[go: up one dir, main page]

USRE28111E - Fastener with improved thread construction - Google Patents

Fastener with improved thread construction Download PDF

Info

Publication number
USRE28111E
USRE28111E US28111DE USRE28111E US RE28111 E USRE28111 E US RE28111E US 28111D E US28111D E US 28111DE US RE28111 E USRE28111 E US RE28111E
Authority
US
United States
Prior art keywords
thread
shank
threads
screw
major diameter
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
Application number
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed filed Critical
Application granted granted Critical
Publication of USRE28111E publication Critical patent/USRE28111E/en
Expired legal-status Critical Current

Links

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
    • 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
    • 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
    • F16B25/0031—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 screw being designed to be screwed into different materials, e.g. a layered structure or through metallic and wooden parts
    • 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
    • F16B25/0068—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 with multiple-threads, e.g. a double thread screws

Definitions

  • ABSTRACT OF THE DISCLOSURE A fastener having a shank divided into rst and second portions respectively located adjacent a head end and a tapered pointed end with the rst portion having a single thread formed thereon of uniform pitch.
  • a multiple of parallel threads of similar uniform pitch are formed on the second portion of the shank and one of the threads on the second portion is a continuation of the thread on the rst portion. All of the threads have a substantially uniform minor diameter while the major diameter of the upper single thread portion is greater than the major diameter of the lower multiple thread portion.
  • the present invention relates generally to threaded fasteners and more particularly to an improved fastener for use with materials, such as particle board.
  • the substitute materials for the heretofore known types of building materials have found a remarkable degree of commercial success, diculties have been encountered in providing a secure connection between the above mentioned materials and supporting structure.
  • the Gypsum board, particle board, masonite, etc. are secured to a supporting structure, such as a wood or metal base, by the use of self-tapping screws that form their own openings.
  • the present invention contemplates a self-tapping screw which is capable of forming its own opening and produces easy initial entry and greater holding power after the screw has been fully inserted into the structure.
  • the screw has a first multiple thread portion which accommodates easy initial entry into a work-piece and partially forms threads in the more dense material. Thereafter, a second portion of the screw enlarges one of the multiple threads in the workpiece while the multiple thread portions provide easy entry into the supporting structure. All of the above is accomplished by a simple and inexpensive screw which can easily be deformed by utilizing conventional roll thread dies to deform a circular shank of uniform diameter.
  • the fastener element of the present invention includes a shank having a head upon end and a tapered point on the opposite end and the shank divided into first and second portions respectively located adjacent the opposite ends.
  • a continuous thread of uniform pitch is produced on the shank and extends between the opposite ends and omo the tapered point.
  • At least one additional parallel thread of similar uniform pitch is formed on the second portion of the shank to produce multiple parallel threads along the lower portion of the shank and a single thread along the upper portion of the shank, that is a continuation of one of the multiple parallel threads.
  • All of the threads on both portions of the shank have a substantially uniform minor diameter while the single continuous thread on the upper portion has a larger major diameter than the major diameter of the lower twin threaded portion.
  • the lower portion of multiple threaded portion initially forms a multiple thread in an opening which is produced by the screw as it enters the workpiece, such as a particle board. Thereafter, the single threaded portion, which has a thread formed as a continuation of one of the multiple threads on the lower portion, increases the major diameter of one of the multiple threads since it has a greater major diameter.
  • the single threaded portion has considerably more spacing between adjacent thread portions thereby requiring less deformation of the particle board.
  • increased holding power will result from such a thread construction.
  • the multiple thread portion utilizes a twin parallel thread while an alternate embodiment utilizes a triple parallel thread on the lower portion of the screw.
  • the single thread on the upper portion of the screw is a continuation of one of the lower threads.
  • FIG. 1 is a side elevation of a screw constructed in accordance with the present teachings
  • FIG. 2 is a fragmentary sectional view showing the screw retaining a workpiece on a supporting structure
  • FIG. 3 is a fragmentary side elevation similar to FIG. 1 showing a slightly modified form of the invention.
  • FIG. 1 shows a screw 10 having an enlarged head 12 on one end of a shank 14 and a tapered point 16 adjacent the opposite end of the shank.
  • the shank 14 is threaded in accordance with the teachings of the present invention and includes a continuous thread 20 extending between the head end 12 and the tapered pointed end 16.
  • the thread 20 has a first portion 20a on the upper end of the screw adjacent the head 12 and a second portion 2Gb adjacent the tapered point or second portion of the shank.
  • each portion 20a and 20h respectively defined on the first and second portions of the shank 14 have a common substantially uniform minor diameter a, except for the part of thread portion Zib which is on the tapered point 16, while the first or upper thread portion 20a has a greater major diameter c than the major diameter b of the second or lower thread portion 20h. Also, each portion has a plurality of thread convolutions as is shown in FIG. l.
  • the lower or second portion of the shank 14 of the screw 10 has a second parallel thread 22 that has a similar uniform pitch and is located between or intermediate the continuous thread portion 20h.
  • the two threads 20b and 22 cooperate to define parallel twin threads along the lower or second portion of the shank and the thread portion 20a defines a single thread along the upper or first portion of the shank that is a continuation of one of the double or twin parallel threads.
