Search Images Maps Play YouTube News Gmail Drive More »
Sign in
Screen reader users: click this link for accessible mode. Accessible mode has the same essential features but works better with your reader.

Patents

  1. Advanced Patent Search
Publication numberUS1980093 A
Publication typeGrant
Publication dateNov 6, 1934
Filing dateMay 13, 1925
Priority dateJan 16, 1925
Publication numberUS 1980093 A, US 1980093A, US-A-1980093, US1980093 A, US1980093A
InventorsRosenberg Heyman
Original AssigneeRosenberg Heyman
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Anchorage device
US 1980093 A
Abstract  available in
Images(1)
Previous page
Next page
Claims  available in
Description  (OCR text may contain errors)

Patented Nov. 6, 1934 1,980,093 ANCHORAGE DEVICE Heyman Rosenberg, New York, N. Y.

Original application January 16, 1925, Serial No. 2,874. Divided and this application May 13,

1925, Serial No. 30,008

2 Claims.

This invention relates to improvements in the art of anchorage and in anchorage devices of the type especially adapted for use in metal and other hard substances and materials susceptible of be- 5 ing flowed while cold. This application is a division of my parent application Serial No. 2,874, led January 16, 1925.

An object in view is the causing of the flow of the material of work by successive steps into ay l compact, high-frictional relation to the engaging parts of an anchorage device for insuring rm anchorage incident to the application of relatively small stresses.

A further object in view is the effecting of an l anchorage with a minimum amount of stress and `with maximum eiiiciency.

With these and further objects in view as will in part hereinafter become apparent and in part be stated, the invention comprises certain novel steps and combination of steps in the art of anchorage, and also comprises certain novel constructions combinations and arrangements of parts as subsequently specified and claimed.

In the accompanying drawing,-

Figure 1 is, a view in side elevation of an anchorage device especially Well adapted for the practicing of the improved art, and embodying the features of the structural part of the present invention, the structure being shown in engagement with work, and the work being seen in vertical section, the parts being shown on a magniiied scale beyond that of the average commercial device. Figure 2 is a horizontal section taken on the plane indicated by lines 2-2 of Figure l, and

looking along the screw toward the head.

Figure 3 is a view similar to Figure 1 of the parts with the anchorage device only partway through the work, the upper portion of the anchorage device being omitted.

Figure 4 is a sectional view through the work after the anchorage device has been fully seated and subsequently removed.

Figure 5 is a. view similar to Figure 1 dfn slightly modied embodiment, the work being omitted and fragments of the anchorage device being broken away. y

Referring to the drawing by numerals, 1 indicates the body of an anchorage device which is preferably cylindrical and provided at its entering end with a smooth or pilot portion 2 of greater diameter than the diameter of the main portion of the body, the body terminating in a point or entering. cone 3. At the opposite end, the body 1 is preferably provided with an appropriate head 4, such as that of the ordinary screw, having the kerf 5 for receiving a rotating instrument. The body 1 is provided with a ribl made up of a section 6 and a section 7, each of said sections being preferably of a length approximately equal to the thickness or depth of the work 8, or at least equal to the distance throughout which the anchorage device is to engage the work when in its seated position. The 'rib making up the sections 6 and 7 in the embodiment shown in Figure 1 is arranged on a thread spiral corresponding with that of an ordinary wood screw thread and extends from the pilot 2 to the head 4. The rib is hardened in the sense in which the term hardened is employed in the metallurgical art to distinguish from soft metals, which is to say that the thread or rib making up the sections 6 and 7 is hardened suilciently for entering metal, such as soft iron or soft steel, substantially without injury to the thread. The method of hardening the thread or rib making up the sections 6 and 'l is susceptible of a wide range of variation, but for ordinary commercial purposes the hardened condition is preferably attained by subjecting the whole anchorage device to a case-hardening process, such as the well known cyanide process. The hardening of the other parts `of the 'structure beside the thread is an incident to such process, and While adding little, if any, value to the completed structure in no sense detracts therefrom and aiords an inexpensive means of producing a hardened thread.

