US3861269A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fastener with improved thread construction
Assignee: Superior Dry Wall Screw Mfg Co Inc
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Filing: 1972-11-13
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Granted: 1975-01-21
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Expires: 1992-11-13
Abstract
Abstract A fastener having a shank divided into first and second portions, with a continuous thread on both portions extending from end to end of the shank and plural convolutions on both portions; an additional thread extends only on the second portion intermediate the continuous thread, of similar uniform pitch as the continuous thread, and parallel to it; the second portion may be adjacent the head or intermediate the ends of the shank. The thread major diameters may be uniform, the major diameter on the second portion may be less than the major diameter on the first portion, the major diameter may be uniform except for the leading portion of the additional thread, or the additional thread may have a smaller major diameter than the continuous thread. The additional thread may be spaced unevenly relative to the continuous thread along the shank. The shank terminates in a head and a pointed or blunt end, and the minor diameter of both portions may be the same or that of the second portion may be larger than that of the first portion.
Inventors
- 👤 Richard C Laverty
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:29
CPC Classifications
F; F16; F16B; F16B25/00; F16B25/001; F16B25/0031; F16B25/0036; F16B25/0042; F16B25/0047; F16B25/0057; F16B25/0068
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
101 words
A fastening element including a shank, a head axially of one end of said shank, and a tapered point axially of the opposite end of said shank, said shank being divided into a first portion located adjacent said point and a second portion located adjacent said head; a continuous thread of uniform pitch on said shank extending substantially over the entire length of said shank with at least one of said portions 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.
Claim 2
Dependent Claim
101 words
A fastening element including a shank, a head axially of one end of said shank, and a tapered point axially of the opposite end of said shank, said shank being divided into a first portion located adjacent said point and a second portion located adjacent said head; a continuous thread of uniform pitch on said shank extending substantially over the entire length of said shank with at least one of said portions 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.
Claim 3
Dependent Claim
24 words
The fastening element of claim 1, wherein the major diameter of said continuous thread is substantially constant substantially throughout the length of said shank.
Claim 4
Dependent Claim
25 words
The fastening element of claim 2, said additional thread having a major diameter equal to that of said continuous thread substantially throughout the length thereof.
Claim 5
Dependent Claim
53 words
The fastening element of claim 2, said additional thread having a major diameter at the portion thereof closest said point of a lesser diameter than the major diameter of said continuous thread, the remaining portion of said additional thread having a major diameter substantially equal to the major diameter of said continuous thread.
Claim 6
Dependent Claim
29 words
The fastening element of claim 2, said additional thread having a major diameter substantially throughout its length of a lesser diameter than the major diameter of said continuous thread.
Claim 7
Dependent Claim
31 words
The fastening element of claim 1, said continuous thread having a major diameter on said first portion which is greater than the major diameter of the threads on said second portion.
Claim 8
Dependent Claim
19 words
The fastening element of claim 1, said threads having a common minor diameter throughout the length of both portions.
Claim 9
Dependent Claim
15 words
The fastening eleMent of claim 1, wherein the axial spacing between said threads is unequal.
Claim 10
Dependent Claim
104 words
A fastening element including a shank with a head axially of one end thereof and a tapered point axially of the opposite end thereof, said shank being divided into a first portion having a part thereof adjacent said head and another part thereof adjacent said point, with a second portion intermediate said parts of said first portion; 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.
Claim 11
Dependent Claim
104 words
A fastening element including a shank with a head axially of one end thereof and a tapered point axially of the opposite end thereof, said shank being divided into a first portion having a part thereof adjacent said head and another part thereof adjacent said point, with a second portion intermediate said parts of said first portion; 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.
Claim 12
Dependent Claim
23 words
The fastening element of claim 9, the major diameter of said additional thread being less than the major diameter of said continuous thread.
Claim 13
Dependent Claim
88 words
A fastening element including a shank with a head axially of one end thereof and a blunt end axially thereof opposite said head, said shank being divided into a first portion adjacent said blunt end and second portion adjacent said head; 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.
Claim 14
Dependent Claim
88 words
A fastening element including a shank with a head axially of one end thereof and a blunt end axially thereof opposite said head, said shank being divided into a first portion adjacent said blunt end and second portion adjacent said head; 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.
Claim 15
Dependent Claim
39 words
A fastening element as set forth in claim 11, said threads on said second portion having a uniform minor diameter and said thread on said first portion having a minor diameter less than the threads on said second portion.
Claim 16
Dependent Claim
20 words
The fastening element of claim 1, wherein said second portion has a plurality of thread convolutions of said continuous thread.
Claim 17
Dependent Claim
12 words
The fastener of claim 13, said continuous thread extending onto said point.
Claim 18
Dependent Claim
12 words
The fastener of claim 1, said continuous thread extending onto said point.
Claim 19
Dependent Claim
18 words
The fastener of claim 1, wherein both portions have a plurality of thread convolutions of said continuous thread.
Claim 20
Dependent Claim
12 words
The fastener of claim 16, said continuous thread extending onto said point.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-01-20 | 1978-07-22 | 1979-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-20 | 1982-07-22 | 1983-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-20 | 1986-07-22 | 1987-01-21 | $7700.00 | Window Closed / Lapsed |