Double containment under ground piping system
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jul 7, 1998
Issued Date -
N/A
app pub date -
Jan 3, 1997
filing date -
Dec 20, 1988
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A coaxial piping system connected between an underground pump and an above-ground liquid dispenser is used to provide containment of the pumped liquid from the underground piping system, preventing unintended release into the environment. A pair of coaxial pipes are removably connected to the underground pump at one end and to the dispenser at the other end using quick-disconnect fittings to allow for the replacement of the piping. A primary pipe for conveying gasoline or the like is surrounded by a secondary pipe, which provides containment in the event of leakage from the primary pipe. The piping system can be tested for leaks or replaced from grade without excavating at the installed tank site. A sensor in the annular space between the primary and secondary pipes may be used to detect leakage. A path may be provided for the gravity drainage of such leaks from the secondary pipe into a containment chamber, where the liquid may be detected and removed.
First Claim
Other Claims data not available