  • the screw 10 of the present invention is formed by utilizing a blank having a uniform diameter which is deformed by rolling to produce the finished screw. Since the same amount of metal is deformed along the entire length of the shank and the minor diameter of the [thread] threads, except at the point I6, is substantially uniform along the length of the shank, the major diameter of the single threaded portion is larger than the major diameter of the double or multiple threaded portion adjacent the pointed end.
  • the double thread portion When inserting the screw through a workpiece, such as a particle board or Gypsum board, and attaching the workpiece to a support, such as a metal stud, the double thread portion provides easy entry into the material to form the hole and the double or multiple thread portion allows the screw to be inserted with a minimum amount of torque being applied thereto. As the double threaded portion is inserted past the upper surface of the workpiece, the single threaded portion enlarges the major diameter of one of the multiple threads formed in the workpiece while the thread portion begins its travel into the support to produce a multiple threaded opening in the support.
  • the larger pitch or wider spacing between respective turns of the thread on the upper portion having a larger major diameter results in a deepening of one of the double threads in the workpiece to further compact the interior of the workpiece and the substantial increment between the major and minor diameters of the thread produces considerably greater holding power after the screw is in its fully inserted position, shown in FIG. 2. Since only one of the double threads initially formed in the workpiece iS enlarged, the higher degree of holding power is achieved without removing or disintegrating the material between respective helixes of the upper thread.
  • the present invention provides a simple and efficient manner for increasing the holding power of a screw, particularly used for connecting a workpiece to a support and wherein the workpiece and the support are formed of different materials.
  • the double threaded portion on the lower end of the screw provides for easy, rapid screw entry through the Gypsum board and the metal stud, While the upper single threaded portion attains a higher degree of holding power without disintegrating the material adjacent the opening.
  • FIG. 3 A slightly modified form of the present invention is shown in FIG. 3, in which a shank having a head (not shown) on one end thereof and a pointed tip 32 on tbe opposite end thereof, is provided with a single threaded portion 32 along the upper portion of the screw and a triple threaded portion 34 along the lower portion of the screw with one of the triple threads being a continuation of the single thread along the upper portion.
  • the major diameter of the single thread along the upper portion of the shank is greater than the major diameter along the lower multiple thread defined on the lower portion of the shank while the minor diameters of the two threads are the same.
  • the threads are again produced by rolling a uniform, diameter shank and the increment between the major diameters b and c, is larger than the increment between these diameters in the FIG. l embodiment.
  • any multiple of threads could be used for the lower portion of the screw so long as one of the parallel threads continues into the upper portion and has a larger major diameter along the upper portion of the shank.
  • head 12 has been shown as being of the hat type, having a kerf 40 for receiving a driving element, such as a screwdriver, various heads, such as the oval head, round head, pan head and Fillister head could be substituted without departing the spirit of the invention.
  • the screw need not necessarily have a tapered point adjacent the opposite end thereof. However, in its specific embodiment, the screw is preferably of the tapered point type with the thread extending down to the point so that the screw will form its own hole and need not have a pre-drilled hole formed in the workpiece and/or the support.
  • a fastening element including a shank with a head on one end and a tapered point on the opposite end, said shank being divided into first and second portions', a continuous thread of uniform pitch on said shank extending substantially between said ends with said portions each having a plurality of thread convolutions; and at least one additional parallel thread of similar uniform pitch intermediate said continuous thread only on said second portion of said shank, said threads having a common minor diameter throughout the length of both portions, said continuous thread having a major diameter on said rst portion which is greater than the major diameter of said threads on said second portion, and the major diameters of said threads on said second portion being substantially uniform.
  • a fastener element as defined in claim l in which said second portion has a double thread and said first portion has a single thread.
  • a fastener as defined in claim l in which said second portion has a triple thread and said first portion has a single thread.
  • a fastener element as defined in claim l in which said second portion is located adjacent said tapered point and said rst portion is located adjacent said head.
  • a fastener element as dened in claim 4 a thread on said shank extending onto said tapered point.
  • a fastener element as defined in claim I a thread 0n said shank extending onto said tapered point.
  • a fastening element including a shank with a head on one end and a tapered point on the opposite end, said shank being divided into rst and second portions; a continuous thread 0f uniform pitch on .mid shank extending substantially between said ends with .raid portions each having a plurality of thread convolntions; and at least one additional parallel thread of similar uniform pitch intermediate said continuons thread only on said second portion of said shank, said continuous thread haring (t major diameter on said first portion which is greater than the maior diameter of said threads on .raid second p0rtion, and the major diameters of said threads on said second portion being substantially uinform.
  • a fastener element as defined in claim 7, a thread UNITED STATES PATENTS 0n said shank extending Onto Said ldpered pOn. Rm 3,941 4/1870 Piel-cc s5 46 9.
  • a fastener as in Claim 7, Said fhredds having Ihtr 403,531 8,1839 Rogers 85 46 minor diameter on Ihe said shank. 438,7 54 10/1390 Rogers 85 46 R f C.' d 5 1,809,758 6/1931 Rosenberg 85-46 X e me e 1,980,093 11/1934 Rosenberg zas-46 The following references, cited by the Examiner, are

