US3703843A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fastener with improved thread construction
Assignee: MSL IND Inc
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Filing: 1971-01-04
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Granted: 1972-11-28
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Expires: 1991-01-04
Abstract
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.
Inventors
- 👤 Richard C Laverty
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:50
CPC Classifications
F; F16; F16B; F16B25/00; F16B25/0036; F16B25/0042; F16B25/0068; F16B25/001; F16B25/0031; F16B25/0057
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
128 words
A fastenting 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 first 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.
Claim 2
Dependent Claim
128 words
A fastenting 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 first 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.
Claim 3
Dependent Claim
25 words
A fastener element as defined in claim 1, in which said second portion has a double thread and said first portion has a single thread.
Claim 4
Dependent Claim
24 words
A fastener as defined in claim 1, in which said second portion has a triple thread and said first portion has a single thread.
Claim 5
Dependent Claim
28 words
A fastener element as defined in claim 1, in which said second portion is located adjacent said tapered point and said first portion is located adjacent said head.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-11-28 | 1976-05-29 | 1976-11-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-11-28 | 1980-05-29 | 1980-11-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-11-28 | 1984-05-29 | 1984-11-28 | $7700.00 | Window Closed / Lapsed |