As will be clear from the dotted showing at the intermediate portion of the anchorage device, as seen in Figure 1, the sections 6 and 7 are alined, and, in fact, continuous of each other, the thread or rib of section 6 tapering into the thread or rib of section 7, it being apparent from Figure 1 that the thread or rib of section 'l outstands from the body 1 a less distance than the thread or rib making up section 6. In other words, the rib for section 'l is smaller and of less dimensions in every direction except length and spacing between helices than is the thread or rib making up section 6. ,The thread or rib making `up sections 6 and 7 is a continuous spiral of uniform and substantially low pitch. The dimensions of therib or thread making up section '7 are the same, that is, uniform, throughout the length of the section, and similarly the thread or rib making up section 6 has its dimensions the same, that is, uniform, throughout the length of the section, and variation in dimensions occurs only at the point of junction of the '110 only sufliciently larger to allow passage of the4 pilot therethrough with a snug t. lli'he anchorage device is applied by the introduction of the point 3 into the opening 9, the taper of the point facilitating and assisting in centering the anchorage device and bringing the pilot 2 intoaxial alinement with the opening 9. The pilot is then passed into the opening with a longitudi- :nal thrust of the anchorage device until the entering end of the rib or thread of section 'lI engages the upper part of the work 8. The anchorage device is then revolved while preferably subjected to stress in the direction of its length toward the work 8, as, for instance, by having `the kerf 5 engaged by a screw-driver and the anchorage device revolved thereby. Thethread of section '7 begins to enter the metal of work 8, severing the same and forming a passageway therein similar to internal threads, and the revolving operation continues until the pilot 2 has passed through the work 8. course, that as soon as the thread has sufficiently entered the work, the longitudinal stress may be no longer required. It will be observed from the showing in Figures 1 and 3 that during the Asteps of the operation thus far described, the ithread or rib making up section 7 will have caused the metal of work 8 to flow to a position overhanging the annular shoulder at the upper end of the pilot 2 resulting from the fact that the pilot 2 is larger in diameter than that of the body 1. The owing of the metal of work 8 thus effected causes it to enter the valleys bee tween the helices of the rib and to frictionally engage the faces of the rib. Nevertheless, since .the rib or thread making up 'section 7 is of rela- ,tively shallow depth, the twisting stress neces sary for forcing the anchorage device into the .Work 8 is comparatively small.

When the anchorage device has reached the position with the pilot 2 extending beyond the work 8, the thread or rib will have reached that point at the upper surface of the work 8 where it tapers from the enlarged rib of section 6. However, as the internal thread produced by section '7 is completed before section 6 begins to enter, continued rotation of the anchorage device will cause section 6 to enter the Work with very little, if any, additional force or torsional stress required than that required for the introduction of section 7. Continued revolution of the anchorage device causes the thread or rib of section 6 to enter the material 8 and to proportionally increase the internal threads being formed therein until they assume the proportions indicated in Figure 4, the metal entered by the larger rib or thread being caused to ilow thereby to a greater extent toward the body 1 than was effected by the action of the smaller section of thread or rib until the material of the work.8 extends in toward the body 1, as indicated at 10, 10, in Figure 4, a distance occupying substantially all of the space represented by the It is obvious, of,`

difference in diameter of the opening 9 and the body 1, whereby the material of work 8 is caused to practically ll the valleys between the helices of section 6 and to proportionally increase frictional resistance to removal of the anchorage device. The anchorage device can, of course, after reaching the final seated position with the section 6 extending throughout the thickness of the work 8 be backed olf by a reverse or withdrawing rotation, but such rotation will be highly resisted by the friction effected by the flowed metal at 10, 10.

It will thus be seen that -in a very simple manner the anchorage is caused to assume a relation to the work without the exercise of any great amount of stress which it will maintain under all ordinary operating conditions.

In Figure 5 is illustrated a very slight modified l embodiment in which the body 21 is provided with a low-pitched thread or rib forming sections 26 and 27,.the rib for the section 26 being of greater dimensions than the rib for section 2'7 land tapering into the latter after the manner of the taper of the rib or thread making up section 6 into the rib or thread making up section 7. But, in the embodiment seen in Figureg, the body 21 is itself tapered at the place of tapering of the thread, producing a reduced portion 22 which causes the thread of section 27 to have approximately the same relation to that part of the body which it engages as has the thread of section 26 to its part of body 21. Where ay pilot is employed, the pilot willbe of a diameter bearing that relation to the body 21, or larger diameter of the body of the anchorage device, which pilot 2 bears to body 1. The operation of the structure seen in Figure 5 is the same as that described with'respect to the structure seen in Figure 1, except that in instances where metal may be caused to ow by the rib or thread 27 far enough to underhang the larger portion of the body, such flowed material is compressed by the body on reaching and passing the point of such flowed material, and an increased frictional engagement is thus effected.

