Patent EP0152386A2 successfully refreshed from Google Patents.
EP0152386A2
Expired / Lapsed
EP
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Device in a vacuum transportation system for liquids, preferably a vacuum sewage system
Assignee: Wartsila Oy AB
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Filing: 1985-02-05
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Granted: —
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Expires: 2005-02-05
Abstract
Abstract The invention relates to a device in a vacuum transportation system for liquids, preferably a vacuum sewage system, comprising a transportation conduit (12) which is under vacuum and via a normally closed valve (13) and a suction pipe (14) connected to a liquid collecting container (10). The closing movement for the valve (13) is activated by the change in pressure which occurs when air entering after the liquid flows into the system.
Inventors
- 👤 Camiel Huisma
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 02:29
CPC Classifications
E; E03; E03F; E03F1/00; E03F1/006; Y; Y10; Y10T; Y10T137/00; Y10T137/2931; Y10T137/3109; Y10T137/7287; Y10T137/731; Y10T137/7313; Y10T137/7339; Y10T137/7358; Y10T137/7368; Y10T137/7371
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
67 words
A device in a vacuum transportation system for liquids, preferably a vacuum sewage system, comprising a transportation conduit which is under vacuum and via a normally closed valve and a suction pipe connected to a liquid collecting container, characterized in that the closing movement for the valve (13) is activated by the change in pressure which occurs when air entering after the liquid flows into the system.
Claim 2
Independent Claim
67 words
A device in a vacuum transportation system for liquids, preferably a vacuum sewage system, comprising a transportation conduit which is under vacuum and via a normally closed valve and a suction pipe connected to a liquid collecting container, characterized in that the closing movement for the valve (13) is activated by the change in pressure which occurs when air entering after the liquid flows into the system.
Claim 3
Dependent Claim
30 words
A device according to Claim 1, characterized in that the signal created by the said change in pressure is combined with a timing control delaying the closing of the valve.
Claim 4
Dependent Claim
67 words
A device according to Claim 1 or Claim 2, characterized in that the valve (12) via a connection (17,18,28,29) is connected to the vacuum conduit, said connection comprising a pilot valve (28,29) intended to direct vacuum and air of atmospheric pressure to the activating means of the valve, said pilot valve (28,29) being pneumatically and/or electrically connected to a means (19) for indicating the change in pressure.
Claim 5
Dependent Claim
70 words
A device according to Claim 1, characterized in that the means (19) indicating the change in pressure comprises a chamber (21), which via a hose (31) or the like is connected to the suction pipe (14) and is limited by a diaphragm (20) acting on a sealing (25) or the like which is able to close or open a connection between the vacuum conduit (12) and the said valve (13).
Claim 6
Dependent Claim
24 words
A device according to Claim 4, characterized in that the hose (31) is provided with a check valve (32) preventing flow towards the chamber.
Claim 7
Dependent Claim
49 words
A device according to Claim 4 or Claim 5, characterized in that the chamber (21) via an additional hose (33) or the like is connected to a so-called activator (34) which at a given level in the container transmits vacuum from the vacuum conduit (12) to the chamber (21).
Claim 8
Independent Claim
52 words
A device according to any of Claims 4 - 6, characterized in that the diaphragm (20) is provided with a spindle (24) supporting the said sealing (25), the diaphragm being under the action of a spring (23) which tends to close the connection between the vacuum conduit (12) and the valve (13).
References Cited (Backward Citations)
No citation records indexed.
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