Patent US3620251A successfully refreshed from Google Patents.
US3620251A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valves
Assignee: Flowserve Corp
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Filing: 1970-01-21
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Granted: 1971-11-16
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Expires: 1990-01-21
Abstract
Abstract A valve for high-pressure fluids is provided in which multiple seating is effected by multiple engagement of seating portions of the valve plug one of which is transversely outwardly of the other with an expanding tapered or flared portion so that the operator can feel the seating and so that material displaced by one seating portion of the valve plug bucks or is in opposition to the material displaced by the other.
Inventors
- 👤 John C Bowen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:56
CPC Classifications
F; F16; F16K; F16K25/00; F16K1/00; F16K1/32; F16K1/34; F16K1/36; F16K1/38; F16K1/42; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/87917; Y10T137/87981
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
134 words
A valve comprising a valve body having an inlet passageway and a valve chamber with which said passageway is in communication, said valve body having an outlet passageway communicating with said valve chamber, said valve chamber having a metallic valve seat with an interior surface having an outwardly flaring surface extendIng therefrom, a valve plug for movement towards and away from said seat, said valve plug having a first frustoconical seating surface portion for engagement with said seat at a location spaced from said chamber and said valve plug having a second outwardly extending seating surface portion for engagement with said seat at a spaced location closer to the chamber than the location engaged by said first seating portion, both said seating surface portions being engageable in opposed metal displacing relation to said seat.
Claim 2
Dependent Claim
134 words
A valve comprising a valve body having an inlet passageway and a valve chamber with which said passageway is in communication, said valve body having an outlet passageway communicating with said valve chamber, said valve chamber having a metallic valve seat with an interior surface having an outwardly flaring surface extendIng therefrom, a valve plug for movement towards and away from said seat, said valve plug having a first frustoconical seating surface portion for engagement with said seat at a location spaced from said chamber and said valve plug having a second outwardly extending seating surface portion for engagement with said seat at a spaced location closer to the chamber than the location engaged by said first seating portion, both said seating surface portions being engageable in opposed metal displacing relation to said seat.
Claim 3
Dependent Claim
20 words
A valve as defined in claim 1 in which said valve seat is carried on a cone ring seat member.
Claim 4
Dependent Claim
16 words
A valve as defined in claim 1 in which said second seating surface portion is frustoconical.
Claim 5
Dependent Claim
22 words
A valve as defined in claim 1 in which said second seating surface portion is transversely outwardly of said first seating portion.
Claim 6
Dependent Claim
23 words
A valve as defined in claim 1 in which said second seating surface portion is transversely disposed and outwardly of said first portion.
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) | 1974-11-15 | 1975-05-17 | 1975-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-15 | 1979-05-17 | 1979-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-15 | 1983-05-17 | 1983-11-16 | $7700.00 | Window Closed / Lapsed |