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Geometry (AREA)
  • Connection Of Plates (AREA)

Abstract

A FASTENER HAVING A SHANK DIVIDED INTO FIRST AND SECOND PORTIONS RESPECTIVELY LOCATED ADJACENT A HEAD END AND A TAPERED POINTED END WITH THE FIRST PORTION HAVING A SINGLE THREAD FORMED THEREON OF UNIFORM PITCH. A MULTIPLE OF PARALLEL THREADS OF SIMILAR UNIFORM PITCH ARE FORMED ON THE SECOND PORTION OF THE SHANK AND ONE OF THE THREADS ON THE SECOND PORTION IS A CONTINUATION OF THE THREAD ON THE FIRST PORTION. ALL OF THE THREADS HAVE A SUBSTANTIALLY UNIFORM MINOR DIAMETER WHILE THE MAJOR DIAMETER OF THE UPPER SINGLE THREAD PORTION IS GREATER THAN THE MAJOR DIAMETER OF THE LOWER MULTIPLE THREAD PORTION.

Description

Re. 28,11 l
All2- 13 1974 R. c. LAVERTY Original Filed Jan. c, 1971 United States Patent Olce Re. 28,1 1l Reissued Aug. 13, 1974 Matter enclosed in heavy brackets appears in the original patent but forms no part of this reissue specification; matter printed in italics indicates the additions made by reissue.
ABSTRACT OF THE DISCLOSURE A fastener having a shank divided into rst and second portions respectively located adjacent a head end and a tapered pointed end with the rst portion having a single thread formed thereon of uniform pitch. A multiple of parallel threads of similar uniform pitch are formed on the second portion of the shank and one of the threads on the second portion is a continuation of the thread on the rst portion. All of the threads have a substantially uniform minor diameter while the major diameter of the upper single thread portion is greater than the major diameter of the lower multiple thread portion.
BACKGROUND OF THE INVENTION The present invention relates generally to threaded fasteners and more particularly to an improved fastener for use with materials, such as particle board.
In recent years, the increased cost in natural wood, plaster and various other building materials heretofore utilized has required the construction industry to look to other types of materials to reduce the cost of buildings. Thus, the use of dry wall Gypsum board in place of the conventional plaster in buildings has been rather extensive. In addition, particle board, masonite, etc., are being used as building materials.
While the substitute materials for the heretofore known types of building materials have found a remarkable degree of commercial success, diculties have been encountered in providing a secure connection between the above mentioned materials and supporting structure. In various uses, the Gypsum board, particle board, masonite, etc. are secured to a supporting structure, such as a wood or metal base, by the use of self-tapping screws that form their own openings.
Because of the tendency for the above mentioned materials to disintegrate under the pressure of the screw threads, difficulties have been encountered in obtaining the necessary holding power between such materials and supporting structure, such as metal.
SUMMARY OF THE INVENTION The present invention contemplates a self-tapping screw which is capable of forming its own opening and produces easy initial entry and greater holding power after the screw has been fully inserted into the structure. The screw has a first multiple thread portion which accommodates easy initial entry into a work-piece and partially forms threads in the more dense material. Thereafter, a second portion of the screw enlarges one of the multiple threads in the workpiece while the multiple thread portions provide easy entry into the supporting structure. All of the above is accomplished by a simple and inexpensive screw which can easily be deformed by utilizing conventional roll thread dies to deform a circular shank of uniform diameter.
The fastener element of the present invention includes a shank having a head upon end and a tapered point on the opposite end and the shank divided into first and second portions respectively located adjacent the opposite ends. A continuous thread of uniform pitch is produced on the shank and extends between the opposite ends and omo the tapered point. At least one additional parallel thread of similar uniform pitch is formed on the second portion of the shank to produce multiple parallel threads along the lower portion of the shank and a single thread along the upper portion of the shank, that is a continuation of one of the multiple parallel threads.
All of the threads on both portions of the shank have a substantially uniform minor diameter while the single continuous thread on the upper portion has a larger major diameter than the major diameter of the lower twin threaded portion.
With this arrangement, the lower portion of multiple threaded portion initially forms a multiple thread in an opening which is produced by the screw as it enters the workpiece, such as a particle board. Thereafter, the single threaded portion, which has a thread formed as a continuation of one of the multiple threads on the lower portion, increases the major diameter of one of the multiple threads since it has a greater major diameter.
The single threaded portion has considerably more spacing between adjacent thread portions thereby requiring less deformation of the particle board. However, because of the larger major diameter of the thread in the upper portion and the common minor diameter of all of the threads on the shank, increased holding power will result from such a thread construction.
In one specific embodiment, the multiple thread portion utilizes a twin parallel thread while an alternate embodiment utilizes a triple parallel thread on the lower portion of the screw. In each embodiment, the single thread on the upper portion of the screw is a continuation of one of the lower threads.
BRIEF DESCRIPTION OF SEVERAL VIEWS OF DRAWINGS FIG. 1 is a side elevation of a screw constructed in accordance with the present teachings;
FIG. 2 is a fragmentary sectional view showing the screw retaining a workpiece on a supporting structure; and
FIG. 3 is a fragmentary side elevation similar to FIG. 1 showing a slightly modified form of the invention.
DETAILED DESCRIPTION While this invention is susceptible of embodiment in many different forms there is shown in the drawings and will herein be described in detail one specific embodiment, with the understanding that the present disclosure is to be considered as an exemplitication of the principles of the invention and is not intended to limit the invention to the embodiment illustrated.
Referring to the drawings, FIG. 1 shows a screw 10 having an enlarged head 12 on one end of a shank 14 and a tapered point 16 adjacent the opposite end of the shank. The shank 14 is threaded in accordance with the teachings of the present invention and includes a continuous thread 20 extending between the head end 12 and the tapered pointed end 16. The thread 20 has a first portion 20a on the upper end of the screw adjacent the head 12 and a second portion 2Gb adjacent the tapered point or second portion of the shank. An inspection of FIG. l reveals that the thread portions 20a and 20h, respectively defined on the first and second portions of the shank 14 have a common substantially uniform minor diameter a, except for the part of thread portion Zib which is on the tapered point 16, while the first or upper thread portion 20a has a greater major diameter c than the major diameter b of the second or lower thread portion 20h. Also, each portion has a plurality of thread convolutions as is shown in FIG. l.
