Pipe or the like, a female end ring, and a method of manufacturing such a pipe or the like
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Feb 15, 2005
Grant Date -
Aug 1, 2002
app pub date -
Dec 21, 2001
filing date -
Dec 22, 2000
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A pipe formed from a concrete cylinder has an end ring with a ferrule which can be snuggly mounted on one end of the pipe and a skirt axially adjacent to the ferrule for receiving a mail endpiece of another pipe. The ferrule is expanded as it is mounted on the cylinder and exerts a compressive force against the outer peripheral face of the cylinder for forming a secure seal. A rib may be disposed on an inner annular surface of the ferrule and an adhesive may be applied for enhancing the seal between the cylinder and the ferrule.
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