Waterproofing dams and the like
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
May 30, 1989
Grant Date -
N/A
app pub date -
Nov 23, 1987
filing date -
Nov 25, 1986
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A dam formed of roll-compacted concrete having an upstream side and a downstream side is provided with an impermeable membrane curtain. The curtain includes a vertical planar wall portion extending for the full depth of the dam and transversely for the full width of the dam. A series of vertical ribs are connected to and spaced transversely along the curtain. The ribs project toward the upstream side of the dam and extend for the full depth of the dam.
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Family
International Classification(s)
Cited Art Landscape
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