Patent US3378029A successfully refreshed from Google Patents.
US3378029A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nested ring valve
Assignee: ZF International UK Ltd
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Filing: 1965-11-23
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Granted: 1968-04-16
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Expires: 1985-11-23
Abstract
No abstract record available.
Inventors
- 👤 Lee Denis Ernest
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:54
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/24; A61F2/2421; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7838; Y10T137/7839; Y10T137/7841
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
159 words
A VALVE COMPRISING A PLURALITY OF NESTED RING-LIKE MEMBERS, OF DESCENDING SIZES, EACH MEMBER HAVING A GENERALLY V-SHAPED CROSS-SECTION TO DEFINE A CONCAVE EXTERNAL SURFACE AND A CONVEX INTERNAL SURFACE, SO THAT WHEN IN THE CLOSED POSITION, THE OUTER EDGE OF A SMALLER MEMBER IS IN SEALING ENGAGEMENT WITH THE CONVEX INTERNAL SURFACE OF AN ADJACENT LARGER MEMBER AND THE LARGEST MEMBER, WHICH IS ARRANGED TO BE SECURED IN AN ORIFICE IN A POSITION OF USE, HAS MEANS FOR PREVENTING THE OTHER MEMBERS MOVING BEYOND AN OPEN POSITION WHICH THEY OCCUPY IN RESPONSE TO THE APPLICATION OF FLUID PRESSURE ON ONE SIDE OF THE VALVE, IN WHICH POSITION THE MEMBERS ALL LIE IN SUBSTANTIALLY THE SAME PLANE, THE MEMBERS BEING ALSO CAPABLE OF OCCUPYING A CLOSED POSITION IN RESPONSE TO THE APPLICATION OF FLUID PRESSURE ON THE OTHER SIDE OF THE VALVE, IN WHICH POSITION THEY EXTEND OUTWARDLY OF ONE SIDE OF SAID PLANE IN A GENERALLY CONICAL FORMATION.
Claim 2
Dependent Claim
159 words
A VALVE COMPRISING A PLURALITY OF NESTED RING-LIKE MEMBERS, OF DESCENDING SIZES, EACH MEMBER HAVING A GENERALLY V-SHAPED CROSS-SECTION TO DEFINE A CONCAVE EXTERNAL SURFACE AND A CONVEX INTERNAL SURFACE, SO THAT WHEN IN THE CLOSED POSITION, THE OUTER EDGE OF A SMALLER MEMBER IS IN SEALING ENGAGEMENT WITH THE CONVEX INTERNAL SURFACE OF AN ADJACENT LARGER MEMBER AND THE LARGEST MEMBER, WHICH IS ARRANGED TO BE SECURED IN AN ORIFICE IN A POSITION OF USE, HAS MEANS FOR PREVENTING THE OTHER MEMBERS MOVING BEYOND AN OPEN POSITION WHICH THEY OCCUPY IN RESPONSE TO THE APPLICATION OF FLUID PRESSURE ON ONE SIDE OF THE VALVE, IN WHICH POSITION THE MEMBERS ALL LIE IN SUBSTANTIALLY THE SAME PLANE, THE MEMBERS BEING ALSO CAPABLE OF OCCUPYING A CLOSED POSITION IN RESPONSE TO THE APPLICATION OF FLUID PRESSURE ON THE OTHER SIDE OF THE VALVE, IN WHICH POSITION THEY EXTEND OUTWARDLY OF ONE SIDE OF SAID PLANE IN A GENERALLY CONICAL FORMATION.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-04-16 | 1971-10-16 | 1972-04-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-04-16 | 1975-10-16 | 1976-04-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-04-16 | 1979-10-16 | 1980-04-16 | $7700.00 | Window Closed / Lapsed |