Tube jetting apparatus
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United States of America Patent
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Jun 28, 1994
Issued Date -
N/A
app pub date -
Mar 22, 1993
filing date -
Sep 1, 1988
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A valve system for use with a tube jetting apparatus used for cleaning the interior surfaces of tubes such as those in heat exchangers. The apparatus includes a piston housing having a piston assembly slidably disposed therein. The pressure relief assembly also includes a differential pressure relief valve which is connected to the piston housing to relieve pressure therein as the piston moves within the housing.
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