US3654952A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manhole setup for sewer systems
Assignee: Individual
•
Filing: 1970-11-24
•
Granted: 1972-04-11
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Expires: 1990-11-24
Abstract
Abstract A manhole setup is provided for sewer systems which consists of at least two connecting points for an inlet and/or an outlet by means of subsequent pipe connecting adapters, such as clay pipes, Manhole rings are mountable on the manhole setup which are characterized in that the manhole setup and wall parts have vertical subdivision. The wall parts are subdivided in wall segments, each having arch length with graduated radians.
Inventors
- 👤 Harald O Howe
- 👤 Wolfgang Zaschke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:35
CPC Classifications
E; E03; E03F; E03F5/00; E03F5/02; Y; Y10; Y10T; Y10T137/00; Y10T137/6851; Y10T137/6966; Y10T137/6991
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
63 words
A manhole setup for sewer systems having at least two connecting points for inlet and/or outlet by means of subsequent pipe connecting adapters, such as clay pipes, with manhole rings being mountable on the manhole setup, said manhole setup consisting of connecting segments and wall parts with vertical subdivision, said wall parts being subdivided in wall segments having arch length with graduated radians.
Claim 2
Dependent Claim
63 words
A manhole setup for sewer systems having at least two connecting points for inlet and/or outlet by means of subsequent pipe connecting adapters, such as clay pipes, with manhole rings being mountable on the manhole setup, said manhole setup consisting of connecting segments and wall parts with vertical subdivision, said wall parts being subdivided in wall segments having arch length with graduated radians.
Claim 3
Dependent Claim
50 words
A manhole setup as recited in claim 1, wherein the connecting segments consist of arch sections of concrete of the like, a socket of stoneware, concrete, asbestos-cement, cast iron, plastics or the like, embedded in said arch sections, with said arch sections having lateral contact faces which are radially limited.
Claim 4
Dependent Claim
28 words
A manhole setup as recited in claim 1 wherein each said socket embedded in its respective arch section is flush with the inner wall of the connecting segment.
Claim 5
Dependent Claim
21 words
A manhole setup as recited in claim 1, wherein the outer bow of the wall segments corresponds to the inner bow.
Claim 6
Dependent Claim
42 words
A manhole setup as recited in claim 1, wherein the wall and connecting segments are divided in different lengths of radians so that with a minimum of different radians, there exist different angles of connections in graduations of 10* and the like.
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) | 1975-04-11 | 1975-10-11 | 1976-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-11 | 1979-10-11 | 1980-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-11 | 1983-10-11 | 1984-04-11 | $7700.00 | Window Closed / Lapsed |