IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0832311
(2007-08-01)
|
등록번호 |
US-8192123
(2012-06-05)
|
발명자
/ 주소 |
- Ernst, Richard
- Grimm, John P.
|
출원인 / 주소 |
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
6 인용 특허 :
33 |
초록
▼
A self-drilling fastener for use in a friable material with or without an underlying member at the point of use comprises an elongated body, a threaded exterior, an enlarged head with torque transmitting surfaces, proximal, intermediate, and distal portions, and a drilling tip generally opposite enl
A self-drilling fastener for use in a friable material with or without an underlying member at the point of use comprises an elongated body, a threaded exterior, an enlarged head with torque transmitting surfaces, proximal, intermediate, and distal portions, and a drilling tip generally opposite enlarged head. Proximal portion has an axial length, a threaded exterior having root and crest diameters and a thread height, where the crest diameter is about twice the root diameter. Intermediate portion has an axial length, a threaded exterior having a root, a crest diameter substantially smaller than proximal portion crest diameter and a thread height substantially smaller than proximal portion thread height. Distal portion has an axial length, a threaded exterior with a root that tapers toward the drilling tip, a crest diameter substantially smaller than the proximal portion crest diameter, and a thread height substantially smaller than the proximal portion thread height portion.
대표청구항
▼
1. A self drilling fastener for use in a friable material with or without an underlying support member at the point of use, comprising: an elongated body having an axis, a threaded exterior having a root, and an enlarged head having torque transmitting surfaces therein, a proximal portion, an interm
1. A self drilling fastener for use in a friable material with or without an underlying support member at the point of use, comprising: an elongated body having an axis, a threaded exterior having a root, and an enlarged head having torque transmitting surfaces therein, a proximal portion, an intermediate portion, a distal portion, and a drilling tip generally opposite said enlarged head;wherein said body is solid along said proximal portion;said proximal portion having an axial length and threads for gripping said friable material having a root with a root diameter between about 3/16 inch and about 5/16 inch, a crest with a crest diameter between about ⅜ inch and about ⅝ inch, and a thread height, wherein said crest diameter is about twice said root diameter;said intermediate portion having an axial length and threads for gripping said member having a root that tapers with a root diameter between about ⅛ inch and about 5/16 inch, a crest with a crest diameter between about ¼ inch and about ½ inch, and a thread height substantially smaller than said thread height of said proximal portion;said distal portion having an axial length and threads for drilling into said member with a root with a root diameter between about 1/16 inch and about 3/16 inch that tapers toward said drilling tip, a crest with a crest diameter substantially smaller than said crest diameter of said proximal portion, and a thread height substantially smaller than said thread height of said proximal portion. 2. A self drilling fastener according to claim 1, wherein said friable material gripping thread root diameter is between about 7/32 inch and about 9/32 inch. 3. A self-drilling fastener according to claim 2, wherein said friable material gripping thread root diameter is at least about ¼ inch. 4. A self-drilling fastener according to claim 1, wherein said friable material gripping thread crest diameter is between about 7/16 inch and about 9/16 inch. 5. A self-drilling fastener according to claim 4, wherein said friable material gripping thread crest diameter is about ½ inch. 6. A self-drilling fastener according to claim 1, wherein said member gripping thread root diameter is between about 5/32 inch and about 7/32 inch. 7. A self-drilling fastener according to claim 6, wherein said member gripping thread root diameter is about 3/16 inch. 8. A self-drilling fastener according to claim 1, wherein said member gripping thread root diameter is between about 2/10 inch and about ¼ inch. 9. A self-drilling fastener according to claim 8, wherein said member gripping thread root diameter is about 7/32 inch. 10. A self-drilling fastener according to claim 1, wherein said member gripping thread crest diameter is between about 5/16 inch and about 7/16 inch. 11. A self-drilling fastener according to claim 10, wherein said member gripping thread crest diameter is about ⅜ inch. 12. A self drilling fastener according to claim 1, wherein said drilling threads of said distal portion comprise a pair of threads each having a lead proximate said drilling tip. 13. A self drilling fastener for use in a friable material with or without an underlying