Filter device
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United States of America Patent
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Sep 21, 2004
Grant Date -
Jun 17, 2004
app pub date -
Jul 16, 2003
filing date -
Jul 16, 2002
priority date (Note) -
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status (Latency Note)
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Abstract
A filter device having a filter element arranged in a filter housing with a housing port closed by a housing cover with a housing ring. A medium to be purified is supplied to the filter element through an inlet in the filter housing. On the discharge side of the filter element, purified medium is discharged through an outlet in the filter housing. A pressure relief valve is integrated into the housing cover and is subjected to the pressure on the inlet side of the filter element. The housing cover is constructed in two parts and includes an inside cover and an outside cover. The pressure relief valve is mounted in the inside cover, which closes the housing port. A discharge path for discharging medium exhausted from the filter housing through the pressure relief valve is formed between the inside cover and the outside cover.
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