US3124408A - Screw fasteners and terminal boards incorporating the same - Google Patents

Screw fasteners and terminal boards incorporating the same Download PDF

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Publication number
US3124408A
US3124408A US17309462A US3124408A US 3124408 A US3124408 A US 3124408A US 17309462 A US17309462 A US 17309462A US 3124408 A US3124408 A US 3124408A
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US
United States
Prior art keywords
thread
shank
workpiece
fastener
screw
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Expired - Lifetime
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English (en)
Inventor
Louis Oesterreicher
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GEN AM TRANSPORT
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GEN AM TRANSPORT
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Priority to US17309462 priority Critical patent/US3124408A/en
Priority to GB46460/62A priority patent/GB981075A/en
Priority to DE19621400824 priority patent/DE1400824A1/de
Priority to NL286797D priority patent/NL286797A/nl
Priority to FR918946A priority patent/FR1341311A/fr
Application granted granted Critical
Publication of US3124408A publication Critical patent/US3124408A/en
Anticipated expiration legal-status Critical
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/28—Clamped connections, spring connections
    • H01R4/30—Clamped connections, spring connections utilising a screw or nut clamping member
    • H01R4/307—Clamped connections, spring connections utilising a screw or nut clamping member characterised by the thread of the screw or nut
    • 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
    • F16B25/00—Screws that cut thread in the body into which they are screwed, e.g. wood screws
    • F16B25/001—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by the material of the body into which the screw is screwed
    • F16B25/0021—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by the material of the body into which the screw is screwed the material being metal, e.g. sheet-metal or aluminium
    • 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
    • F16B25/00—Screws that cut thread in the body into which they are screwed, e.g. wood screws
    • F16B25/0036—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by geometric details of the screw
    • F16B25/0042—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by geometric details of the screw characterised by the geometry of the thread, the thread being a ridge wrapped around the shaft of the screw
    • F16B25/0057—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by geometric details of the screw characterised by the geometry of the thread, the thread being a ridge wrapped around the shaft of the screw the screw having distinct axial zones, e.g. multiple axial thread sections with different pitch or thread cross-sections
    • 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
    • Y10S411/999—Expanded, threaded, driven, headed, tool-deformed, or locked-threaded fastener with retainer, e.g. tether

