US3611889A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manhole extension
Assignee: INT Manufacturing CO
•
Filing: 1970-06-19
•
Granted: 1971-10-12
•
Expires: 1990-06-19
Abstract
Abstract A manhole cover holder extension mountable in any one of several vertically adjustable positions in a manhole cover holder for holding a manhole cover in a raised position upon the raising of the top surface of a road by the adding of a top layer of asphalt or the like over the top surface of the original road.
Inventors
- 👤 Louis E Levinson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:56
CPC Classifications
E; E02; E02D; E02D29/00; E02D29/12; E02D29/14; E02D29/1409
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
189 words
An extension for a manhole cover holder, the holder having an internal annular upwardly facing support surface on which peripheral portions of a circular manhole cover are adapted to rest to support the top surface of the cover at substantially the plane of the top surface of road, said extension including: a cylindrical body telescopical through a manhole cover holder and having a plurality of sets of circumferentially and vertically spaced apertures; support means securable by means of said apertures of said cylindrical body in vertically adjustable locations thereon by means of connector means extending through selected ones of said apertures of said sets, said support means being engageable with the support means of the holder for holding said tubular body against downward movement in said holder, said body having an external annular horizontal flange at its upper portion providing an annular upwardly facing support surface and a peripheral vertical flange extending upwardly from said horizontal flange, said horizontal flange providing an upwardly facing annular support surface engageable by peripheral portions of the bottom surface of a manHole cover telescopical in said vertical flange for supporting the manhole cover.
Claim 2
Dependent Claim
189 words
An extension for a manhole cover holder, the holder having an internal annular upwardly facing support surface on which peripheral portions of a circular manhole cover are adapted to rest to support the top surface of the cover at substantially the plane of the top surface of road, said extension including: a cylindrical body telescopical through a manhole cover holder and having a plurality of sets of circumferentially and vertically spaced apertures; support means securable by means of said apertures of said cylindrical body in vertically adjustable locations thereon by means of connector means extending through selected ones of said apertures of said sets, said support means being engageable with the support means of the holder for holding said tubular body against downward movement in said holder, said body having an external annular horizontal flange at its upper portion providing an annular upwardly facing support surface and a peripheral vertical flange extending upwardly from said horizontal flange, said horizontal flange providing an upwardly facing annular support surface engageable by peripheral portions of the bottom surface of a manHole cover telescopical in said vertical flange for supporting the manhole cover.
Claim 3
Dependent Claim
31 words
The extension of claim 1, and retainer means securable to said cylindrical body and extendable outwardly thereof for engaging said holder to limit upward movement of said extension in said holder.
Claim 4
Dependent Claim
37 words
The extension of said claim 2, wherein said support means comprises a plurality of angle brackets each having a vertical portion abutting the external surface of said cylindrical body and a bottom horizontal flange extending outwardly therefrom.
Claim 5
Dependent Claim
24 words
The extension of claim 3, said connecting means comprising bolts extendable through said apertures and aligned apertures provided said vertical portions of said brackets.
Claim 6
Dependent Claim
47 words
The extension of claim 4, wherein said retainer means comprises a plurality of sets of vertically spaced openings provided in said cylindrical body and means extendable through said openings to extend outwardly of said cylindrical body and spaced below said horizontal bottom flanges of said support brackets.
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) | 1974-10-11 | 1975-04-12 | 1975-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-11 | 1979-04-12 | 1979-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-11 | 1983-04-12 | 1983-10-12 | $7700.00 | Window Closed / Lapsed |