Filtering method and filter chamber sealing arrangement
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United States of America Patent
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Jan 25, 2005
Issued Date -
N/A
app pub date -
Dec 16, 2002
filing date -
Jul 16, 2001
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A liquid filter method includes use of a filter media belt enclosed by sealably mated cover pan and floor pan defining a vacuum chamber connected to a sealed clean liquid tank, with clean liquid pumped out continuously to draw liquid to be filtered into an upper region of the filter chamber via an inlet hose connected to a source of liquid to be filtered. The cover pan is lifted after the vacuum is relieved to allow indexing of the filter media belt. A main control valve to the clean liquid tank is closed and pumping liquid continues during indexing. A vacuum control device limits the maximum vacuum developed in the clean liquid tank and a vacuum pump removes air from the tank for priming and to eliminate excess accumulated air. A hose seal for the cover is mounted to the filter belt to be moved in and out by the belt movement, allowing cleaning of the seal. A double loop hose seal creates an intervening space into which liquid is directed to minimize air leaks.
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