Expansion joint for use in constructing concrete structures
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United States of America Patent
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-
Sep 3, 1991
Grant Date -
N/A
app pub date -
Dec 21, 1989
filing date -
Dec 29, 1988
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An expansion joint for use in constructing concrete material structures of the present invention has a plurality of sandwich type composite plates each comprising a sheet-like elastic body sandwiched by a pair of hard plates with a rib at both surfaces thereof are connected with each other through a water-swelling rubber.
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