US3629099A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Discharge device for a vacuum sewerage system
Assignee: Wartsila Oy AB
•
Filing: 1970-08-19
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Granted: 1971-12-21
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Expires: 1990-08-19
Abstract
Abstract A discharge device situated at the outlet end of a vacuum sewerage system and having an upper chamber and a lower chamber. The upper chamber is directly connected to a sewer and through a nonreturn valve to the lower chamber. The lower chamber has valve controlled passages leading to a vacuum source and to the open air and is further connected through a nonreturn valve to a sewage collecting tank.
Inventors
- 👤 Gustaf Gahmberg
- 👤 Reijo Olavi Peltonen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 00:48
CPC Classifications
E; E03; E03F; E03F1/00; E03F1/006
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
41 words
A sewerage system according to claim 1, in which said valve controlled passages are automatically governed by a regulating means providing with suitable time intervals an alternating connection of said lower chamber to said vacuum source and to the open air.
Claim 2
Dependent Claim
18 words
A sewerage system according to claim 2, in which said regulating means in influenced by a time-measuring device.
Claim 3
Dependent Claim
26 words
A sewerage system according to claim 2, in which said regulating means is influenced by a device measuring the quantity of sewage in said upper chamber.
Claim 4
Dependent Claim
25 words
A sewerage system according to claim 2, in which said regulating means is influenced by the operation of devices feeding sewage into said sewerage system.
Claim 5
Dependent Claim
18 words
A sewerage system according to claim 1, in which said collecting tank is an interchangeable and transportable container.
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) | 1974-12-20 | 1975-06-21 | 1975-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-20 | 1979-06-21 | 1979-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-20 | 1983-06-21 | 1983-12-21 | $7700.00 | Window Closed / Lapsed |