US3853138A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for conveying liquid through a long conduit
Assignee: Wartsila Oy AB
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Filing: 1973-04-25
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Granted: 1974-12-10
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Expires: 1993-04-25
Abstract
Abstract An arrangement and method for conveying liquid by vacuum, such as sewage, through long conduits without intermediate stations having vacuum generating means. The arrangement results in an efficient liquid transport in conduits of considerable length and also in installations where there is a considerable difference in height of parts of the liquid flow path.
Inventors
- 👤 J Amren
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 13:58
CPC Classifications
F; F04; F04F; F04F3/00; E; E03; E03F; E03F1/00; E03F1/006; F04F1/00; F04F1/18; Y; Y10; Y10T; Y10T137/00; Y10T137/0318; Y10T137/2931; Y10T137/3109
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
203 words
In an apparatus for conducting liquid from a collecting receptacle to a long conduit and including a source of vacuum comprising: a liquid collecting receptacle, means for supplying a mixture of air and liquid to said receptacle, said conduit having an inlet portion connected to the bottom of said collecting receptacle and extending below the plane of said bottom, said conduit having an outlet portion provided with an upwardly sloping section through which the liquid flows by means of said vacuum, an air-conducting shunt pipe located above the inlet portion and connecting the upper part of said receptacle to said upwardly sloping section, the opposite ends of said shunt pipe being positioned at substantially the same level, said shunt pipe being provided with a valve, control means for said valve, said valve being open in the idle position of said apparatus thereby permitting the air to flow through the shunt pipe and collecting the liquid in the receptacle, and at least one liquid level sensing means in said receptacle to operate said control means for opening and closing said valve, said liquid in the collecting receptacle being mixed with air and conveyed through the conduit when the valve is in the closed position.
Claim 2
Dependent Claim
203 words
In an apparatus for conducting liquid from a collecting receptacle to a long conduit and including a source of vacuum comprising: a liquid collecting receptacle, means for supplying a mixture of air and liquid to said receptacle, said conduit having an inlet portion connected to the bottom of said collecting receptacle and extending below the plane of said bottom, said conduit having an outlet portion provided with an upwardly sloping section through which the liquid flows by means of said vacuum, an air-conducting shunt pipe located above the inlet portion and connecting the upper part of said receptacle to said upwardly sloping section, the opposite ends of said shunt pipe being positioned at substantially the same level, said shunt pipe being provided with a valve, control means for said valve, said valve being open in the idle position of said apparatus thereby permitting the air to flow through the shunt pipe and collecting the liquid in the receptacle, and at least one liquid level sensing means in said receptacle to operate said control means for opening and closing said valve, said liquid in the collecting receptacle being mixed with air and conveyed through the conduit when the valve is in the closed position.
Claim 3
Dependent Claim
203 words
In an apparatus for conducting liquid from a collecting receptacle to a long conduit and including a source of vacuum comprising: a liquid collecting receptacle, means for supplying a mixture of air and liquid to said receptacle, said conduit having an inlet portion connected to the bottom of said collecting receptacle and extending below the plane of said bottom, said conduit having an outlet portion provided with an upwardly sloping section through which the liquid flows by means of said vacuum, an air-conducting shunt pipe located above the inlet portion and connecting the upper part of said receptacle to said upwardly sloping section, the opposite ends of said shunt pipe being positioned at substantially the same level, said shunt pipe being provided with a valve, control means for said valve, said valve being open in the idle position of said apparatus thereby permitting the air to flow through the shunt pipe and collecting the liquid in the receptacle, and at least one liquid level sensing means in said receptacle to operate said control means for opening and closing said valve, said liquid in the collecting receptacle being mixed with air and conveyed through the conduit when the valve is in the closed position.
Claim 4
Dependent Claim
203 words
In an apparatus for conducting liquid from a collecting receptacle to a long conduit and including a source of vacuum comprising: a liquid collecting receptacle, means for supplying a mixture of air and liquid to said receptacle, said conduit having an inlet portion connected to the bottom of said collecting receptacle and extending below the plane of said bottom, said conduit having an outlet portion provided with an upwardly sloping section through which the liquid flows by means of said vacuum, an air-conducting shunt pipe located above the inlet portion and connecting the upper part of said receptacle to said upwardly sloping section, the opposite ends of said shunt pipe being positioned at substantially the same level, said shunt pipe being provided with a valve, control means for said valve, said valve being open in the idle position of said apparatus thereby permitting the air to flow through the shunt pipe and collecting the liquid in the receptacle, and at least one liquid level sensing means in said receptacle to operate said control means for opening and closing said valve, said liquid in the collecting receptacle being mixed with air and conveyed through the conduit when the valve is in the closed position.
Claim 5
Dependent Claim
41 words
The apparatus as claimed in claim 1 wherein two liquid level sensing means are provided in the receptacle, one of said means being located in the bottom of the receptacle and the other means being positioned adjacent to the top thereof.
Claim 6
Dependent Claim
77 words
The apparatus as claimed in claim 1 further comprising means connecting the control means to the normally open valve and to the liquid level sensing means, said control means being provided with additional valve means to admit air to the receptacle and to the outlet portion of the long conduit when the normally open valve is closed under the action of the liquid level Sensing means when a given liquid level has been reached in the receptacle.
Claim 7
Dependent Claim
44 words
The apparatus as claimed in claim 3 wherein said control means is provided with an adjustable timing device means for determining the time period during which the normally open valve is closed and the continued transport of the collected liquid in the long conduit.
Claim 8
Dependent Claim
34 words
The method as claimed in claim 5 further supplying atmospheric air to the liquid to create a pressure difference in the system that effects a continued transport of the collected liquid through said conduit.
Claim 9
Dependent Claim
30 words
The method as claimed in claim 5 wherein said collecting receptacle where the air is separated from the liquid is immediately ahead of an upwardly sloping part of the conduit.
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) | 1977-12-09 | 1978-06-10 | 1978-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-09 | 1982-06-10 | 1982-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-09 | 1986-06-10 | 1986-12-10 | $7700.00 | Window Closed / Lapsed |