US3347519A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Replaceable valve seat for flush valves
Assignee: Individual
•
Filing: 1965-04-12
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Granted: 1967-10-17
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Expires: 1985-04-12
Abstract
No abstract record available.
Inventors
- 👤 Oscar L Engstrom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 08:53
CPC Classifications
E; E03; E03D; E03D1/00; E03D1/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
101 words
A REPLACEABLE VALVE SEAT FOR TUBULAR VALVE SEAT MEMBERS COMPRISING, IN COMBINATION, A RING-SHAPED BODY MEMBERS OF SUCH AXIAL CROSS-SECTIONAL SHAPE AS TO DEFINE CONCENTRICALLY SPACED OUTER AND INNER WALL PORTIONS INTEGRALLY FORMED AT ONE END WITH A ROUNDED ANNULAR SEAT PORTION, THE OUTER ONE OF SAID WALL PORTIONS BEING IN THE FORM OF A UNIFORMLY STRAIGHT CYLINDRICAL SKIRT, THE INNER ONE OF SAID WALL PORTIONS BEING COMPARATIVELY LONG AND HAVING LONGITUDINAL SLOTS DEFINING INTO A PLURALITY OF PERIPHERALLYSPACED TONGUES, THE TERMINAL ENDS OF SAID TONGUES BEING INWARDLY TURNED, SAID SLOTS EXTENDING INWARDLY TO POSITIONS LATERALLY OPPOSITE SAID OUTER WALL PORTION.
Claim 2
Dependent Claim
101 words
A REPLACEABLE VALVE SEAT FOR TUBULAR VALVE SEAT MEMBERS COMPRISING, IN COMBINATION, A RING-SHAPED BODY MEMBERS OF SUCH AXIAL CROSS-SECTIONAL SHAPE AS TO DEFINE CONCENTRICALLY SPACED OUTER AND INNER WALL PORTIONS INTEGRALLY FORMED AT ONE END WITH A ROUNDED ANNULAR SEAT PORTION, THE OUTER ONE OF SAID WALL PORTIONS BEING IN THE FORM OF A UNIFORMLY STRAIGHT CYLINDRICAL SKIRT, THE INNER ONE OF SAID WALL PORTIONS BEING COMPARATIVELY LONG AND HAVING LONGITUDINAL SLOTS DEFINING INTO A PLURALITY OF PERIPHERALLYSPACED TONGUES, THE TERMINAL ENDS OF SAID TONGUES BEING INWARDLY TURNED, SAID SLOTS EXTENDING INWARDLY TO POSITIONS LATERALLY OPPOSITE SAID OUTER WALL 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) | 1970-10-16 | 1971-04-17 | 1971-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-16 | 1975-04-17 | 1975-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-16 | 1979-04-17 | 1979-10-17 | $7700.00 | Window Closed / Lapsed |