In addition, the lower or second portion of the shank 14 of the screw 10 has a second parallel thread 22 that has a similar uniform pitch and is located between or intermediate the continuous thread portion 20h. The two threads 20b and 22 cooperate to define parallel twin threads along the lower or second portion of the shank and the thread portion 20a defines a single thread along the upper or first portion of the shank that is a continuation of one of the double or twin parallel threads.
The screw 10 of the present invention is formed by utilizing a blank having a uniform diameter which is deformed by rolling to produce the finished screw. Since the same amount of metal is deformed along the entire length of the shank and the minor diameter of the [thread] threads, except at the point I6, is substantially uniform along the length of the shank, the major diameter of the single threaded portion is larger than the major diameter of the double or multiple threaded portion adjacent the pointed end.
When inserting the screw through a workpiece, such as a particle board or Gypsum board, and attaching the workpiece to a support, such as a metal stud, the double thread portion provides easy entry into the material to form the hole and the double or multiple thread portion allows the screw to be inserted with a minimum amount of torque being applied thereto. As the double threaded portion is inserted past the upper surface of the workpiece, the single threaded portion enlarges the major diameter of one of the multiple threads formed in the workpiece while the thread portion begins its travel into the support to produce a multiple threaded opening in the support.
The larger pitch or wider spacing between respective turns of the thread on the upper portion having a larger major diameter results in a deepening of one of the double threads in the workpiece to further compact the interior of the workpiece and the substantial increment between the major and minor diameters of the thread produces considerably greater holding power after the screw is in its fully inserted position, shown in FIG. 2. Since only one of the double threads initially formed in the workpiece iS enlarged, the higher degree of holding power is achieved without removing or disintegrating the material between respective helixes of the upper thread.
Thus, it will be seen that the present invention provides a simple and efficient manner for increasing the holding power of a screw, particularly used for connecting a workpiece to a support and wherein the workpiece and the support are formed of different materials. The double threaded portion on the lower end of the screw provides for easy, rapid screw entry through the Gypsum board and the metal stud, While the upper single threaded portion attains a higher degree of holding power without disintegrating the material adjacent the opening.
A slightly modified form of the present invention is shown in FIG. 3, in which a shank having a head (not shown) on one end thereof and a pointed tip 32 on tbe opposite end thereof, is provided with a single threaded portion 32 along the upper portion of the screw and a triple threaded portion 34 along the lower portion of the screw with one of the triple threads being a continuation of the single thread along the upper portion. Again, the major diameter of the single thread along the upper portion of the shank is greater than the major diameter along the lower multiple thread defined on the lower portion of the shank while the minor diameters of the two threads are the same.
In the modified embodiment of the invention, the threads are again produced by rolling a uniform, diameter shank and the increment between the major diameters b and c, is larger than the increment between these diameters in the FIG. l embodiment.
Various other modifications will come to mind without departing from the spirit of the present invention. For example, any multiple of threads could be used for the lower portion of the screw so long as one of the parallel threads continues into the upper portion and has a larger major diameter along the upper portion of the shank. In addition, while the head 12 has been shown as being of the hat type, having a kerf 40 for receiving a driving element, such as a screwdriver, various heads, such as the oval head, round head, pan head and Fillister head could be substituted without departing the spirit of the invention. In addition, the screw need not necessarily have a tapered point adjacent the opposite end thereof. However, in its specific embodiment, the screw is preferably of the tapered point type with the thread extending down to the point so that the screw will form its own hole and need not have a pre-drilled hole formed in the workpiece and/or the support.
l claim:
l. A fastening element including a shank with a head on one end and a tapered point on the opposite end, said shank being divided into first and second portions', a continuous thread of uniform pitch on said shank extending substantially between said ends with said portions each having a plurality of thread convolutions; and at least one additional parallel thread of similar uniform pitch intermediate said continuous thread only on said second portion of said shank, said threads having a common minor diameter throughout the length of both portions, said continuous thread having a major diameter on said rst portion which is greater than the major diameter of said threads on said second portion, and the major diameters of said threads on said second portion being substantially uniform.
2. A fastener element as defined in claim l, in which said second portion has a double thread and said first portion has a single thread.
3. A fastener as defined in claim l, in which said second portion has a triple thread and said first portion has a single thread.
4. A fastener element as defined in claim l, in which said second portion is located adjacent said tapered point and said rst portion is located adjacent said head.
5. A fastener element as dened in claim 4, a thread on said shank extending onto said tapered point.
6. A fastener element as defined in claim I, a thread 0n said shank extending onto said tapered point.
7. A fastening element including a shank with a head on one end and a tapered point on the opposite end, said shank being divided into rst and second portions; a continuous thread 0f uniform pitch on .mid shank extending substantially between said ends with .raid portions each having a plurality of thread convolntions; and at least one additional parallel thread of similar uniform pitch intermediate said continuons thread only on said second portion of said shank, said continuous thread haring (t major diameter on said first portion which is greater than the maior diameter of said threads on .raid second p0rtion, and the major diameters of said threads on said second portion being substantially uinform.
5 6 8. A fastener element as defined in claim 7, a thread UNITED STATES PATENTS 0n said shank extending Onto Said ldpered pOn. Rm 3,941 4/1870 Piel-cc s5 46 9. A fastener as in Claim 7, Said fhredds having Ihtr 403,531 8,1839 Rogers 85 46 minor diameter on Ihe said shank. 438,7 54 10/1390 Rogers 85 46 R f C.' d 5 1,809,758 6/1931 Rosenberg 85-46 X e me e 1,980,093 11/1934 Rosenberg zas-46 The following references, cited by the Examiner, are
of record in the patented le of this patent or the original RAMON S- BRITTS. Primary Examilwr patent.
US28111D 1971-01-04 1973-12-04 Fastener with improved thread construction Expired USRE28111E (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US10363771A 1971-01-04 1971-01-04
US42154973A 1973-12-04 1973-12-04

