Patent US377082A successfully refreshed from Google Patents.
Patent US4067659A successfully refreshed from Google Patents.
US4067659A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manhole closure assembly
Assignee: Fosroc International Ltd
•
Filing: 1976-11-11
•
Granted: 1978-01-10
•
Expires: 1996-11-11
Abstract
Abstract Manhole closure assembly for preventing storm water from entering into manhole opening comprises cover section including downwardly depressed central portion. Circular mounting flange extends outwardly from depressed central portion and flange is adapted to rest upon inwardly directed manhole cover supporting flange of annular manhole frame. Downwardly depressed portion of cover section is depressed amount that exceeds path of spin of manhole cover resting upon supporting flange of annular manhole frame. First valve member is secured to cover section to relieve pressure inside manhole when pressure therein exceeds predetermined amount.
Inventors
- 👤 Samuel A. Campagna, Jr.
- 👤 Benjamin J. Campagna
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:12
CPC Classifications
E; E02; E02D; E02D29/00; E02D29/12; E02D29/14
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
172 words
A manhole closure assembly for preventing storm water from entering into a manhole opening in combination with an annular manhole frame and a manhole cover therefor, the closure assembly comprising a cover section including an outwardly extending circular mounting flange constructed and arranged to rest upon an inwardly directed manhole cover supporting flange of the annular manhole frame, the manhole cover normally resting upon the cover supporting flange of the annular manhole frame but having a path of spin into the manhole opening during manipulation of the cover, the cover section further including a downwardly depressed central portion extending into the manhole opening an amount that exceeds the path of spin of the manhole cover resting upon the supporting flange of the annular manhole frame whereby the depressed central portion is spaced from the path of cover spin at all locations along the surface thereof, and a first valve member secured to the cover section constructed and arranged to relieve pressure inside the manhole when the pressure therein exceeds a predetermined amount.
Claim 2
Dependent Claim
172 words
A manhole closure assembly for preventing storm water from entering into a manhole opening in combination with an annular manhole frame and a manhole cover therefor, the closure assembly comprising a cover section including an outwardly extending circular mounting flange constructed and arranged to rest upon an inwardly directed manhole cover supporting flange of the annular manhole frame, the manhole cover normally resting upon the cover supporting flange of the annular manhole frame but having a path of spin into the manhole opening during manipulation of the cover, the cover section further including a downwardly depressed central portion extending into the manhole opening an amount that exceeds the path of spin of the manhole cover resting upon the supporting flange of the annular manhole frame whereby the depressed central portion is spaced from the path of cover spin at all locations along the surface thereof, and a first valve member secured to the cover section constructed and arranged to relieve pressure inside the manhole when the pressure therein exceeds a predetermined amount.
Claim 3
Dependent Claim
35 words
A manhole closure assembly as in claim 1 including a second valve member secured to the cover section constructed and arranged to relieve vacuum inside a manhole when the vacuum therein exceeds a predetermined amount.
Claim 4
Dependent Claim
22 words
A manhole closure assembly as in claim 1 wherein the downwardly depressed central portion of the cover section is substantially dish shaped.
Claim 5
Dependent Claim
22 words
A manhole closure assembly as in claim 1 wherein the cover section is of unitary construction having a substantially uniform thickness throughout.
Claim 6
Dependent Claim
28 words
A manhole closure assembly as in claim 1 including sealing material on the upper and lower surfaces of the outwardly extending circular mounting flange of the cover section.
Claim 7
Dependent Claim
25 words
A manhole closure assembly as in claim 1 including handle means on the upper surface of the downwardly depressed central portion of the cover section.
Claim 8
Dependent Claim
42 words
A manhole closure assembly as in claim 1 wherein the cover section is of unitary construction having a substantially uniform thickness throughout, the cover section being substantially dish shaped with handle means on the upper surface of the depressed central portion thereof.
Claim 9
Dependent Claim
35 words
A manhole closure assembly as in claim 7 including a second valve member secured to the cover section constructed and arranged to relieve vacuum inside a manhole when the vacuum therein exceeds a predetermined amount.
Claim 10
Dependent Claim
21 words
A manhole closure assembly as in claim 1 wherein the downwardly depressed central portion of the cover section is substantially frusto-conical.
Claim 11
Dependent Claim
21 words
A manhole closure assembly as in claim 1 wherein the downwardly depressed central portion of the cover section is substantially cylindrical.
References Cited (Backward Citations)
US606554A
Cited
US1066316A
Cited
US2095024A
Cited
US2163221A
Cited
US3037631A
Cited
US3712009A
Cited
US3973856A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-01-09 | 1981-07-11 | 1982-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-01-09 | 1985-07-11 | 1986-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-01-09 | 1989-07-11 | 1990-01-10 | $7700.00 | Window Closed / Lapsed |