support member at the point of use, comprising: an elongated body having an axis, a threaded exterior having a root, and an enlarged head having torque transmitting surfaces therein, a proximal portion, an intermediate portion, a distal portion, and a drilling tip generally opposite said enlarged head;wherein said body is solid along said proximal portion;said proximal portion having an axial length and threads for gripping said friable material having a root with a root diameter between about 3/16 inch and about 5/16 inch, a crest with a crest diameter between about ⅜ inch and about ⅝ inch, and a thread height, wherein said crest diameter is about twice said root diameter;said intermediate portion having an axial length and threads for gripping said member having a root that tapers with a root diameter between about ⅛ inch and about 5/16 inch, a crest with a crest diameter between about ¼ inch and about ½ inch, and a thread height substantially smaller than said thread height of said proximal portion;said distal portion having an axial length and threads for drilling into said member with a root with a root diameter between about 1/16 inch and about 3/16 inch that tapers toward said drilling tip, a crest with a crest diameter substantially smaller than said crest diameter of said proximal portion, and a thread height substantially smaller than said thread height of said proximal portion;wherein said root of said proximal portion has a radius, said fastener further comprising at least one wing protruding radially from said distal portion to a distance from said axis approximately equal to said root radius. 14. A self drilling fastener according to claim 1, wherein said axial length of said proximal portion is approximately equal to a thickness of said friable material; and a combined axial length of said distal portion axial length and said intermediate portion axial length is greater than the thickness of the friable material. 15. A self drilling fastener according to claim 1, wherein said threads for gripping said friable material have a pitch and said root of said proximal portion between successive turns of said threads has an axial length of about one-half of said pitch. 16. A self drilling fastener according to claim 1, wherein said intermediate portion tapers toward said distal portion at a generally constant first angle with respect to said axis, and wherein said distal portion tapers toward said drilling tip at a generally constant second angle with respect to said axis, said first angle being smaller than said second angle. 17. A self drilling fastener for use in a friable material with or without an underlying support member at the point of use, comprising: a head having torque transmitting surfaces, an elongate body having an axis, a proximal end, a proximal portion adjacent said proximal end, a drilling end opposite said proximal end, and a distal portion adjacent said drilling end;said proximal portion with a high exterior thread having a height and having a root;said distal portion with an exterior thread having a height smaller than said proximal portion high thread height and having a root;wherein said body is solid along said proximal portion;wherein said distal portion root tapers toward said drilling end,wherein said proximal portion thread has a crest diameter that tapers toward said distal portion and said distal portion thread has a crest diameter that tapers toward said drilling end, said distal portion thread tapering at a larger rate than said proximal portion thread;wherein said proximal portion thread, said proximal portion root, said distal portion thread and said distal portion root together provide sufficient structural support to said body to withstand a torsion force required for the drilling end to penetrate a substrate supporting the friable material, the substrate having a hardness greater than the hardness of the friable material; andwherein said proximal portion root is about one-half said proximal portion height, allowing a wall between said torque transmitting surfaces and an underside of said head to be enlarged to withstand increased shearing forces generated when said fastener penetrates said substrate. 18. A self-drilling fastener according to claim 17, wherein said wall is between about 1/16 inch and about 3/32 inch thick. 19. A self drilling fastener according to claim 17, said body further comprising an intermediate portion between said proximal portion and said distal portion, having a thread with a height smaller than said proximal portion high thread height, wherein an axial length of the intermediate portion and the distal portion is greater than a thickness of the friable material. 20. A self drilling anchor according to claim 17, said body further comprising at least one wing protruding radially outwardly from said distal portion and generally towards said drilling end and terminating in a pointed end.
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