Publications (1)

Publication Number Publication Date
USRE28111E true USRE28111E (en) 1974-08-13

Family

ID=26800674

Family Applications (1)

Application Number Title Priority Date Filing Date
US28111D Expired USRE28111E (en) 1971-01-04 1973-12-04 Fastener with improved thread construction

Country Status (1)

Country Link
US (1) USRE28111E (en)

Cited By (36)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4329099A (en) 1977-02-23 1982-05-11 Kabushiki Kaisha Yamashina Seikosho Self-drilling and self-extruding fastener
US4653244A (en) 1986-01-16 1987-03-31 Farrell Mark A Fastener element
US4856951A (en) 1984-05-11 1989-08-15 Illinois Tool Works, Inc. Fastening assembly for roofs of soft materials
US5120171A (en) * 1990-11-27 1992-06-09 Stuart Surgical Bone screw with improved threads
US5190426A (en) * 1992-03-02 1993-03-02 Illinois Tool Works Inc. Concrete fastener
US5226766A (en) * 1990-11-27 1993-07-13 Stuart Surgical Bone screw with improved threads
USRE34969E (en) * 1990-10-03 1995-06-13 Emhart Inc. Masonry screw anchor
US5492442A (en) * 1990-11-27 1996-02-20 National Medical Specialty, Inc. Bone screw with improved threads
US20040243129A1 (en) * 2003-05-28 2004-12-02 Missoum Moumene Double helical threaded bone screw
US20050021036A1 (en) * 2003-07-21 2005-01-27 Whitmore Robin C. Self-drilling, self-tapping bone screw
US20060140738A1 (en) * 2004-12-27 2006-06-29 Teng-Hung Lin Screw
US20070162029A1 (en) * 2003-07-21 2007-07-12 Whitmore Robin C Self-drilling self-tapping bone screw
US20070172333A1 (en) * 2006-01-09 2007-07-26 Tian-Fu Tsau Screw member having two different thread angles formed on a sharp-edged thread
US20070233122A1 (en) * 2006-02-16 2007-10-04 Sdgi Holdings, Inc. Multi-thread bone screw and method
US20080147119A1 (en) * 2006-11-01 2008-06-19 Depuy Mitek, Inc. Wired sutures
US20090076545A1 (en) * 2007-09-14 2009-03-19 Depuy Mitek, Inc. Methods for anchoring suture to bone
US20090076544A1 (en) * 2007-09-14 2009-03-19 Depuy Mitek, Inc. Dual thread cannulated suture anchor
US20090324364A1 (en) * 2006-07-29 2009-12-31 Smith Ronald A Thread Clamping Device With Improved Locking Distance
US20100278614A1 (en) * 2007-12-12 2010-11-04 Excalibar Screwbolts Limited Fixing device
US20110176889A1 (en) * 2010-01-19 2011-07-21 Powers Fasteners, Inc. Concrete and masonry screw anchor
US20110305541A1 (en) * 2010-06-11 2011-12-15 Pias Sales Co., Ltd. Tapping screw
US20130302110A1 (en) * 2012-05-10 2013-11-14 Simpson Strong-Tie Company, Inc. Fastener with multiple threaded regions
US8944734B2 (en) * 2007-12-28 2015-02-03 Taiwan Shan Yin Int'l Co., Ltd. Bimate screw
US9011505B2 (en) 2009-02-09 2015-04-21 Memometal Technologies Screw for osteosynthesis and arthrodesis
US9267528B2 (en) * 2012-06-26 2016-02-23 Topura Co., Ltd. Tapping screw
US9651077B2 (en) * 2015-04-06 2017-05-16 Simpson Strong-Tie Company, Inc. Fastener for low density materials
US20190249705A1 (en) * 2018-02-12 2019-08-15 Columbia Insurance Company High strength screw
USD896384S1 (en) 2019-06-07 2020-09-15 GetSet Surgical SA Spinal fusion cage
US10982703B2 (en) * 2018-04-09 2021-04-20 The Hillman Group, Inc. Screw-type fastener for concrete and hurricane resistance applications
USD926312S1 (en) 2019-06-07 2021-07-27 GetSet Surgical SA Surgical instrument handle
USD926978S1 (en) 2019-06-07 2021-08-03 GetSet Surgical SA Surgical instrument handle
USD927687S1 (en) 2019-06-07 2021-08-10 GetSet Surgical SA Surgical instrument handle
US11311314B2 (en) 2018-07-31 2022-04-26 GetSet Surgical SA Spinal surgery systems and methods
US11619252B2 (en) * 2018-12-01 2023-04-04 The Hillman Group, Inc. Wallboard anchor
US12473942B2 (en) 2021-03-30 2025-11-18 The Hillman Group, Inc. Wood screw
USD1106810S1 (en) 2022-09-29 2025-12-23 The Hillman Group, Inc. Screw

