US2788046A - Screw thread construction comprising conventional truncated threads with integral locking thread interposed therebetween - Google Patents

Screw thread construction comprising conventional truncated threads with integral locking thread interposed therebetween Download PDF

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US2788046A
US2788046A US325960A US32596052A US2788046A US 2788046 A US2788046 A US 2788046A US 325960 A US325960 A US 325960A US 32596052 A US32596052 A US 32596052A US 2788046 A US2788046 A US 2788046A
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thread
locking
threads
primary
locking thread
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Rosan Joseph
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Rosan Joseph
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16BDEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS, WEDGES, JOINTS OR JOINTING
    • F16B33/00Features common to bolt and nut
    • F16B33/02Shape of thread; Special thread-forms
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16BDEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS, WEDGES, JOINTS OR JOINTING
    • F16B39/00Locking of screws, bolts or nuts
    • F16B39/22Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening
    • F16B39/28Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening by special members on, or shape of, the nut or bolt
    • F16B39/30Locking exclusively by special shape of the screw-thread
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10STECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S411/00Expanded, threaded, driven, headed, tool-deformed, or locked-threaded fastener
    • Y10S411/924Coupled nut and bolt
    • Y10S411/929Thread lock
    • Y10S411/938Distorted thread

Description

April 9, 1957 lSCREW THREAD CO TRUNCATED THREAD l Filed Dec. 15, 1952 A u i v f L u l a) N VENTIO ING 2 Shea SAN oN coMPRIsING con WITH INTEGRAL Locx SED THEREBETWEEN J. R NSTRUCTI THREADS INTERFO \mN Q Y ..Y A 4v, a mm 1 A.. @u A www uw N\ GLW N\ l f NAE N\ IRB y /Q SGE f 3 mmh v f PNE Mcmw Y OWO N RI P NN MMM v QN QN NN, `N WN NN NN .QN NT A NN l .l N t O D m R.

i y. N .f mu I, Tm 2 rum. m m. Y ...lumi 5 9 1 n l I w 9 D ..l.

STCREW-- THREAD CONSTRUCTION COMPRISING CONV ENTION AL TRUNCATED THREADS WITH INTEGRAL LOCKING THREAD INTERPOSED THEREBETWEEN Joseph Rosn,` Newportleach, Calif. Applicattonnecember 1s, 1952, seriarNo. 325,960`

s Claims; (Cl.151-22) My-'finventionv relates? to screw' threads and is-particu' lar'lyf.- directed' to improvements in mating thread constructionsto provide a controlledvdegree of interference when'assembled, inforder to resist separation of the mating parts.'

This applicationl is-related to my :zo-pending applica-v tion'si` Serial No. 309,960, ledSeptember 17, 1952, and SerialvNo. 313,280, tiled October 6, 1952. The rst of these .cases is concerned with an integral lockingvthread formed at the root of-a primary thread and the second is directed to a separately formed locking thread similarly located at the'root of a primary thread. The present invent-ionis ldirected tolan integral locking thread of the general'type disclosed'in Serial No. 309,960 but-which embodies certain features disclosed in connection with the separately formed locking'thread in Serial No. 313,280.

In`rnycolpendingapplications identified above, it is pointedoutfthat -proposediforms Yof screw thread devices having'vinterferinglparts at the crests'orvroots of the thread have'anotmet with 'universal acceptance. Thus, screw thread constructions such as that shown in the'Evans Patent No. 2,437,638 have not been widely adopted.l The metaladjacentlthe roots lof the threads on one member is-Yrequiredl to flow" orfotherwise be distorted laterally in af'dire'ction at right anglesto the direction of the applied squeezingvforces toproduce interference along theflanks ofthe'fthreads; The high unit stresses necessary to pro# duce this effect causegalling'along the anks.