Definitions

  • Another object of the invention is to provide a screw fastener of the type described, wherein the ready movements of the screw fastener between its set and partially withdrawn positions with respect to the associated workpiece are established by two separate threads carried by the shank of the screw fastener and their respective cooperations with threaded structure formed in the workpiece in the initial forward driving of the screw fastener into its set position with respect to the workpiece.
  • a further object of the invention is to provide the combination of a terminal strip and a screw fastener of the type described, whereby the screw fastener serves as a terminal screw in the combination and may be readily operated as required between its set and partially Withdrawn positions for the purpose of selectively making secure external electrical connections with respect to the terminal strip.
  • a still further object of the invention is to provide the assembled combination of a terminal board formed of electrical insulating material, a terminal element carried by the terminal board and a screw fastener of the type described carried by the terminal element and serving as a terminal screw for the terminal element, wherein the terminal screw may be readily operated as required between its set and partially withdrawn positions, without the possibility of excessive retrograde movement of the terminal screw and the consequent loss thereof from its assembled position with respect to the terminal element.
  • FIGURE 1 is a side elevational view of a screw fastener embodying the present invention
  • FIGURE 2 is a reduced front elevational view of a terminal element carried by the illustrated fragmentary portion of a terminal board, which terminal element is adapted to carry, as a terminal screw therefor, the screw fastener of FIG. 1;
  • FIG. 3 is a reduced rear elevational view of the terminal element and the associated fragmentary portion of the terminal board, as shown in FIG. 2;
  • FIG. 4 is a reduced vertical sectional view of the terminal element and the associated fragmentary portion of the terminal board, as shown in FIGS. 2 and 3, this view being taken in the direction of the arrows along the line 4-4 in FIG. 2;
  • FIG. 5 is an elarged fragmentary vertical sectional view of the workpiece and the front portion of the shank of the screw fastener, illustrating the initial threaded structure that is formed in the workpiece by the action of the front thread that is carried by the front portion of the shank of the screw fastener of FIG. 1;
  • FIG. 6 is a fragmentary vertical sectional view, similar to FIG. 5 of the workpiece and the rear portion of the shank of the screw fastener, illustrating the final threaded structure that is formed in the workpiece by the combined actions of the front thread and the rear thread respectively carried by the front portion and the rear portion of the shank of the screw fastener of FIG. 1.
  • the screw fastener ltl is of the self-threading or self-tapping type and is especially adapted for use as the terminal screw in combination with an associated therminal element, as explained more fully hereinafter; whereby the head 12 comprises a binding head that is provided with the usual annular wire-receiving recess 12a disposed in the work-engaging face thereof and in surrounding relation with respect to the rear end of the shank 11. Also, the outer end of the head 12 carries a conventional slot 1211 that is adapted to receive the outer end of a screwdriver or other driving tool, in the usual manner.
  • a first rolled thread 20 is carried by the front portion 11a of the shank 11 and includes a number of helical turns and having a first fixed pitch; and a second rolled thread 30 is carried by the rear portion 11b of the shank 11 and includes a number of helical turns and having a second fixed pitch.
  • the frontmost turn of the first thread 20 terminates adjacent to the front end of the shank 11 and the rearmost turn of the second thread 3t) terminates adjacent to the rear end of the shank 11, while the rearmost turn of the first thread Zll and the frontmost turn of the second thread 30 both terminate adjacent to the boundary between the front and rear portions Ma and 11b of the shank 11 and closely adjacent to and in alignment with each other so that the first and second threads 20 and 3d constitute continuations of each other along the shank 11.
  • the sum of the lengths of the threads 2% and 3t along the shank 11 is equal to L1
  • the first thread 26 has a length along the shank ll. of L2
  • the second thread 33 has a length along the shank 11 of L3.
  • the shank 11 may have a No. 6 diameter, whereby the two threads Zll and 30 have substantially the same major diameter D1 and have substantially the same minor diameter D2.
  • the first thread 20 has a relatively coarse pitch corresponding to twenty-four threads per inch of the front portion 11a of the shank ll; while the second thread 3% has a relatively fine pitch corresponding to thirty-two threads per inch of the rear portion 11b of the shank ii.