Cited By (63)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4329099A (en) 1977-02-23 1982-05-11 Kabushiki Kaisha Yamashina Seikosho Self-drilling and self-extruding fastener
US4856951A (en) 1984-05-11 1989-08-15 Illinois Tool Works, Inc. Fastening assembly for roofs of soft materials
US4653244A (en) 1986-01-16 1987-03-31 Farrell Mark A Fastener element
US5417533A (en) * 1990-07-13 1995-05-23 National Medical Specialty, Inc. Bone screw with improved threads
USRE34969E (en) * 1990-10-03 1995-06-13 Emhart Inc. Masonry screw anchor
US5120171A (en) * 1990-11-27 1992-06-09 Stuart Surgical Bone screw with improved threads
US5226766A (en) * 1990-11-27 1993-07-13 Stuart Surgical Bone screw with improved threads
US5492442A (en) * 1990-11-27 1996-02-20 National Medical Specialty, Inc. Bone screw with improved threads
US5190426A (en) * 1992-03-02 1993-03-02 Illinois Tool Works Inc. Concrete fastener
US20040243129A1 (en) * 2003-05-28 2004-12-02 Missoum Moumene Double helical threaded bone screw
US20050021036A1 (en) * 2003-07-21 2005-01-27 Whitmore Robin C. Self-drilling, self-tapping bone screw
US20070162029A1 (en) * 2003-07-21 2007-07-12 Whitmore Robin C Self-drilling self-tapping bone screw
US9168077B2 (en) 2003-07-21 2015-10-27 Surgical Screw Concepts, LLC. Self-drilling self-tapping bone screw
US8540755B2 (en) 2003-07-21 2013-09-24 Robin C. Whitmore Self-drilling self-tapping bone screw
US20060140738A1 (en) * 2004-12-27 2006-06-29 Teng-Hung Lin Screw
US7090453B2 (en) * 2004-12-27 2006-08-15 Teng-Hung Lin Screw
US20070172333A1 (en) * 2006-01-09 2007-07-26 Tian-Fu Tsau Screw member having two different thread angles formed on a sharp-edged thread
US20070233122A1 (en) * 2006-02-16 2007-10-04 Sdgi Holdings, Inc. Multi-thread bone screw and method
US8075604B2 (en) 2006-02-16 2011-12-13 Warsaw Orthopedic, Inc. Multi-thread bone screw and method
US8534974B2 (en) * 2006-07-29 2013-09-17 Ronald A. Smith Thread clamping device with improved locking distance
US20090324364A1 (en) * 2006-07-29 2009-12-31 Smith Ronald A Thread Clamping Device With Improved Locking Distance
US8394123B2 (en) 2006-11-01 2013-03-12 Depuy Mitek, Inc. Wired sutures
US9271715B2 (en) 2006-11-01 2016-03-01 Depuy Mitek, Llc Suture anchor with pulley
US20100185238A1 (en) * 2006-11-01 2010-07-22 Depuy Mitek, Inc. Cannulated suture anchor
US8597328B2 (en) 2006-11-01 2013-12-03 Depuy Mitek, Llc Cannulated suture anchor
US20080147119A1 (en) * 2006-11-01 2008-06-19 Depuy Mitek, Inc. Wired sutures
US9706987B2 (en) 2006-11-01 2017-07-18 Depuy Mitek, Llc Suture anchor with pulley
US8083769B2 (en) 2006-11-01 2011-12-27 Depuy Mitek, Inc. Wired sutures
US8114128B2 (en) 2006-11-01 2012-02-14 Depuy Mitek, Inc. Cannulated suture anchor
US8167906B2 (en) 2006-11-01 2012-05-01 Depuy Mitek, Inc. Suture anchor with pulley
US20080147063A1 (en) * 2006-11-01 2008-06-19 Depuy Mitek, Inc. Cannulated suture anchor
US20080147064A1 (en) * 2006-11-01 2008-06-19 Depuy Mitek, Inc. Suture anchor with pulley