Because of the difficulty of accurately illus trating so small a structure as the average commercial anchorage device, a magnified scalehas been utilized throughout the drawings, and yet, for the purpose of enabling those skilled in the art to understand that the proportions have been as nearly as practically maintained in these mag nied showings, it may be stated that an acceptable embodiment will have an overall longitudinal measurement of one inch; a diameter for the pilot 2 of one hundred thirty-two thousandths of an inch; and the body 1 one hundred eighteen thousandths of an inch. A. circle capable'of contacting at diametrically opposite points with projected diametrically opposite points of the edge of a helix of rib or thread 7, that is, such a circle as seen in Figure 2 representing said helix, in a structure of the size just mentioned should measure in diameter one hundred forty-six thousandths of an inch, and a corresponding circle for a helix of rib or thread 6 should' have a diameter of one hundred seventy-four thousandths of an inch. In other words, an anchorage device having an overall length of one inch should have a pilot one hundred thirty-two thousandths of an inch in diameter, a body 1 one hundred eighteen thousandths of an inch in diameten' a thread or rib.'7 outstanding from the body at any one point a maximum of fourteen thousandthsof an inch, and a thread or rib 6.out-

standing from the body at one point a maximum of twenty-eight thousandths of an inch.

Obviously, a wide range of variation from these measurements is clearly within the spirit, intent and scope of the invention, but the foregoing will give definite data for indicating the preferable lrelative proportions, and it should be noted that while only two sections, 7 and 6, have been illustrated, a number of such sections successively tapering into each other may be utilized for increasing the diameter or diametrical space occupied by the final engaging rib or ribs without substantially increasing the difficulty or stress necessary for locating the anchorage device in its final position.

It should also be apparent that in the practicing of the art embodying the present invention the material of the work is severed in a spiral path and caused to flow in an encircling mass toward the body of the anchorage device, and then, While the anchorage device continues to move, the flow is interrupted; and subsequently the encircling mass is further flowed toward the bOdy.

body and a single continuous thread of constant pitch outstanding therefrom hardened suii'lciently for entering metal, such as soft iron or soft steel, substantially without injury to the thread, said thread comprising' alined and joined sections of geometrically similar cross-section, each section outstanding from the body a constant distance and being of substantially uniform cross section within its own limits throughout its length, the section adjacent the entering end of the body outstanding a less distance than the HEYMAN RosENBERG.

