Patent US4075796A successfully refreshed from Google Patents.
US4075796A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adjustable height manhole with locking means
Assignee: Individual
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Filing: 1977-03-25
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Granted: 1978-02-28
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Expires: 1997-03-25
Abstract
Abstract This manhole consists primarily of a cast and internally threaded main body, which receives a cast and internally threaded sleeve, which may be raised to different pavement levels by means of a removable spanner wrench. It includes a pair of diametrically opposed and slidable locking plates, which have pin means on the underside for being received within openings on the upper interior of the sleeve, and the upper portion of the plates projects outwards of the sleeve, so as to lock the sleeve and cover within the main body, thus preventing rotation thereof, the plates when the sleeve is lowered or elevated, serving as a means of rendering the sleeve and cover stationary at various pavement levels.
Inventors
- 👤 Benjamin D. Cuozzo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 12:03
CPC Classifications
E; E02; E02D; E02D29/00; E02D29/12; E02D29/14; E02D29/1409; E02D29/1427
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
182 words
An adjustable height manhole with locking means, comprising a hollow cylindrical and internally threaded main body having an annular base flange integral of the exterior of said main body, for supporting said main body within a ground opening, a hollow cylindrical, externally threaded sleeve rotatably received within said main body, providing adjustable elevation means for the top portion of said manhole, said sleeve having a cover removably received therein, said cover and said sleeve having adjacent openings removably receiving a spanner wrench, thus providing a means for raising and lowering said sleeve to various pavement levels, and said locking means comprising a pair of locking plates which are slidable in a pair of channel openings provided in said cover, said sleeve and said main body, so as to lock said cover and said sleeve against rotation within said main body at a first pavement level, said locking plates also including pin means integral therewith, which are removably received within opening means on the inner periphery of said sleeve, so as to lock and retain said cover in the top of said sleeve.
Claim 2
Dependent Claim
182 words
An adjustable height manhole with locking means, comprising a hollow cylindrical and internally threaded main body having an annular base flange integral of the exterior of said main body, for supporting said main body within a ground opening, a hollow cylindrical, externally threaded sleeve rotatably received within said main body, providing adjustable elevation means for the top portion of said manhole, said sleeve having a cover removably received therein, said cover and said sleeve having adjacent openings removably receiving a spanner wrench, thus providing a means for raising and lowering said sleeve to various pavement levels, and said locking means comprising a pair of locking plates which are slidable in a pair of channel openings provided in said cover, said sleeve and said main body, so as to lock said cover and said sleeve against rotation within said main body at a first pavement level, said locking plates also including pin means integral therewith, which are removably received within opening means on the inner periphery of said sleeve, so as to lock and retain said cover in the top of said sleeve.
Claim 3
Dependent Claim
124 words
The combination according to claim 1, wherein said sleeve is rotatably and telescoping received within said main body, said main body having its longitudinal axis in alignment with the longitudinal axis of said sleeve, and said base flange of said main body abuts with the top of the surface of the peripheral area adjacent of the said ground opening, thus supporting said main body and said sleeve within said ground opening, and said sleeve is rotated by means of a spanner wrench, the main body of said wrench having its ends receivable within said openings of said cover and said sleeve, and the handle of said wrench being pivotally secured by pin means at the center of the main body of said spanner wrench.
Claim 4
Dependent Claim
109 words
The combination according to claim 2, wherein said openings of said sleeve and said cover, which receive said spanner wrench, are diametrically opposed and comprise semi-cirular grooves in the outer periphery of said cover and the inner periphery of said sleeve, the said grooves, when aligned with one another, provide verticle openings receiving vertically extending engaging means on said spanner wrench, so as to rotate and elevate said sleeve and said cover simultaneously, and said openings receiving said ends of said main body of said spanner wrench are circular in cross-sectional configuration in the lower portions thereof, within said sleeve, the said openings formed by said grooves, being verticle.
Claim 5
Dependent Claim
94 words
The combination according to claim 3, wherein the upper end of said sleeve is provided with a recessed opening which seats said cover and said pair of channel openings are diametrically opposed to each other in said cover, said channels extending to the outer periphery of said cover and said channels include a pair of spaced apart shoulders therein, which support the outer underside surfaces of rectangular portions of said locking plates, the top surfaces of said rectangular portions being flush with said cover, the top surface of said sleeve and said pavement level.
Claim 6
Dependent Claim
170 words
The combination according to claim 4, wherein said locking plates, when urged outwards of the center of said cover, extend into said openings in the top surface of said sleeve, thus preventing the rotation of said cover in said sleeve, and an end portion of said rectangular portions of said locking plates extends to the outer periphery of said main body when said main body is in the lowest of said pavement levels and when said sleeve is elevated to a higher one of said pavement levels, said end portions extend into, and are flush with, said pavement level, thus rendering said sleeve stationary against rotation in said pavement, and a projection on the opposite ends of said rectangular portions of said locking plates, extending downwards in the upper portion of said sleeve, extends downwards through said channel openings, said projections having a side weld, extending outwards, which serves as stop means against the bottom of said channel openings, which prevents said locking plates from being removed from said cover.
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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) | 1981-02-27 | 1981-08-29 | 1982-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-02-27 | 1985-08-29 | 1986-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-02-27 | 1989-08-29 | 1990-02-28 | $7700.00 | Window Closed / Lapsed |