US4033615A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Port thread
Assignee: Ross Operating Valve Co
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Filing: 1975-06-16
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Granted: 1977-07-05
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Expires: 1995-06-16
Abstract
Abstract A method and construction for the formation of an internal thread for fluid or other ports which may receive NPT, BSP tapered, or BSP parallel external threads. The port configuration varies with different nominal tube bore diameters, but comprises one or more of the following: Adjustment of tooth form. Adjustment of pitch. A tapered entry and parallel inner portion. The invention applied at least to nominal diameters between 1/8 and 11/2inches.
Inventors
- 👤 Raymond A. Miller, Jr.
- 👤 Douglas M. Thornton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:08
CPC Classifications
F; F16; F16L; F16L15/00; F16L15/006
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
58 words
A threaded port in a valve body for the reception of hardware having NPT, BSP Tr. or BSP Pl. external threads with nominal tube bores at least between 1/4" and 1", comprising threads having a pitch midway between the NPT and BSP pitches for the nominal tube bore and an included angle between thread sides of 571/2 °.
Claim 2
Dependent Claim
58 words
A threaded port in a valve body for the reception of hardware having NPT, BSP Tr. or BSP Pl. external threads with nominal tube bores at least between 1/4" and 1", comprising threads having a pitch midway between the NPT and BSP pitches for the nominal tube bore and an included angle between thread sides of 571/2 °.
Claim 3
Dependent Claim
27 words
A thread port according to claim 1 wherein the first two threads at the entrance of the port are tapered inwardly and the remaining threads are parallel.
References Cited (Backward Citations)
US597000A
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US720578A
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US1973848A
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GB413027A
Cited
US2056112A
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US3079181A
Cited
US3175850A
Cited
US3158390A
Cited
US3323402A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-07-04 | 1981-01-03 | 1981-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-07-04 | 1985-01-03 | 1985-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-07-04 | 1989-01-03 | 1989-07-05 | $7700.00 | Window Closed / Lapsed |