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2419555 *Apr 19, 1940Apr 29, 1947Charles D FatorSelf-threading and locking screw
US3156152 *Sep 8, 1961Nov 10, 1964Reed & Prince Mfg CompanySelf-tapping driving screw fastener
US3172170 *Sep 18, 1961Mar 9, 1965D B Frampton & CompanyComposite wood panel
US3661046 *Nov 9, 1970May 9, 1972Illinois Tool WorksCombination screw
US3703843 *Jan 4, 1971Nov 28, 1972Msl Ind IncFastener with improved thread construction
US3726180 *Jul 26, 1972Apr 10, 1973Rosan JInsert with chip entrapment means
US3861269 *Nov 13, 1972Jan 21, 1975Superior Dry Wall Screw Mfg CoFastener with improved thread construction
US4845818 *Jan 15, 1988Jul 11, 1989Perry Oliver LDevice for changing fuel pump on internal combustion engine
US5061136 *Oct 3, 1990Oct 29, 1991Emhart Inc.Masonry screw anchor
US5120171 *Nov 27, 1990Jun 9, 1992Stuart SurgicalBone screw with improved threads
US5226766 *May 21, 1992Jul 13, 1993Stuart SurgicalBone screw with improved threads
US5417533 *Jul 13, 1990May 23, 1995National Medical Specialty, Inc.Bone screw with improved threads
US5492442 *Feb 24, 1994Feb 20, 1996National Medical Specialty, Inc.Bone screw with improved threads
US5863167 *Aug 12, 1996Jan 26, 1999Max Co.,LtdDrilling screw for fixing gypsum board to thin steel plate
US5871486 *Jan 10, 1997Feb 16, 1999Acumed, Inc.Variable pitch bone screw
US5882162 *Nov 28, 1997Mar 16, 1999Max Co., Ltd.Driving screw
US5964768 *Mar 3, 1998Oct 12, 1999Acumed, Inc.Tapered bone screw with continuously varying pitch
US5991998 *Oct 8, 1998Nov 30, 1999Max Co., Ltd.Drilling screw and execution method for fixing gypsum board to thin steel plate
US6030162 *Dec 18, 1998Feb 29, 2000Acumed, Inc.Axial tension screw
US6212750 *Aug 1, 1996Apr 10, 2001Gary Jack ReedMethod of repairing cracks
US6299615Aug 16, 1999Oct 9, 2001Acumed, Inc.System for fusing joints
US6468277Apr 4, 2000Oct 22, 2002Ethicon, Inc.Orthopedic screw and method
US6527777Mar 13, 2001Mar 4, 2003Ethicon, Inc.Device for repairing a soft-tissue tear and method
US6666638 *Feb 15, 2001Dec 23, 2003Phillips Screw CompanyDeck screw having multiple threaded sections
US6725518Mar 26, 2001Apr 27, 2004Gary Jack ReedCasting repair method
US6941635Oct 16, 2003Sep 13, 2005Phillips Screw CompanyScrew for remnant-producing alternative lumber material
US6984235Jun 3, 2002Jan 10, 2006Acumed LlcSystem for fusing joints
US6989014Jul 25, 2002Jan 24, 2006Ethicon, Inc.Orthopedic screw and method
US7189045Apr 21, 2004Mar 13, 2007Omg, Inc.Deck screws suitable for use with composite lumber
US7235079Nov 18, 2004Jun 26, 2007Acumed LlcComposite bone fasteners
US7255523Dec 22, 2005Aug 14, 2007Prime Source Building Products, Inc.Dual threaded screw for composite materials
US7303562 *Dec 22, 2000Dec 4, 2007Sdgi Holdings, Inc.Pedicle screws with inclined channels to hold support rods
US7367768Feb 16, 2007May 6, 2008Omg, Inc.Deck screw and installation method for composite lumber
US7578836Jan 24, 2006Aug 25, 2009Depuy MitekOrthopedic screw and method
US7695228Aug 2, 2005Apr 13, 2010Phillips Fastener, LlcScrew
US7798755 *Apr 19, 2006Sep 21, 2010Erwin TommThreaded connector with interlock
US7799062 *Nov 30, 2004Sep 21, 2010Stryker Trauma S.A.Self-guiding threaded fastener
US8070786Jan 9, 2006Dec 6, 2011Acumed LlcSystem for fusing joints
US8419332Oct 20, 2008Apr 16, 2013Atlas Bolt & Screw Company LlcNon-dimpling fastener
US8419779Dec 8, 2009Apr 16, 2013James A. RinnerSystematic displacement bone screw
US8430618Dec 5, 2011Apr 30, 2013Abbott-Interfast CorporationFasteners for composite material
US8696281Sep 20, 2010Apr 15, 2014Erwin TommThreaded connector with interlock
USRE34969 *Aug 27, 1993Jun 13, 1995Emhart Inc.Masonry screw anchor
USRE42207 *Aug 18, 2005Mar 8, 2011Asia Fastening (Us), Inc.Masonry anchor device
EP1382865A1 *Jul 11, 2003Jan 21, 2004Bosch Automotive Systems CorporationSelf-tapping screw type fastener and push rod for brake booster using the same
WO1998018581A1 *Oct 25, 1996May 7, 1998Laue Charles EMethod of locking a screw threaded joint
Classifications
U.S. Classification411/412
International ClassificationF16B25/00
Cooperative ClassificationF16B25/0068, F16B25/00, F16B25/0057, F16B25/0021
European ClassificationF16B25/00G1D, F16B25/00G1C, F16B25/00C2, F16B25/00