Gasket suitable for use in sealing exterior of sewer pipe to opening in manhole, and method and system employing same
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Apr 2, 1985
Grant Date -
N/A
app pub date -
Mar 7, 1983
filing date -
Mar 7, 1983
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A circular gasket for sealing the opening between the exterior of a sewer pipe and the interior periphery of an opening in a manhole, in which greater sealing pressure is provided by using a plurality of longitudinal openings extending entirely around the gasket through the head portion thereof which contacts the sewer pipe.
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International Classification(s)
- [Classification Symbol]
- [Patents Count]
Cited Art Landscape
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