US3726330A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Screw fastener
Assignee: Individual
•
Filing: 1971-07-28
•
Granted: 1973-04-10
•
Expires: 1991-07-28
Abstract
Abstract A screw fastener having a narrow helical thread on the shank, the shank having a wall intermediate thread convolutions, which is substantially wider than the thread. Serrations on the wall lock the screw in a bore of a plastic boss.
Inventors
- 👤 R Adler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:50
CPC Classifications
F; F16; F16B; F16B25/00; F16B25/001; F16B25/0015; F16B25/0036; F16B25/0042; F16B25/0047; F16B25/0078; F16B35/00; F16B35/04; F16B35/041; F16B39/00; F16B39/22; Y; Y10; Y10S; Y10S411/00; Y10S411/924; Y10S411/929; Y10S411/938
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
102 words
A screw fastener which comprises a shank, a head, and a helical thread on the shank, the shank having a wall intermediate thread convolutions, the wall being substantially wider than the thread, there being a plurality of lengthwise grooves formed only in the shank wall between the thread convolutions with ridges on the wall at the sides of the grooves, each groove with its adjacent ridges being spaced from adjacent grooves with their adjacent edges by shank wall portions intermediate ridges, the thread being substantially triangular in cross section with exposed faces thereof meeting at an angle to define a narrow edge.
Claim 2
Dependent Claim
102 words
A screw fastener which comprises a shank, a head, and a helical thread on the shank, the shank having a wall intermediate thread convolutions, the wall being substantially wider than the thread, there being a plurality of lengthwise grooves formed only in the shank wall between the thread convolutions with ridges on the wall at the sides of the grooves, each groove with its adjacent ridges being spaced from adjacent grooves with their adjacent edges by shank wall portions intermediate ridges, the thread being substantially triangular in cross section with exposed faces thereof meeting at an angle to define a narrow edge.
Claim 3
Dependent Claim
16 words
A screw fastener as in claim 1 wherein the grooves terminate short of the thread convolutions.
Claim 4
Dependent Claim
100 words
A screw fastener which comprises a shank, a head, and a helical thread on the shank, the shank having a wall intermediate thread convolutions, the wall being substantially wider than the thread, there being a plurality of lengthwise grooves formed only in the shank wall between the thread convolutions with ridges on the wall at the sides of the grooves, each groove with its adjacent ridges being spaced from adjacent grooves with their adjacent edges by shank wall portions intermediate ridges, the thread being substantially triangular in cross section with exposed faces thereof meeting at an angle of approximately 30*.
Claim 5
Dependent Claim
100 words
A screw fastener which comprises a shank, a head, and a helical thread on the shank, the shank having a wall intermediate thread convolutions, the wall being substantially wider than the thread, there being a plurality of lengthwise grooves formed only in the shank wall between the thread convolutions with ridges on the wall at the sides of the grooves, each groove with its adjacent ridges being spaced from adjacent grooves with their adjacent edges by shank wall portions intermediate ridges, the thread being substantially triangular in cross section with exposed faces thereof meeting at an angle of approximately 30*.
References Cited (Backward Citations)
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US2263137A
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US2380724A
Cited
US2742074A
Cited
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Cited
US3081482A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-04-09 | 1976-10-09 | 1977-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-09 | 1980-10-09 | 1981-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-09 | 1984-10-09 | 1985-04-10 | $7700.00 | Window Closed / Lapsed |