The locking thread arrangement shown in the `Meerst'einervv PatentA No. 2,109 ,'7 7 8 employs a separate helical cutting element located adjacent the roots of primary threads1on abolt. The opposed ysharp corners of the helicalelement are'positioned to becomeembedded in the LmetalV ofthe bolt and the nut when they two are threaded together. The sharp corne-rs are relied upon to re'strainrelative rotation of the helical element andthe boltbut these corners produce highly objectionable localiz'ed 'stresses at the roots of the-primary thread of the bolt" Thisfis particularly undesirable in fastenings 'sub1 ject' to fatigue action under stress reversals or rapid changesl in magnitude of stress'.- The stress-raiser effect of the sharp corner digging into the metal/of 'thebolt atf'theroots of the -thread leads to fatigue failure and in consequence seriously reduces ,th'epermissible working stress '5to' becarried on the bolt.v

The/'principleobjectl of the presentinvention is to pro-v videa locking thread design whichfre'tains the advantages ofithel'integral` construction shown in said application SerialNo; 309,960, thereby eliminating the objectionable stress-'raiserleifects ofy Meersteiner, and at the same time embodying certain of the advantageous features of said application :Serial No.A 313,280. These advantageous featuresfre'late to the provision of a locking thread which islgenerally helical 'inform :but which has a varying non# constnt'ptch-with respect-'to the primary thread. The `gene'ra'llylfheh'ealelement is Vtherefdr'e shifted in its posii tion--relative 'f-to w the@ primary 'Y 'threads' in an undulating fmshlztithrougltauty its ulength? Thel undulation'* may be Patented Apr. 9, 1957 axial or in a radial direction, or both axial? and'^r`cli l The purpose of this construction is to enhance the'l'ck"- ing eiect achieved by interference with the crests: ofthe threads engaged by the locking element.

While my invention in its broader aspects` may' beferii' p'loyed with any one of a large number of 'thread forms; l have chosen to describe it in connection with American National threads of well-known conventional formi Threads under the American Nationaldesignation are V shaped with a 60 included angle' between the an'lis of adjacent threads, and in class 3 threads in this system the dimensional.tolerances are such that the flanks the mating threads may' haveclearance, but: not inter*- ference. The crests of the maleand femalethreadsfafre truncated. The secondary locking thread ofrny'n'vention engages these conventional truncated surfaces lin interferiing relationship. While my secondarylocking 'threa'dmar be located at the root of the male thread'orthe root of A"the female thread as desired, l prefer to locate the secondaryV locking thread at the root of the male thread wherever the strength of the metal of the male thread exceeds 'thato'f the female thread. member may be formed of steel while the female or" socket member may be formed of non-ferrous material,

for example, aluminum alloy. lf-the malev and female" members are `formed of the same material the secondary -iocliing thread may be placed on either member. @nev member carries the locking thread'and the other member is initially of standard conventional form. With these and other. objects in View aswill appear hereinafter reference is directed to the accompanyingl drawings in which:

Figure 1 is a sectional view partly broken away-showing a preferred embodiment of my invention. shown partially assembled on the bolt.

Figure 2 is a sectional View similar to'Figurelshow ing'the nut in engagement with the shoulder.

Figures 3, 4, and 5 are diagrammatic.v transverselsec tional views illustrating the mannerin which the position of the locking'thread element may be varied relative to the root of the primary thread on different locations along its'length to produce an undulatingaxial shiftin' thel locking thread constituting a departure from a true helix! Specically Figure'3 shows the locking Vthready shifted 'ito" the left with respect to the center of the root of the prii mary thread. Figure 4 shows a locking thread in a-tr'ue central position and, Figure 5 shows it shifted tothe right of the central position. shifting and the amount of the flank clearance are exag gerated for clarity 'of illustration.

Figure 6 illustrates another form ofthe invention and constitutes a transverse sectional view taken substantially on the lines 6 6 as shown in Figure l.

Figure 7 is a sectional view similar to Figure 1 showing a further modified construction in which thesecondary locking thread is located in the nut.

Referring to the drawings:

The nut it? may be provided with any suitable ordesi" able internal thread 11 and as shown in the drawings this internal thread may comprise an'Arnerican National, classi 3 thread of conventional form. The thread may be formed by any suitable or convenient means. The ilanks 12 and 13 of the internal thread 11 have a 60` included 'angle and the crest is truncated to form a cylindrical surface 14.H

The not itl and the internal thread llas thus described may be of conventional form.

A bolt 1.5 extends through an openingll in a istationaryf,y

Except'for the region adjacent the roots oflthe external"` thread 19, this thread `s conventionalandisproportioned In a typical installation the" male' Thel nut is' The extent Vofthe 'axial to mate with the internal thread 11 in the nut 10. The thread 19 is hereafter referred to as the primary thread.