US11576664B2 (en) 2007-09-14 2023-02-14 Depuy Synthes Products, Inc Methods for anchoring suture to bone
US20090076545A1 (en) * 2007-09-14 2009-03-19 Depuy Mitek, Inc. Methods for anchoring suture to bone
US20090076544A1 (en) * 2007-09-14 2009-03-19 Depuy Mitek, Inc. Dual thread cannulated suture anchor
US10327752B2 (en) 2007-09-14 2019-06-25 DePuy Synthes Products, Inc. Methods for anchoring suture to bone
US8702754B2 (en) 2007-09-14 2014-04-22 Depuy Mitek, Llc Methods for anchoring suture to bone
US8882801B2 (en) * 2007-09-14 2014-11-11 Depuy Mitek, Llc Dual thread cannulated suture anchor
US20100278614A1 (en) * 2007-12-12 2010-11-04 Excalibar Screwbolts Limited Fixing device
US8944734B2 (en) * 2007-12-28 2015-02-03 Taiwan Shan Yin Int'l Co., Ltd. Bimate screw
US9011505B2 (en) 2009-02-09 2015-04-21 Memometal Technologies Screw for osteosynthesis and arthrodesis
US9504504B2 (en) 2009-02-09 2016-11-29 Stryker European Holdings I, Llc Screw for osteosynthesis and arthrodesis
US8430619B2 (en) * 2010-01-19 2013-04-30 Black & Decker Inc. Concrete and masonry screw anchor
US20110176889A1 (en) * 2010-01-19 2011-07-21 Powers Fasteners, Inc. Concrete and masonry screw anchor
US8632289B2 (en) * 2010-06-11 2014-01-21 Pias Sales Co., Ltd. Tapping screw
US20110305541A1 (en) * 2010-06-11 2011-12-15 Pias Sales Co., Ltd. Tapping screw
US10480559B2 (en) 2012-05-10 2019-11-19 Simpson Strong-Tie Company, Inc. Fastener with head cutting structure
US20130302110A1 (en) * 2012-05-10 2013-11-14 Simpson Strong-Tie Company, Inc. Fastener with multiple threaded regions
US9482258B2 (en) * 2012-05-10 2016-11-01 Simpson Strong-Tie Company, Inc. Fastener with multiple threaded regions
US9267528B2 (en) * 2012-06-26 2016-02-23 Topura Co., Ltd. Tapping screw
US9651077B2 (en) * 2015-04-06 2017-05-16 Simpson Strong-Tie Company, Inc. Fastener for low density materials
US20190249705A1 (en) * 2018-02-12 2019-08-15 Columbia Insurance Company High strength screw
US10823218B2 (en) * 2018-02-12 2020-11-03 Columbia Insurance Company High strength screw
US10982703B2 (en) * 2018-04-09 2021-04-20 The Hillman Group, Inc. Screw-type fastener for concrete and hurricane resistance applications
US11311314B2 (en) 2018-07-31 2022-04-26 GetSet Surgical SA Spinal surgery systems and methods
US11540863B2 (en) 2018-07-31 2023-01-03 GetSet Surgical SA Spinal surgery systems and methods
US11619252B2 (en) * 2018-12-01 2023-04-04 The Hillman Group, Inc. Wallboard anchor
USD926312S1 (en) 2019-06-07 2021-07-27 GetSet Surgical SA Surgical instrument handle
USD926978S1 (en) 2019-06-07 2021-08-03 GetSet Surgical SA Surgical instrument handle
USD927687S1 (en) 2019-06-07 2021-08-10 GetSet Surgical SA Surgical instrument handle
USD896384S1 (en) 2019-06-07 2020-09-15 GetSet Surgical SA Spinal fusion cage
US12473942B2 (en) 2021-03-30 2025-11-18 The Hillman Group, Inc. Wood screw
USD1106810S1 (en) 2022-09-29 2025-12-23 The Hillman Group, Inc. Screw

