Culvert of vacuum sewerage
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United States of America Patent
Stats
-
Mar 29, 1994
Grant Date -
N/A
app pub date -
Sep 14, 1992
filing date -
Feb 14, 1991
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An inverted siphon culvert of a vacuum sewerage in which a reduction in vacuum caused by a head at the time of passing under an obstacle such as a river is prevented. An upstream vacuum sewer 2 provided at one side of a river 1 and a downstream vacuum sewer 3 provided at the other side are connected by a water flow pipe 4 and an air pipe 5 passing under the river 1. Sewage water in the upstream vacuum sewer 2 flows into the downstream vacuum sewer 3 through the water flow pipe 4. The vacuum transmitted from a vacuum station to the downstream vacuum sewer 3 is transmitted to the upstream vacuum sewer 2 through the air pipe 5 without being reduced substantially.
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