US3352531A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Check valve
Assignee: Scovill Inc
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Filing: 1964-04-02
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Granted: 1967-11-14
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Expires: 1984-04-02
Abstract
No abstract record available.
Inventors
- 👤 Louis E Kilmarx
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 02:33
CPC Classifications
F; F16; F16K; F16K15/00; F16K15/02; F16K15/025; F16K15/026
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
175 words
A CHECK VALVE ASSEMBLY COMPRISING A TUBULAR HOUSING HAVING IN THE BORE THEREOF INWARDLY FROM ITS OUTER END AN INWARDLY FACING SHOULDER, AN ANNULAR DEFORMABLE ELASTIC SEALING MEMBER IN SAID BORE AND PROVIDING THEREWITH A FLUIDTIGHT FIT, SPRING MEANS BIASING THE ANNULAR SEALING MEMBER INTO ENGAGEMENT WITH THE SHOULDER, A HOLLOW PIN CLOSED AT ITS OUTER END WITHIN THE HOUSING BORE, THE ANNULAR SEALING MEMBER NORMALLY ENGAGING OVER THE OUTER CLOSED END PORTION OF SAID PIN WITH A FLUIDTIGHT FIT, SAID CLOSED OUTER END PORTION OF THE PIN AND SAID ANNULAR SEALING MEMBER BEING AXIALLY MOVABLE, ONE RELATIVELY TO THE OTHER, AND THE HOLLOW PORTION OF THE PIN INWARDLY OF THE ANNULAR SEALING MEMBER WHEN IN ENGAGEMENT WITH SAID SHOULDER HAVING A TRANSVERSE PASSAGE PROVIDING OPEN COMMUNICATION BETWEEN THE HOLLOW PORTION OF THE PIN AND THE HOUSING BORE, WHEREBY RELATIVE AXIAL MOVEMENT BETWEEN THE ANNULAR SEALING MEMBER AND THE PIN, THROUGH A PREDETERMINED DISTANCE GREATER THAN THE AXIAL DIMENSION OF THE SEALING MEMBER WILL ESTABLISH OPEN COMMUNICATION FOR FULID THROUGH THE BORE OF THE HOUSING.
Claim 2
Dependent Claim
175 words
A CHECK VALVE ASSEMBLY COMPRISING A TUBULAR HOUSING HAVING IN THE BORE THEREOF INWARDLY FROM ITS OUTER END AN INWARDLY FACING SHOULDER, AN ANNULAR DEFORMABLE ELASTIC SEALING MEMBER IN SAID BORE AND PROVIDING THEREWITH A FLUIDTIGHT FIT, SPRING MEANS BIASING THE ANNULAR SEALING MEMBER INTO ENGAGEMENT WITH THE SHOULDER, A HOLLOW PIN CLOSED AT ITS OUTER END WITHIN THE HOUSING BORE, THE ANNULAR SEALING MEMBER NORMALLY ENGAGING OVER THE OUTER CLOSED END PORTION OF SAID PIN WITH A FLUIDTIGHT FIT, SAID CLOSED OUTER END PORTION OF THE PIN AND SAID ANNULAR SEALING MEMBER BEING AXIALLY MOVABLE, ONE RELATIVELY TO THE OTHER, AND THE HOLLOW PORTION OF THE PIN INWARDLY OF THE ANNULAR SEALING MEMBER WHEN IN ENGAGEMENT WITH SAID SHOULDER HAVING A TRANSVERSE PASSAGE PROVIDING OPEN COMMUNICATION BETWEEN THE HOLLOW PORTION OF THE PIN AND THE HOUSING BORE, WHEREBY RELATIVE AXIAL MOVEMENT BETWEEN THE ANNULAR SEALING MEMBER AND THE PIN, THROUGH A PREDETERMINED DISTANCE GREATER THAN THE AXIAL DIMENSION OF THE SEALING MEMBER WILL ESTABLISH OPEN COMMUNICATION FOR FULID THROUGH THE BORE OF THE HOUSING.
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) | 1970-11-13 | 1971-05-15 | 1971-11-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-11-13 | 1975-05-15 | 1975-11-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-11-13 | 1979-05-15 | 1979-11-14 | $7700.00 | Window Closed / Lapsed |