Filter device
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United States of America Patent
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Mar 20, 2018
Issued Date -
N/A
app pub date -
Nov 12, 2015
filing date -
Jun 24, 2009
priority date (Note) -
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status (Latency Note)
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Abstract
A filter device may include a filter housing cover defining a chamber and an annular filter element arranged within the receiving chamber. The filter device may further include a housing and at least one intermediate piece arranged between the filter housing cover and the housing when the cover is secured to the housing. An inlet duct may be in communication with an untreated side of the filter element and an outlet duct may be in communication with a clean side of the filter element. A drainage duct may be arranged in the housing for draining the chamber during removal of the cover. A closure device may be arrange in the intermediate piece and have a closure element configured to close the drainage duct.
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