US3234959A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Check valve device
Assignee: Individual
•
Filing: 1963-07-19
•
Granted: 1966-02-15
•
Expires: 1983-07-19
Abstract
No abstract record available.
Inventors
- 👤 Feinberg Maurice
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:04
CPC Classifications
F; F16; F16K; F16K11/00; F16K11/10; F16K15/00; F16K15/02; F16K15/025; F16K15/06; F16K15/063; F16K15/066; F16K2200/00; F16K2200/30; F16K2200/305; F16K2200/3053; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7781; Y10T137/7837; Y10T137/7904; Y10T137/7922; Y10T137/7925; Y10T137/7929; Y10T137/7939; Y10T137/8593; Y10T137/87571; Y10T137/87676; Y10T137/87684
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
145 words
A FLUID CHECK VALVE COMPRISING A HOLLOW CASING, A FLUID INLET PASSAGE SPACED OPPOSITE ONE WALL PORTION OF SAID CASING, A FLUID OUTLET PASSAGE COMMUNICATING WITH SAID INLET PASSAGE, A TUBULAR SLEEVE MEMBER SLIDEABLY RECEIVED WITHIN SAID PASSAGE, SAID MEMBER BEING CLOSED AT THE END THEREOF FACING SAID WALL PORTION, A PERIPHERAL FLANGE EXTENDING AROUND THE CLOSED END OF SAID MEMBER, MEANS DEFINING A FLUID METERING ORIFICE IN THE SIDE WALL OF SAID MEMBER UPWARDLY FROM SAID FLANGE, A FRUSTOCONICAL COIL SPRING COMPRESSED BETWEEN SAID FLANGE AND SAID CASING WALL PORTION FOR BIASING SAID MEMBER AWAY FROM SAID WALL PORTION AND A TUBULAR SKIRT PROJECTING FROM THE CLOSED END OF SAID MEMBER TOWARD SAID CASING WALL PORTION, THE SPACING BETWEEN SAID SKIRT AND SAID WALL PORTION BEING GREATER THAN THE SPACING BETWEEN SAID METERING ORIFICE AND THE END OF SAID INLET PASSAGE WITHIN SAID CASING.
Claim 2
Dependent Claim
145 words
A FLUID CHECK VALVE COMPRISING A HOLLOW CASING, A FLUID INLET PASSAGE SPACED OPPOSITE ONE WALL PORTION OF SAID CASING, A FLUID OUTLET PASSAGE COMMUNICATING WITH SAID INLET PASSAGE, A TUBULAR SLEEVE MEMBER SLIDEABLY RECEIVED WITHIN SAID PASSAGE, SAID MEMBER BEING CLOSED AT THE END THEREOF FACING SAID WALL PORTION, A PERIPHERAL FLANGE EXTENDING AROUND THE CLOSED END OF SAID MEMBER, MEANS DEFINING A FLUID METERING ORIFICE IN THE SIDE WALL OF SAID MEMBER UPWARDLY FROM SAID FLANGE, A FRUSTOCONICAL COIL SPRING COMPRESSED BETWEEN SAID FLANGE AND SAID CASING WALL PORTION FOR BIASING SAID MEMBER AWAY FROM SAID WALL PORTION AND A TUBULAR SKIRT PROJECTING FROM THE CLOSED END OF SAID MEMBER TOWARD SAID CASING WALL PORTION, THE SPACING BETWEEN SAID SKIRT AND SAID WALL PORTION BEING GREATER THAN THE SPACING BETWEEN SAID METERING ORIFICE AND THE END OF SAID INLET PASSAGE WITHIN SAID CASING.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-02-14 | 1969-08-16 | 1970-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-14 | 1973-08-16 | 1974-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-14 | 1977-08-16 | 1978-02-15 | $7700.00 | Window Closed / Lapsed |