In accordance with my invention l provide a secondary or locking thread generally designated 20 which is positioned between the convolutions of the larger thread 19 and adjacent the roots thereof. This secondary or locking thread is formed integrally with the bolt 1S and is generally (but not precisely) helical in shape. This secondary or locking thread is substantially symmetrical in crosssection and is rounded at its crest 21. It may be similar in form to the primary thread 19 except for the pronounced rounding of the crest 21 and fillets 22. These llets are positioned at the juncture of the root of the primary and secondary threads. The portions of the anks 23 and 24 of the primary thread 19 adjacent thc iillets 22 are preferably relieved as shown at 2S to provide necessary space for thread rolling tools and to allow fillets 22 of maximum size. The depth of the primary screw thread 19 may be from 31/2 to 7 times the depth of the secondary screw thread 2t) with good results.

Figure l shows how the truncated crests of the internal thread 11 are distorted when the nut and bolt are initially assembled. The crest surface designated 14 illustrates the conventional form of the thread crest before distortion occurs. When the threads 11 and i9 are screwed together the secondary or locking thread 2d presses into the crest 14 and deforme it laterally in both directions and also radially inwardly as shown by the enlargements at 26 and 26', while grooving and dividing it centrally. The deformed portions are spread laterally to increase the width of the crest and inwardly to increase the height of the thread and form an interference tit with the adjacent ilanks 23 and 24 of the primary thread 19. This crest dividing and distorting action is substantially symmetrical about the secondary thread 2d. The anlzs .i2 and 23 normally ride in engagement while the nut is being threaded on the bolt 15, although a very slight clearance 28' has been shown in Figure i, in contrast with a relatively greater clearance 28 between the flanks 13 and 24. The clearances are exaggerated in the drawings for purposes of illustration.

When the nut 10 is tightened against the shoulder 18, as shown in Figure 2, the iianks 23 on the primary thread 19 meet in substantially full surface engagement with the flanks 12 on the internal thread 1l, thereby eliminating any clearance 28 that may have been present. The clearance 28 between the flanks 24 and the iianlts 13 will then increase slightly. The iianks 12 and 23 are therefore placed in interfering engagement adjacent the roots of the thread 19 and the crest of the thread 11. it will be understood from this description that the axial load transmitted between the bolt and the nut 3!) is carried on the ilanks of the primary threads l1 and tif while the locking action is developed by the interfering engagement between the locking thread 2i! and the crests of the internal thread 11, supplemented by the interfering engagement of the anks 12 having the enlargements 26 with the anks 23, and the interfering engagement of the enlargements 26 with the flanks 24 adjacent the root. Thus, as the threads are tightened, the enlargements 26 and 25 tend to deform toward the right, as viewed in Figure 2. The degree of interference can be readily controlled in various ways, for example, by controlling the internal diameter of the crest 14. This diameter may obviously be changed by varying the size of the drill used prior to tapping of the threads 11 in the nut 1G. Varying the tap drill size is thus one effective means of varying the degree of interference.

Figures l and 2 illustrate the type of distortion which occurs between the locking thread 2G and the crests of the thread 11 on the other member whensuch other member is formed of softer material than the bolt member and locking thread. Thus, Figures l and 2 show the type of distortion which occurs when an all-steel bolt embodying my invention is threaded into a female thread provided on an aluminum alloy part. Most of the distortion occurs in the aluminum alloy part and the distortion will vary in accordance with the character of materials employed. The interfering engagement is particularly effective to prevent unscrewing movement of the parts under varying loads or vibration with or without accompanying temperature changes, and furthermore the parts may be assembled and disassembled a great many times without losing the locking effect.

As a speciic example, a diameter standard nut and bolt has 16 threads to the inch, and a clearance of about .G0075 of an inch between the confronting anks of the mating threads, or a total clearance of .0015 of an inch for each thread. In order to provide a positive lock, the crown of the thread 11 is distorted or expanded to an amount equal to about twice the total normal clearance, or about .0")3 of an inch. This provides a total excess of .G0l5 of an inch of metal on the deformed crown of the thread 11 to bind or be displaced back toward normal in effecting the lock. The same principle of distorting the thread to twice the total normal clearance applies also to the root clearance, in instances where locking engagement between the periphery of the crown of the thread lll and the root of the mating thread is desired. The locking element 2t) may be of any suitable height, as previously pointed out, and a height of .007 of an inch is satisfactory or the particular thread described.