Similar Documents

Publication Publication Date Title
USRE28111E (en) Fastener with improved thread construction
US3703843A (en) Fastener with improved thread construction
US3861269A (en) Fastener with improved thread construction
US3492908A (en) Thread swaging screw or bolt
US4069730A (en) Thread-forming screw
US4693654A (en) Self-drilling, self-tapping fastener
EP1505304B1 (en) Fastener for use with frangible material
US4329099A (en) Self-drilling and self-extruding fastener
US3661046A (en) Combination screw
US3177755A (en) Wallboard screws
US2352982A (en) Screw for plastics
GB1346786A (en) Threaded fasteners with stabilizing threads
GB1401014A (en) Extruding and thread-forming screw fasteners
CN1058325C (en) Hole-shaping and thread-forming screw and process for driving in the same
ES420130A1 (en) Self-extruding screw
US2896495A (en) Self-threading nut
KR920701703A (en) Drilling Tapping Screws
GB1179488A (en) Self-Drilling Screws
US3238836A (en) Drilling reaming work extruding self-tapping screw
US3850073A (en) Fastener
US3472119A (en) Thread forming screw and method of making same
US5400845A (en) Technique for fastening logs and fastener therefor
IE35529L (en) Self-tapping fasteners.
GB1293115A (en) Improvements in thread-forming members and methods and apparatus for making the same
GB1494015A (en) Thread forming screw and method of making same