US3658295A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve seat
Assignee: National Aeronautics and Space Administration
•
Filing: 1970-02-04
•
Granted: 1972-04-25
•
Expires: 1990-02-04
Abstract
Abstract A valve seat of an annular configuration having a segmented valve sealing surface including a cylindrical surface extending concentrically through the seat defining a substantially fullflow throat terminating in a first outwardly flared conical sealing surface segment which, in turn, terminates in a second outwardly flared conical surface segment, a feature of the seat being the inclusion of a pair of coaxially arranged conical surface segments circumscribing the throat of the valve seat whereby a reduced-stress area sealing surface is provided for receiving a plug and the life of the valve seat is increased.
Inventors
- 👤 George L Root
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 06:48
CPC Classifications
F; F16; F16K; F16K1/00; F16K1/32; F16K1/34; F16K1/42
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
132 words
An improved valve seat for use in valves employed in controlling flow of fuels and oxidizers for reaction motors comprising: a disk-shaped member formed of substantially pure copper material including a substantially cylindrical wall defining a throat axially extended through said member and circumscribed by a segmented sealing surface of a substantially annular configuration, including a first frusto-conical segment extending outwardly from said wall at a first included angle of 21* with respect to the axis of the throat and outwardly terminating in a second truncated frusto-conical segment extending outwardly from said wall at a second included angle of 60* with respect to the axis of said throat, whereby a peening and rolling of the copper material into the throat is obviated for thereby increasing the operative life of the valve seat.
Claim 2
Dependent Claim
132 words
An improved valve seat for use in valves employed in controlling flow of fuels and oxidizers for reaction motors comprising: a disk-shaped member formed of substantially pure copper material including a substantially cylindrical wall defining a throat axially extended through said member and circumscribed by a segmented sealing surface of a substantially annular configuration, including a first frusto-conical segment extending outwardly from said wall at a first included angle of 21* with respect to the axis of the throat and outwardly terminating in a second truncated frusto-conical segment extending outwardly from said wall at a second included angle of 60* with respect to the axis of said throat, whereby a peening and rolling of the copper material into the throat is obviated for thereby increasing the operative life of the valve seat.
References Cited (Backward Citations)
US1200668A
Cited
US2454160A
Cited
US2661753A
Cited
US2598187A
Cited
US2927737A
Cited
US2914295A
Cited
US3131906A
Cited
US3510103A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-04-25 | 1975-10-25 | 1976-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-25 | 1979-10-25 | 1980-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-25 | 1983-10-25 | 1984-04-25 | $7700.00 | Window Closed / Lapsed |