In accordance with the present invention I prefer to preform a locking thread 20 with a non-uniform pitch so that it undulates with respect to the root of the primary thread 19. As shown in Figures 3, 4, and 5, the position of the center line X of the locking thread 20 varies along the helical length of the locking thread with respect to the center line Y of the root of the primary thread 19. More specifically, in Figure 3 the center line X is shown to the left of the center line Y. In Figure 4 the two center lines X and Y coincide. In Figure 5 the center line X is shown to the right of the center line Y. This waviness, undulation or irregularity in the pitch of the thread 20 is exaggerated in the drawings for purposes of illustration. At least a part of this variation is absorbed by elastic deformation of the material and the result is that the torque required to unscrew the threaded connection is considerably increased and the locking effect is thereby enhanced.

In the modied form of my invention shown in Figure 6 the locking thread 20a has a crest 21a which varies in diameter along the length of the thread 20a. Hills and valleys are thus produced in the thread 20, and these may be formed by a rolling tool (not shown). This form of undulation in radial dimensions of the locking thread may supplement the axial undulations in pitch, previously described, or may be used on a locking thread which is formed as a true helix. The effect of the non constant radius of lthe crest 21a of the locking thread 20a is the increase in the torque required to unscrew the thread connection, and the locking efect is thereby enhanced.

In the modied form of my invention shown in Figure 7, the locking thread 20b is provided on' the nut 10b while the bolt 15b is initially formed with a conventional thread 19h. When the nut 10b is screwed on the bolt 15b, the locking thread 20b develops an interfering engagement with the crests of the thread 19b. When the bolt 10b is screwed home against the shoulder 18b, axial distortion of the threads occurs to reduce clearances 31 on one side of the threads and to increase the clearances 32 on the other side. The locking thread 20b may be embodied in the nut 10b when the strength of the material of the nut is substantially the same as that of the bolt. In this case the locking thread 20b may be employed on either member as desired. 'Ihe other member may be of standard construction. On small parts, relief clearances similar to those shown at4 25 on Figures 1-3 may be employed if desired, to assist in thread-rolling operations. The locking thread 20b may have either axial distortion of pitch as shown in Figures 3, 4, and 5, or a change in radial dimensions as shown in Figure 6, or both.

It will be understood that the terms bolt and nut are used in a descriptive sense only and that the nut may constitute any member having an internal thread while the bolt may constitute any member having a mating external thread.

While the particular form of thread chosen to illustrate the invention has opposed flanks of equal angles, it will be understood that other forms of threads having opposing ilanlcs of unequal angles such as, for example, buttress threads, may be used with a secondary locking thread with equally good results.

Having fully described my invention, it is to be understood that I do not wish to be limited to the details herein set forth, but my invention is of the full scope of the appended claims.

I claim:

1. A member having a conventional truncated substantially 60 primary screw thread for carrying axial loads and a single integral, relatively small locking thread located at the root and interposed between the convolutions of the primary screw thread, the locking thread having a rounded convex crest and said member having a rounded concave tillet between the primary thread and locking thread on either side of said locking thread, the crest diameter of the locking thread being substantially greater than the normal conventional root diameter of its associated primary thread, the cross-sectional area of said c-king thread radially outwardly of said root diameter being not greater than the combined cross-sectional areas of the spaces formed by the fillets on either side of said locking thread and lying radially inwardly of said root diameter, the crest of the locking thread varying in position relative to the primary thread along the length of said primary thread.

2. A member as defined in claim 1 in which the crest of the locking thread is undulated radially along the length thereof.

3. A member as defined in claim 1 in which the crest of the locking thread is undulated axially along the length thereof.

4. A member as defined in claim 1 in which the crest of the locking thread is` undulated radially and axially along the length thereof.

5. A member as dened in claim 1, in which the depth of the primary screw thread is 3%. to 7 times the depth of the locking thread.

6. A member having a conventional, substantially primary screw thread for carrying axial loads and a single, integral, relatively small locking thread located at the root and interposed between the convolutions of the primary screw thread, the locking thread having a rounded convex crest and said member having a rounded concave fillet between the primary thread and locking thread on either side of said locking thread, the crest diameter of the locking thread being substantially greater than the normal conventional root diameter of its associated primary thread, the cross-sectional area of said locking thread radially outwardly of said root diameter being not greater than the combined cross-sectional areas of the spaces formed by the fillets on either side of said locking thread and lying radially inwardly of said root diameter, whereby when said member is threadedly engaged with a corresponding truncated but conventional thread on another member, the crest ofthe locking thread will press into the truncated crest of said corresponding conventional thread to distort and spread it laterally to form an interference fit therewith.