  • the extreme front end of the shank 11 is provided with a pilot end portion, indicated at 11c that has a diameter somewhat smaller than the minor diameter D2 of the first thread 20 so as to facilitate insertion thereof into the pilot hole provided in the associated workpiece.
  • the leading portion 21a of the frontmost turn 21 of the first thread 20 has a crest diameter that is smaller than the major diameter D1 of the first thread 20; the trailing portion 22a of the rearmost turn 22 of the first thread 20 has a crest diameter that is smaller than the major diameter D1 of the first thread 26; and the leading portion 31a of the frontmost thread 31 of the second thread 30 has a crest diameter that is smaller than the major diameter D1 of the second thread 31).
  • the front end of the first thread 29 is forwardly and inwardly tapered, as indicated by the broken line 21x; the rear end of the first thread 2i is rearwardly and inwardly tapered, as indicated by the broken line 21y; and the front end of the second thread 30 is forwardly and inwardly tapered, as indicated by the broken line 31x.
  • the crests of the turns have a substantially V-shape; while in the second thread 3%, the crests of the turns have a small amount of truncation.
  • the roots of the turns have a great amount of truncation; while in the second thread 36, the roots of the turns have a small amount of truncation.
  • the screw should be utilized in a workpiece, indicated at 40 that has a thickness T that is somewhat less than the length L3 of the second thread 30 so that the front end of the second thread Tall projects entirely through the threaded structure provided in the workpiece 4-9 when the screw it) occupies its set position.
  • the front end of the second thread 30 projects by the distance L4 through the workpiece 4% whereby the length L3 of the second thread 3i? along the shank 11 of the screw it is equal to the thickness T of the workpiece 49 plus the distance L4.
  • the screw It may be formed, for example, of steel, and involving a rolling step and utilizing a forged blank.
  • the blank mentioned comprises the upset head 12 and the adjacent shank 11 formed integrally therewith, the shank 11 including the substantially cylindrical body portion and the forwardly tapered front end portion.
  • the blank mentioned is subjected to the rolling step noted, involving rolling dies, whereby simultaneously the first thread is formed upon the front portion 11a of the shank l1 and the second thread 3th is formed upon the rear portion lllb of the shank 11, as previously described in conjunction with FIG. 1.
  • the configuration of the threads 20 and are completely defined in the single rolling step mentioned; and thereafter, the screw 16 is subjected to a heat-hardening step in order to effect corresponding hardening of the threads 20 and 30, in the usual manner.
  • the screw 10 may be provided with a finished coating of cadmium, or the like, in a conventional manner.
  • a substantially cylindrical pilot hole 40a is initially provided through the workpiece 48 that may be formed of a metal, such as brass, mild steel, etc.
  • the forwardly tapered pilot end 110 of the shank 11 is inserted into the front side of the pilot hole ida.
  • the screw 10 is pressed home and rotated, in the usual manner, whereby in the initial driving thereof, the first thread 20 provided upon the front portion 11a of the shank 11 forms a corresponding first threaded structure 41 interiorly of the pilot hole 49a in the workpiece; the first threaded structure 4-1 comprises an internal thread having a pitch of corresponding to that of the first thread 2%, as shown in FIG. 5.
  • the first thread 2% moves forwardly out of the first threaded structure 41 provided interioriy of the pilot hole 49a in the workpiece 40 and the second thread 39 moves forwardly into the first threaded structure ii mentioned.
  • the screw lit is driven further forwardly into its set position with respect to the workpiece 465, as shown in FIG.
  • the second thread 313 breaksup the first threaded structure 41 mentioned and forms a corresponding second threaded structure interiorly of the pilot hole 40a in the workpiece 46'; which second threaded structure 42 comprises an internal thread having a pitch of corresponding to that of the second thread 35
  • the formation of the second threaded structure 42 in the workpiece 46 by the second thread 3% carried upon the rear portion 11b of the shank 11 mutilates the first threaded structure 41 that was initially formed in the workpiece 40 by the first thread 20 carried by the front portion 11a of the shank 11.
  • the screw fastener 10. is admirably suited for use as the terminal screw for a terminal element carried by a terminal board, which combination is illustrated in FIGS. 2 to 4, inclusive.
  • the terminal board 50 comprises a sheet of electrical insulating material and may be formed of a suitable phenol-formaldehyde resin.
