US3091254A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dual seating ball check valve
Assignee: PRECISION CHEMICAL PUMP CORP
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Filing: 1961-11-24
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Granted: 1963-05-28
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Expires: 1981-11-24
Abstract
No abstract record available.
Inventors
- 👤 Enrique L Kilayko
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 06:35
CPC Classifications
F; F16; F16K; F16K15/00; F16K15/02; F16K15/04; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7866; Y10T137/7867; Y10T137/7868; Y10T137/7904; Y10T137/7908; Y10T137/7909; Y10T137/791; Y10T137/7912
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
159 words
IN A CHECK HAVING A PORT: SEALING MEANS COMPRISING A BALL MOVABLE TOWARD AND AWAY FROM SAID PORT, SAID BALL HAVING A DIAMETER SUBSTANTIALLY LARGER THAN THE LARGEST DIMENSION OF SAID PORT; SEATING MEANS POSITIONED BETWEEN SAID BALL AND SAID PORT COMPRISING INNER AND OUTER CIRCULAR RINGS OF AN ELASTOMERIC SUBSTANCE HAVING A HARDNESS IN THE RANGE OF 50-70 DUROMETER AND HAVING RESPECTIVELY INNER AND OUTER CIRCULAR SEALING SURFACES; INNER AND OUTER SEATING CAVITIES EMBRACING SAID SEATING MEANS; SAID SEALING SURFACES HAVING SEQUENTIALLY DECREASING DIAMETERS PROGRESSIVELY EMOTE FROM SAID BALL; SAID SURFACES BEING ARRANGED FOR CONTACT WITH SAID BALL IN A SEQUENCE PROGRESSIVELY REMOTE FROM SAID BALL ON MOVEMENT FROM SAID BALL TOWARD SAID PORT, SUCH THAT WHEN SAID BALL STRIKES SAID INNER SURFACE IT OVERLIES IN SPACED RELATION SAID OUTER SURFACE; SAID INNER SURFACE HAVING A SEATING ANGLE IN THE RANGE OF 57-60 DEGREES AND SAID OUTER SURFACE HAVING A SEATING ANGLE IN THE RANGE OF 38-41 DEGREES.
Claim 2
Dependent Claim
159 words
IN A CHECK HAVING A PORT: SEALING MEANS COMPRISING A BALL MOVABLE TOWARD AND AWAY FROM SAID PORT, SAID BALL HAVING A DIAMETER SUBSTANTIALLY LARGER THAN THE LARGEST DIMENSION OF SAID PORT; SEATING MEANS POSITIONED BETWEEN SAID BALL AND SAID PORT COMPRISING INNER AND OUTER CIRCULAR RINGS OF AN ELASTOMERIC SUBSTANCE HAVING A HARDNESS IN THE RANGE OF 50-70 DUROMETER AND HAVING RESPECTIVELY INNER AND OUTER CIRCULAR SEALING SURFACES; INNER AND OUTER SEATING CAVITIES EMBRACING SAID SEATING MEANS; SAID SEALING SURFACES HAVING SEQUENTIALLY DECREASING DIAMETERS PROGRESSIVELY EMOTE FROM SAID BALL; SAID SURFACES BEING ARRANGED FOR CONTACT WITH SAID BALL IN A SEQUENCE PROGRESSIVELY REMOTE FROM SAID BALL ON MOVEMENT FROM SAID BALL TOWARD SAID PORT, SUCH THAT WHEN SAID BALL STRIKES SAID INNER SURFACE IT OVERLIES IN SPACED RELATION SAID OUTER SURFACE; SAID INNER SURFACE HAVING A SEATING ANGLE IN THE RANGE OF 57-60 DEGREES AND SAID OUTER SURFACE HAVING A SEATING ANGLE IN THE RANGE OF 38-41 DEGREES.
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) | 1966-05-27 | 1966-11-26 | 1967-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-05-27 | 1970-11-26 | 1971-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-05-27 | 1974-11-26 | 1975-05-28 | $7700.00 | Window Closed / Lapsed |