7. A member, as defined in claim 6, in which the primary Screw thread has anks that include portions adjacent the root thereof disposed substantially perpendicular to the axis of the primary thread and which merge with said fillets.

8. A member, as detined in claim 6, in which a second integral locking thread is formed on the truncated crest of the primary screw thread.

References Cited in the file of this patent UNlTED STATES PATENTS 720,580 Greenfield Feb. 17, 1903 1,300,801 Woodward Apr. 15, 1919 1,807,494 Proctor May 26, 1931 1,957,095 Cole May 1, 1934 2,109,778 Meersteiner Mar. l, 1938 2,177,003 Purtell Oct. 24, 1939 2,177,100 Frame Oct. 24, 1939 2,367,213 Harding Jan. 16, 1945 2,484,644 Poupitch Oct. 11, 1949 FOREIGN PATENTS 944,369 France Nov. 2, 1948 818,140 Germany Oct. 22, 1951

US325960A 1952-12-15 1952-12-15 Screw thread construction comprising conventional truncated threads with integral locking thread interposed therebetween Expired - Lifetime US2788046A (en)

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Cited By (58)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3247877A (en) * 1962-10-01 1966-04-26 Lock Thread Corp Screw
US3249142A (en) * 1963-07-18 1966-05-03 Res Eng & Mfg Lock screw
US3297213A (en) * 1965-04-07 1967-01-10 Henderson Edward Leak arresting closure
US3323402A (en) * 1965-10-08 1967-06-06 Standard Pressed Steel Co Thread forms
US3342234A (en) * 1966-02-09 1967-09-19 Lock Thread Corp Self-locking screw
US3385340A (en) * 1966-04-22 1968-05-28 Lock Thread Corp Lock fastener
US3394626A (en) * 1967-03-17 1968-07-30 Harold L. Oliver Machine screw threads
US3813718A (en) * 1973-05-24 1974-06-04 M Kamiya Method of manufacturing roll threaded screws having elasticity
US3901066A (en) * 1972-08-28 1975-08-26 Litton Industrial Products Dies for making self-locking screws
US3907017A (en) * 1974-09-30 1975-09-23 Glenn W Stanwick Interfering thread form
US4266590A (en) * 1979-04-09 1981-05-12 Microdot Inc. Prevailing torque nut
US4288189A (en) * 1979-08-10 1981-09-08 Yardley Products Corp. Threaded insert
US4576534A (en) * 1983-08-04 1986-03-18 Illinois Tool Works Inc. Thread form for soft material
US4594039A (en) * 1981-05-11 1986-06-10 Microdot Inc. Fastener
US4764067A (en) * 1985-11-22 1988-08-16 Jsm Screw Co., Ltd. Screw with groove for self-lock and method and rolling flat die for manufacturing the same
US5242252A (en) * 1990-02-09 1993-09-07 Haerle Anton Self-locking threaded connection
WO1994013965A1 (en) * 1992-12-14 1994-06-23 Monogram Aerospace Fasteners Fastener with thread lock
US6135689A (en) * 1997-05-27 2000-10-24 Aoyama Seisakusho Co., Ltd. Self-locking fastener
CN1065328C (en) * 1996-05-20 2001-05-02 欧阳明 Ideal limit thread and its making method
US6371709B1 (en) 1997-11-10 2002-04-16 Hanstock Fasteners Pty Limited Screws and threadforms
US6419435B1 (en) * 2000-07-11 2002-07-16 Paul Gaudron Wedging masonry anchor bolt and sleeve anchor for masonry bolt used in cinder blocks