  • Two adjacent holes 51 and 52 are provided through the terminal board 5%) and a counter recess 53 is provided in the rear side of the terminal board 50 in surrounding relation with respect to the hole 52 therethrough so as to provide an internal ledge 54 in surrounding relation With respect to the hole 52, as clearly illustrated in FIG. 4.
  • the combination comprises a terminal element 69 that includes a rearwardly projecting terminal clip 61 and an adjacent rearwardly projecting substantially cylindrical barrel 62.
  • the terminal element 60 is assembled on the front side of the terminal board 50 with the terminal clip 61 projecting through the hole 51 and with the substantially cylindrical barrel 62 projecting through the hole 52.
  • a suitable clamping tool is utilized to upset the extreme inner end of the barrel 62, so as to provide a surrounding annular flange 62a thereon in engagement with the adjacent surface of the ledge 54; whereby the barrel 62 frictionally secures the terminal element 60 in place upon the front side of the terminal board 50, in the general manner of an eyelet.
  • the front side of the terminal element 6% comprises a pair of upstanding and forwardly projecting ears 63, as shown in FIGS. 2 and 4, that are utilized for the conventional purpose of limiting movement of an external electrical connection that is made to the terminal element 60.
  • the permanent electrical connection is made to the terminal clip 61 and the removable electrical connection is selectively made to the frontside of the element 60, utilizing the screw fastener 16* as the terminal screw. Also, it is mentioned that it is conventional to provide a coating of tin upon the terminal element 6!) truncation and the roots of the turns of said second thread in order to facilitate the electrical connections mentioned I and particularly to facilitate soldering of the permanent electrical connection to the terminal clip 61.
  • the terminal screw 110 may be readily operated as required between its set position and its partially withdrawn position with respect to the barrel 562 for the purpose of selectively connecting and disconnecting the removable electrical connection or terminal with respect to the terminal element 6%; which operations of the .terminal screw it) do not mutilate the second threaded structure mentioned that is formed internally of the pilot hole 6217 provided in the barrel 62, as previously explained.
  • terminal board a terminal element carried by the terminal board
  • terminal screw carried by the terminal element
  • the terminal screw is of the construction and arrangement described, so that after initial driving of the terminal screw with respect to the terminal element, the same is securely electrical connections to the terminal element.
  • a screw fastener of the self-threading type comprising an elongated shank, an enlarged head terminating the rear end of said shank, a first thread carried by the front portion of said shank and including a number of helical turns and having a first fixed pitch, and a second thread carried by the rear portion of said shank and including a number of helical turns and having a second fixed pitch, the frontmost turn of said first thread terminating adjacent to the front end of said shank and the rearmost turn of said second thread terminating adjacent to the rear end of said shank, the rearmost turn of said first thread having a small amount of truncation, whereby in the forward driving movement of said fastener into a set position with respect to an associated workpiece said first thread forms a corresponding first threaded structure in the workpiece pilot hole and then said second thread breaks-up the first threaded structure mentioned and forms a corresponding second threaded structure in the workpiece pilot hole, and whereby in initial retrograde movement ,ofsaidfastener from
  • a screw fastener of the self-threading type comprising an elongated shank, an enlarged head terminating the rear end of said shank, a first thread carried by the front portion of said shank and including a number of helical turns and having a first fixed pitch, and a second thread carried by, the rear portion of said shank and including a number of helical turns and having a second fixed pitch, the frontmost turn of said first thread terminating adjacent to the front end of said shank and the rearmost turn of said second thread terminating adjacent to the rear end of said shank, the rearmost turn of said first thread and the frontmost turn of said secondthread both terminating adjacent to the boundary between the front and rear portions of said shank and closely adjacent to and in alignment with each other so that said first and second threads constitute continuations of each other along said shank, said first and second threads having substantially the same major diameter and having substantially the same minor diameter and said first pitch being largerthan said second pitch, whereby in the forward driving movement of said fastener into a set position with respect to
