Apparatus for forming inverts and manhole assemblies and the like utilizing adjustable invert forming members joined with an intermediate flexible portion
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United States of America Patent
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Jul 17, 1990
Grant Date -
N/A
app pub date -
Jan 26, 1989
filing date -
Jan 26, 1989
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Apparatus for forming inverts in a manhole base comprising at least one adjustably positionable channel-forming member for forming an invert which communicates between associated sidewall openings of a manhole base. Flexible members join the ends of the invert form. The adjustability of the channel-forming assembly extends over a range of angles which are both greater than and less than 180 degrees.
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Cited Art Landscape
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