US20050191150A1 (en) * 2002-03-15 2005-09-01 Charles Bickford Fixing device and method for fixing to a substrate
US20060012173A1 (en) * 2004-07-14 2006-01-19 Pinckney Robert Jr Resilient locking connection
US20060145477A1 (en) * 2004-12-30 2006-07-06 Reynolds Harris A Jr Threads with perturbations
US20070158943A1 (en) * 2004-12-30 2007-07-12 Hydril Company Lp Threaded connection with perturbed flanks
US20080036210A1 (en) * 2004-07-14 2008-02-14 Pinckney Robert Jr Locking connector with depressions
US7334975B2 (en) 2001-08-20 2008-02-26 Maclean-Fogg Company Fastener assembly
US7438512B2 (en) 2001-08-20 2008-10-21 Maclean-Fogg Company U-bolt assembly
US20090116929A1 (en) * 2007-11-02 2009-05-07 Shea David H Thread profile modification for controlled stiffness
USRE42207E1 (en) * 2000-09-19 2011-03-08 Asia Fastening (Us), Inc. Masonry anchor device
US20110137355A1 (en) * 2009-12-08 2011-06-09 Rinner James A Systematic Displacement Bone Screw
US8011866B2 (en) 2001-08-20 2011-09-06 Maclean-Fogg Company Locking fastener assembly
WO2012079569A3 (en) * 2010-11-26 2012-08-02 Ruia Global Fasteners Ag Self-locking screw
US20120232600A1 (en) * 2009-11-20 2012-09-13 Shanghai Microport Orthopedics Co., Ltd. Bone screw
US20130129448A1 (en) * 2011-11-22 2013-05-23 Gary Jack Reed Threaded fastener having a thread crest greater than its thread root and "V" angles on the crest and root
US20140033493A1 (en) * 2012-08-06 2014-02-06 GM Global Technology Operations LLC Semi-Circular Alignment Features of an Elastic Averaging Alignment System
US20150023761A1 (en) * 2013-07-19 2015-01-22 Conti Fasteners Ag High performance thread rolling screw/bolt for use in an unthreaded nut anchor
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US9681930B2 (en) 2014-12-15 2017-06-20 Jjgc Industria E Comercio De Materiais Dentarious S/A Implants for enhanced anchoring within bone
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US20180051737A1 (en) * 2016-08-18 2018-02-22 Research Engineering & Manufacturing Inc. High performance thread rolling and thread locking fastener
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Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US720580A (en) * 1902-04-14 1903-02-17 Edwin T Greenfield Screw-threaded pipe, tube, or rod.
US1300801A (en) * 1918-07-12 1919-04-15 Irving C Woodward Self-locking screw-thread.
US1807494A (en) * 1930-03-07 1931-05-26 George P Proctor Locking thread connection
US1957095A (en) * 1933-10-24 1934-05-01 Elwyn Z Cole Nut lock
US2109778A (en) * 1934-12-22 1938-03-01 Firm Bechert & Co Screw locking
US2177100A (en) * 1938-09-21 1939-10-24 Nat Supply Co Leak-resisting pipe thread
US2177003A (en) * 1937-10-09 1939-10-24 William A Purtell Self-locking screw
US2367213A (en) * 1943-03-26 1945-01-16 Crown Cork & Seal Co Self-locking threaded device
FR944369A (en) * 1946-03-01 1949-04-04 Improvements to the self-locking nuts
US2484644A (en) * 1945-04-13 1949-10-11 Illinois Tool Works Self-locking and sealing screw
DE818140C (en) * 1948-11-16 1951-10-22 Kurt Brunsch threadlocking

