to be drilled |
US20190162224A1 (en) * | 2016-09-01 | 2019-05-30 | Teng-Hung Lin | Screw capable of cutting and compressing dregs in an object to be drilled |
US11346388B2 (en) * | 2017-11-01 | 2022-05-31 | Dissing A/S | Screw with tapered screw-head, use of a screw and a method for countersinking the screw |
US11105361B2 (en) | 2017-11-03 | 2021-08-31 | The Hillman Group, Inc. | Screw-type fastener |
US11116557B2 (en) * | 2017-12-06 | 2021-09-14 | Stryker European Operations Holdings Llc | Orthopedic locking screw |
US10982703B2 (en) | 2018-04-09 | 2021-04-20 | The Hillman Group, Inc. | Screw-type fastener for concrete and hurricane resistance applications |
WO2020125890A1 (en) | 2018-12-19 | 2020-06-25 | Dissing A/S | Screw with milling-ribs for countersinking the screw and use of the screw |
US11879491B2 (en) | 2018-12-19 | 2024-01-23 | Dissing A/S | Screw with milling-ribs for countersinking the screw and use of the screw |
US11396900B2 (en) * | 2019-05-10 | 2022-07-26 | The Boeing Company | Fastener and methods of manufacturing and use |
USD981833S1 (en) * | 2021-08-12 | 2023-03-28 | Taiwan Shan Yin International Co., Ltd. | Screw head |
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US848632A (en) | Bit. | |
US433683A (en) | Auger-bit | |
US196309A (en) | Improvement in wood-screws | |
US782368A (en) | Bit. |