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US3240133A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Locking riser ring for manhole covers
Assignee: Individual
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Filing: 1963-09-09
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Granted: 1966-03-15
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Expires: 1983-09-09
Abstract
No abstract record available.
Inventors
- 👤 Lawrence D Ross
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 08:31
CPC Classifications
E; E02; E02D; E02D29/00; E02D29/12; E02D29/14; E02D29/1409
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
163 words
THE COMBINATION WITH A MANHOLE CASTING HAVING AN INNER ANNULAR GROOVE DISPOSED ADJACENT TO THE UPPER EDGE OF THE CASTING, SAID UPPER EDGE LYING FLUSH WITH THE LEVEL OF THE STREET IN WHICH SAID CASTING IS PLACED; OF (A) A LOCKING RISER RING HAVING A DEPENDING ANNULAR FLANGE RECEIVED IN THE GROOVE IN SAID CASTING; (B) SAID RISER RING HAVING A PLURALITY OF OUTWARDLY EXTENDING AND SPACED APART LUGS, THE UPPER SURFACES OF SAID LUGS LYING BELOW THE TOP OF SAID RISER RING AND THE LOWER SURFACES OF SAID LUGS BEING SPACED ABOVE THE TOP OF SAID CASTING; (C) WHEREBY SAID LUGS WOULD BE EMBEDDED IN A SELFSETTING RESURFACING LAYER OF MATERIAL COVERING THE OLD STREET LEVEL THAT HAS ITS UPPER SURFACE LYING FLUSH WITH THE TOP OF SAID RISER SO THAT THE LUGS WILL BE COMPLETELY EMBEDDED IN SAID LAYER AND WILL ACT AS ANCHORS BETWEEN SAID RISER RING AND SAID LAYER FOR PREVENTING ANY ROTATION OF SAID RING ON SAID CASTING.
Claim 2
Dependent Claim
163 words
THE COMBINATION WITH A MANHOLE CASTING HAVING AN INNER ANNULAR GROOVE DISPOSED ADJACENT TO THE UPPER EDGE OF THE CASTING, SAID UPPER EDGE LYING FLUSH WITH THE LEVEL OF THE STREET IN WHICH SAID CASTING IS PLACED; OF (A) A LOCKING RISER RING HAVING A DEPENDING ANNULAR FLANGE RECEIVED IN THE GROOVE IN SAID CASTING; (B) SAID RISER RING HAVING A PLURALITY OF OUTWARDLY EXTENDING AND SPACED APART LUGS, THE UPPER SURFACES OF SAID LUGS LYING BELOW THE TOP OF SAID RISER RING AND THE LOWER SURFACES OF SAID LUGS BEING SPACED ABOVE THE TOP OF SAID CASTING; (C) WHEREBY SAID LUGS WOULD BE EMBEDDED IN A SELFSETTING RESURFACING LAYER OF MATERIAL COVERING THE OLD STREET LEVEL THAT HAS ITS UPPER SURFACE LYING FLUSH WITH THE TOP OF SAID RISER SO THAT THE LUGS WILL BE COMPLETELY EMBEDDED IN SAID LAYER AND WILL ACT AS ANCHORS BETWEEN SAID RISER RING AND SAID LAYER FOR PREVENTING ANY ROTATION OF SAID RING ON SAID CASTING.
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) | 1969-03-14 | 1969-09-13 | 1970-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-14 | 1973-09-13 | 1974-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-14 | 1977-09-13 | 1978-03-15 | $7700.00 | Window Closed / Lapsed |