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US720580A (en) * 1902-04-14 1903-02-17 Edwin T Greenfield Screw-threaded pipe, tube, or rod.
US1300801A (en) * 1918-07-12 1919-04-15 Irving C Woodward Self-locking screw-thread.
US1807494A (en) * 1930-03-07 1931-05-26 George P Proctor Locking thread connection
US1957095A (en) * 1933-10-24 1934-05-01 Elwyn Z Cole Nut lock
US2109778A (en) * 1934-12-22 1938-03-01 Firm Bechert & Co Screw locking
US2177003A (en) * 1937-10-09 1939-10-24 William A Purtell Self-locking screw
US2177100A (en) * 1938-09-21 1939-10-24 Nat Supply Co Leak-resisting pipe thread
US2367213A (en) * 1943-03-26 1945-01-16 Crown Cork & Seal Co Self-locking threaded device
US2484644A (en) * 1945-04-13 1949-10-11 Illinois Tool Works Self-locking and sealing screw
FR944369A (en) * 1946-03-01 1949-04-04 Improvements to the self-locking nuts
DE818140C (en) * 1948-11-16 1951-10-22 Kurt Brunsch threadlocking

Cited By (79)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3247877A (en) * 1962-10-01 1966-04-26 Lock Thread Corp Screw
US3249142A (en) * 1963-07-18 1966-05-03 Res Eng & Mfg Lock screw
US3297213A (en) * 1965-04-07 1967-01-10 Henderson Edward Leak arresting closure
US3323402A (en) * 1965-10-08 1967-06-06 Standard Pressed Steel Co Thread forms
US3342234A (en) * 1966-02-09 1967-09-19 Lock Thread Corp Self-locking screw
US3385340A (en) * 1966-04-22 1968-05-28 Lock Thread Corp Lock fastener
US3394626A (en) * 1967-03-17 1968-07-30 Harold L. Oliver Machine screw threads
US3901066A (en) * 1972-08-28 1975-08-26 Litton Industrial Products Dies for making self-locking screws
US3813718A (en) * 1973-05-24 1974-06-04 M Kamiya Method of manufacturing roll threaded screws having elasticity
US3907017A (en) * 1974-09-30 1975-09-23 Glenn W Stanwick Interfering thread form
US4266590A (en) * 1979-04-09 1981-05-12 Microdot Inc. Prevailing torque nut
US4288189A (en) * 1979-08-10 1981-09-08 Yardley Products Corp. Threaded insert
US4594039A (en) * 1981-05-11 1986-06-10 Microdot Inc. Fastener
US4576534A (en) * 1983-08-04 1986-03-18 Illinois Tool Works Inc. Thread form for soft material
US4764067A (en) * 1985-11-22 1988-08-16 Jsm Screw Co., Ltd. Screw with groove for self-lock and method and rolling flat die for manufacturing the same
US5242252A (en) * 1990-02-09 1993-09-07 Haerle Anton Self-locking threaded connection
WO1994013965A1 (en) * 1992-12-14 1994-06-23 Monogram Aerospace Fasteners Fastener with thread lock
US5340253A (en) * 1992-12-14 1994-08-23 Monogram Aerospace Fasteners Fastener with thread lock
US5483810A (en) * 1992-12-14 1996-01-16 Monogram Aerospace Fasteners Die set for forming a fastener with thread lock
CN1065328C (en) * 1996-05-20 2001-05-02 欧阳明 Ideal limit thread and its making method
US6135689A (en) * 1997-05-27 2000-10-24 Aoyama Seisakusho Co., Ltd. Self-locking fastener
US6371709B1 (en) 1997-11-10 2002-04-16 Hanstock Fasteners Pty Limited Screws and threadforms
US6419435B1 (en) * 2000-07-11 2002-07-16 Paul Gaudron Wedging masonry anchor bolt and sleeve anchor for masonry bolt used in cinder blocks
USRE42207E1 (en) * 2000-09-19 2011-03-08 Asia Fastening (Us), Inc. Masonry anchor device
US7410337B2 (en) 2001-08-20 2008-08-12 The Maclean-Fogg Company Fastener assembly
US8011866B2 (en) 2001-08-20 2011-09-06 Maclean-Fogg Company Locking fastener assembly
US7438512B2 (en) 2001-08-20 2008-10-21 Maclean-Fogg Company U-bolt assembly
US7334975B2 (en) 2001-08-20 2008-02-26 Maclean-Fogg Company Fastener assembly
US20050191150A1 (en) * 2002-03-15 2005-09-01 Charles Bickford Fixing device and method for fixing to a substrate
US20080036210A1 (en) * 2004-07-14 2008-02-14 Pinckney Robert Jr Locking connector with depressions
US7793989B2 (en) 2004-07-14 2010-09-14 Pinckney Jr Robert Locking connector with depressions
US7506901B2 (en) * 2004-07-14 2009-03-24 Robert Pinckney Resilient locking connection
US20060012173A1 (en) * 2004-07-14 2006-01-19 Pinckney Robert Jr Resilient locking connection
US7458616B2 (en) * 2004-12-30 2008-12-02 Hydril Company Threads with perturbations
US8668233B2 (en) 2004-12-30 2014-03-11 Hydril Company Threaded connection with perturbed flanks
US7942454B2 (en) * 2004-12-30 2011-05-17 Hydril Company Threads with perturbations
US20070158943A1 (en) * 2004-12-30 2007-07-12 Hydril Company Lp Threaded connection with perturbed flanks