  • a screw fastener of the self-threading type comprising an elongated shank, an enlarged head terminating the rear end of said shank, a first rolled thread carried by the front portion of said shank and including a num ber of helical turns and having a first fixed pitch, and a second rolled thread carried by the rear portion of said shank and including a number of helical turns and having snaanos a a second fixed pitch, the frontmost turn of said shank thread terminating adjacent to the front end of said shank and the rearmost turn of said second thread terminating adjacent to the rear end of said shank, the rearmost turn of said first thread and the frontmost turn of said second thread both terminating adjacent to the boundary between the front and rear portions of said shank and closely adjacent to and in alignment with each other so that said first and second threads constitute continuations of each other along said shank, said first and second threads having substantially the same major diameter and having substantially the same minor diameter and said first pitch being larger than said second pitch, whereby in the forward driving
  • a workpiece having a given thickness and provided with a threaded opening therethrough; and a screw fastener secured in place said threaded opening and readily movable with respect to said workpiece between a set position and a partially withdrawn position, said fastener being of the self-threading type and comprising an elongated shank, a first thread carried by the front portion of said shank and including a number of helical turns and having a first fixed pitch, and a second thread carried by the rear portion of said shank and including a number of helical turns and having a second fixed pitch, the frontmost turn of said first thread terminating adjacent to the front end of said shank and the rearmost turn of said second thread terminating adjacent to the rear end of said shank, the rearmost turn of said first thread and the frontmost turn of said second thread both terminating adjacent to the boundary between the front and rear portions of said shank and closely adjacent to and in alignment with each other so that said first and second threads constitute continuations of each other along said shank, said first and second thread
  • a terminal strip having a given thickness and provided with a threaded opening therethrough; and a terminal screw secured in place in said threaded opening and readily movable with respect to said terminal strip between a set position and a partially withdrawn position, said terminal screw being of the selfthreading type and comprising an elongated shank, a first thread carried by the front portion of said shank and including a number of helical turns and having a first fixed pitch, and a second thread carried by the rear portion of said shank and including a number of helical turns and having a second fixed pitch, the frontmost turn of said first thread terminating adjacent to the front end of said shank and the rearmost turn of said second thread terminating adjacent to the rear end of said shank, the rearmost turn of said first thread and the frontmost turn of said second thread both terminating adjacent to the boundary between the front and rear portions of said shank and closely adjacent to and in alignment with each other so that said first and second threads constitute continuations of each other along said shank, said first and second thread
  • a terminal board formed of electrical insulating material and having a hole formed therethrough; a terminal element carried by said board and including a body arranged in said hole and frictionally secured in place therein, said body having a given length and provided with a threaded opening therethrough; and a terminal screw secured in place in said threaded opening and readily movable with respect to said body between a set position and a partially withdrawn position,
  • said terminal screw being of the self-threading type and comprising an elongated shank, a first thread carried by the front portion of said shank and including a number of helical turns and having a first fixed pitch, and a second thread carried by the rear portion of said shank and including a number of helical turns and having a second fixed pitch, the frontmost turn of said first thread terminating adjacent to the front end of said shank and the rearmost turn of said second thread terminating adjacent to the rear end of said shank, the rearmost turn of said first thread and the frontmost turn of said second thread both terminating adjacent to the boundary between the front and rear portions of said shank and closely adjacent to and in alignment with each other so that said first and second threads constitute continuations of each other along said shank, said first and second threads having substantially the same major diameter and corresponding to that of said threaded opening, said first and second threads having substantially the same minor diameter and corresponding to that of said threaded opening, said first and second pitches being substantially different from each other and said second pitch corresponding to

