US3205756A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thread system
Assignee: SPS Technologies LLC
•
Filing: 1962-12-31
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Granted: 1965-09-14
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Expires: 1982-12-31
Abstract
No abstract record available.
Inventors
- 👤 Jr Raymond Ollis
- 👤 Richard A Walker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:05
CPC Classifications
F; F16; F16B; F16B33/00; F16B33/02; Y; Y10; Y10S; Y10S411/00; Y10S411/916; Y10S411/924; Y10S411/929; Y10S411/938
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
195 words
A THREADED FASTENER INCLUDING AN INTERNALLY THREADED NUT HAVING A CONSTANT MAJOR DIAMETER AND AN EXTERNALLY THREADED BOLT HAVING A CONSTANT MAJOR DIAMETER AND A CONSTANT MINOR DIAMETER, SAID NUT BEING CHARACTERIZED IN THAT THE NUT IS AXIALLY COUNTERBORED TRUNCATE THE CRESTS OF FROM ONE TO FOUR NUT THREADS ADJACENT THE BEARING FACE OF THE NUT, SAID COUNTERBORE EXTENDING RADIALLY SUBSTANTIALLY NO FURTHER THAN THE PITCH DIAMETER OF THE NUT, AND SAID FASTENER BEING CHARACTERIZED IN THAT THE INTERNAL THREADS HAVE, WHEN IN AN UNLOADED CONDITION, A PROGRESSIVELY LONGER LEAD THAN THE LEAD OF THE UNLOADED EXTERNAL THREADS, THE LEAD DIFFERENTIAL BEING SUFFCIENT TO COMPENSATE FOR THE SHORTENING OF THE LEAD OF THE INTERNAL THREADS AND THE ELONGATION OF THE LEAD OF THE EXTERNAL THREADS WHICH OCCURS ON LOADING OF THE FASTENER AND THEREBY PROVIDE FOR A MORE UNIFORM DISTRIBUTION OF THE STRESS CONCENTRATIONS AT THE ROOTS OF THE ENGAGED EXTERNAL THREADS AND SAID FASTENER BEING FURTHER CHARACTERIZED IN THAT THE TRUE PITCH DIAMETERS OF THE INTERNAL AND EXTERNAL THREADS ARE CORRECTED TO CAUSE THE VIRTUAL PITCH DIAMETERS TO APPROACH THE BASIC PITCH DIAMETER AND THEREBY PREVENT AN INTERFERENCE FIT WHEN IN AN UNLOADED CONDITION.
Claim 2
Dependent Claim
195 words
A THREADED FASTENER INCLUDING AN INTERNALLY THREADED NUT HAVING A CONSTANT MAJOR DIAMETER AND AN EXTERNALLY THREADED BOLT HAVING A CONSTANT MAJOR DIAMETER AND A CONSTANT MINOR DIAMETER, SAID NUT BEING CHARACTERIZED IN THAT THE NUT IS AXIALLY COUNTERBORED TRUNCATE THE CRESTS OF FROM ONE TO FOUR NUT THREADS ADJACENT THE BEARING FACE OF THE NUT, SAID COUNTERBORE EXTENDING RADIALLY SUBSTANTIALLY NO FURTHER THAN THE PITCH DIAMETER OF THE NUT, AND SAID FASTENER BEING CHARACTERIZED IN THAT THE INTERNAL THREADS HAVE, WHEN IN AN UNLOADED CONDITION, A PROGRESSIVELY LONGER LEAD THAN THE LEAD OF THE UNLOADED EXTERNAL THREADS, THE LEAD DIFFERENTIAL BEING SUFFCIENT TO COMPENSATE FOR THE SHORTENING OF THE LEAD OF THE INTERNAL THREADS AND THE ELONGATION OF THE LEAD OF THE EXTERNAL THREADS WHICH OCCURS ON LOADING OF THE FASTENER AND THEREBY PROVIDE FOR A MORE UNIFORM DISTRIBUTION OF THE STRESS CONCENTRATIONS AT THE ROOTS OF THE ENGAGED EXTERNAL THREADS AND SAID FASTENER BEING FURTHER CHARACTERIZED IN THAT THE TRUE PITCH DIAMETERS OF THE INTERNAL AND EXTERNAL THREADS ARE CORRECTED TO CAUSE THE VIRTUAL PITCH DIAMETERS TO APPROACH THE BASIC PITCH DIAMETER AND THEREBY PREVENT AN INTERFERENCE FIT WHEN IN AN UNLOADED CONDITION.
References Cited (Backward Citations)
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US1994132A
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US2452192A
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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) | 1968-09-13 | 1969-03-15 | 1969-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-13 | 1973-03-15 | 1973-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-13 | 1977-03-15 | 1977-09-14 | $7700.00 | Window Closed / Lapsed |