US20060145477A1 (en) * 2004-12-30 2006-07-06 Reynolds Harris A Jr Threads with perturbations
US20100156099A1 (en) * 2004-12-30 2010-06-24 Hydril Company Threads with perturbations
US20090116929A1 (en) * 2007-11-02 2009-05-07 Shea David H Thread profile modification for controlled stiffness
US7731466B2 (en) * 2007-11-02 2010-06-08 Gm Global Technology Operations, Inc. Thread profile modification for controlled stiffness
US20170135788A1 (en) * 2009-06-22 2017-05-18 Rtg Scientific Inc. Dental implant with interlocking and centering threads
US10441385B2 (en) * 2009-06-22 2019-10-15 Rtg Scientific, Llc Dental implant with interlocking and centering threads
US20120232600A1 (en) * 2009-11-20 2012-09-13 Shanghai Microport Orthopedics Co., Ltd. Bone screw
US9011506B2 (en) * 2009-11-20 2015-04-21 Shanghai Microport Orthopedics Co., Ltd. Bone screw
US8419779B2 (en) 2009-12-08 2013-04-16 James A. Rinner Systematic displacement bone screw
US20110137355A1 (en) * 2009-12-08 2011-06-09 Rinner James A Systematic Displacement Bone Screw
US9812684B2 (en) 2010-11-09 2017-11-07 GM Global Technology Operations LLC Using elastic averaging for alignment of battery stack, fuel cell stack, or other vehicle assembly
WO2012079569A3 (en) * 2010-11-26 2012-08-02 Ruia Global Fasteners Ag Self-locking screw
US8905694B2 (en) 2010-11-26 2014-12-09 Ruia Global Fasteners Ag Self-locking screw
US10066656B2 (en) * 2011-11-22 2018-09-04 Lock-N-Stitch, Inc. Threaded fastener having a thread crest greater than its thread root and “V” angles on the crest and root
US20130129448A1 (en) * 2011-11-22 2013-05-23 Gary Jack Reed Threaded fastener having a thread crest greater than its thread root and "V" angles on the crest and root
US20140033493A1 (en) * 2012-08-06 2014-02-06 GM Global Technology Operations LLC Semi-Circular Alignment Features of an Elastic Averaging Alignment System
US9618026B2 (en) * 2012-08-06 2017-04-11 GM Global Technology Operations LLC Semi-circular alignment features of an elastic averaging alignment system
US9404524B2 (en) * 2013-07-19 2016-08-02 Conti Fasteners High performance thread rolling screw/bolt for use in an unthreaded nut anchor
US20150023761A1 (en) * 2013-07-19 2015-01-22 Conti Fasteners Ag High performance thread rolling screw/bolt for use in an unthreaded nut anchor
US9863454B2 (en) 2013-08-07 2018-01-09 GM Global Technology Operations LLC Alignment system for providing precise alignment and retention of components of a sealable compartment
US9458876B2 (en) 2013-08-28 2016-10-04 GM Global Technology Operations LLC Elastically deformable alignment fastener and system
US9463831B2 (en) 2013-09-09 2016-10-11 GM Global Technology Operations LLC Elastic tube alignment and fastening system for providing precise alignment and fastening of components
US9457845B2 (en) 2013-10-02 2016-10-04 GM Global Technology Operations LLC Lobular elastic tube alignment and retention system for providing precise alignment of components
US9511802B2 (en) 2013-10-03 2016-12-06 GM Global Technology Operations LLC Elastically averaged alignment systems and methods
US9669774B2 (en) 2013-10-11 2017-06-06 GM Global Technology Operations LLC Reconfigurable vehicle interior assembly
US9481317B2 (en) 2013-11-15 2016-11-01 GM Global Technology Operations LLC Elastically deformable clip and method
US9447806B2 (en) 2013-12-12 2016-09-20 GM Global Technology Operations LLC Self-retaining alignment system for providing precise alignment and retention of components
US9428123B2 (en) 2013-12-12 2016-08-30 GM Global Technology Operations LLC Alignment and retention system for a flexible assembly
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US9446722B2 (en) 2013-12-19 2016-09-20 GM Global Technology Operations LLC Elastic averaging alignment member
US9541113B2 (en) 2014-01-09 2017-01-10 GM Global Technology Operations LLC Elastically averaged alignment systems and methods
US9428046B2 (en) 2014-04-02 2016-08-30 GM Global Technology Operations LLC Alignment and retention system for laterally slideably engageable mating components
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USD837378S1 (en) 2014-12-15 2019-01-01 Jjgc Industria E Comercio De Materiais Dentarios S/A Bone implant
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