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Geometry (AREA)
  • Manufacturing Of Electrical Connectors (AREA)
  • Multi-Conductor Connections (AREA)
  • Coupling Device And Connection With Printed Circuit (AREA)
  • Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
  • Dowels (AREA)
US17309462 1962-02-13 1962-02-13 Screw fasteners and terminal boards incorporating the same Expired - Lifetime US3124408A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
US17309462 US3124408A (en) 1962-02-13 1962-02-13 Screw fasteners and terminal boards incorporating the same
GB46460/62A GB981075A (en) 1962-02-13 1962-12-10 Screw fasteners
DE19621400824 DE1400824A1 (de) 1962-02-13 1962-12-12 Schraubenbefestigungsmittel
NL286797D NL286797A (nl) 1962-02-13 1962-12-14 Bevestigingsschroef
FR918946A FR1341311A (fr) 1962-02-13 1962-12-18 Vis de fixation et sa combinaison avec une plaque de connexion

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US17309462 US3124408A (en) 1962-02-13 1962-02-13 Screw fasteners and terminal boards incorporating the same

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US3124408A true US3124408A (en) 1964-03-10

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US (1) US3124408A (nl)
DE (1) DE1400824A1 (nl)
FR (1) FR1341311A (nl)
GB (1) GB981075A (nl)
NL (1) NL286797A (nl)

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US4216934A (en) * 1978-03-06 1980-08-12 The Siemon Company Universal mounting bracket for circuit blocks
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US4919578A (en) * 1988-06-09 1990-04-24 Martin Marietta Rivetless nut plate and fastener
US5020952A (en) * 1988-06-09 1991-06-04 Martin Marietta Corporation Rivetless nut plate and fastener
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US5964768A (en) * 1993-01-21 1999-10-12 Acumed, Inc. Tapered bone screw with continuously varying pitch
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FR2803695A1 (fr) * 2000-01-12 2001-07-13 Peugeot Citroen Automobiles Sa Dispositif de fixation d'un organe electrique sur un support en materiau electrique conducteur
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EP1233194A2 (de) * 2001-02-19 2002-08-21 HILTI Aktiengesellschaft Betonschraube
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US6666638B2 (en) 2001-02-15 2003-12-23 Phillips Screw Company Deck screw having multiple threaded sections
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US20050101961A1 (en) * 2003-11-12 2005-05-12 Huebner Randall J. Bone screws
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DE102005047867A1 (de) * 2005-10-05 2007-04-19 Phoenix Contact Gmbh & Co. Kg Schraubverbindung, Schraubklemme und Reihenklemme
US7235079B2 (en) 2004-11-18 2007-06-26 Acumed Llc Composite bone fasteners
US20070147973A1 (en) * 2005-12-22 2007-06-28 Cyril Laan Dual threaded screw for composite materials
US20070212194A1 (en) * 2004-05-06 2007-09-13 Walter Benjamin L Methods and apparatus for coupling gas turbine engine components
US20070297871A1 (en) * 2006-06-26 2007-12-27 Ying-Kung Lu Power tap structure
US20080112775A1 (en) * 2006-11-12 2008-05-15 Tai-Ping Hsu Superdrilling Tri-shaft Screw
US20100068003A1 (en) * 2008-09-16 2010-03-18 Frank Wagner Anti-Cross Threading Screw
US20100243322A1 (en) * 2007-10-15 2010-09-30 Eldre Electrical connection terminal
US8011866B2 (en) 2001-08-20 2011-09-06 Maclean-Fogg Company Locking fastener assembly
US8070786B2 (en) 1993-01-21 2011-12-06 Acumed Llc System for fusing joints
US20120251264A1 (en) * 2011-03-28 2012-10-04 Wamlez Pty Ltd Fastener
JP2014529446A (ja) * 2011-08-25 2014-11-13 メドス・インターナショナル・エスエイアールエルＭｅｄｏｓ Ｉｎｔｅｒｎａｔｉｏｎａｌ ＳＡＲＬ 骨アンカー
US20140334898A1 (en) * 2011-03-28 2014-11-13 Wamlez Pty Ltd Fastener
US9161793B2 (en) 1993-01-21 2015-10-20 Acumed Llc Axial tension screw

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US20100068003A1 (en) * 2008-09-16 2010-03-18 Frank Wagner Anti-Cross Threading Screw
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JP2014529446A (ja) * 2011-08-25 2014-11-13 メドス・インターナショナル・エスエイアールエルＭｅｄｏｓ Ｉｎｔｅｒｎａｔｉｏｎａｌ ＳＡＲＬ 骨アンカー
US10321937B2 (en) 2011-08-25 2019-06-18 Medos International Sarl Bone anchors
US11202659B2 (en) 2011-08-25 2021-12-21 Medos International Sarl Bone anchors

Also Published As

Publication number Publication date
GB981075A (en) 1965-01-20
DE1400824A1 (de) 1968-10-17
FR1341311A (fr) 1963-10-25
NL286797A (nl) 1965-02-10

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