Cartridge piston with venting device
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United States of America Patent
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Issued Date -
Aug 12, 2010
app pub date -
Feb 9, 2010
filing date -
Feb 11, 2009
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
The cartridge piston includes a piston jacket and a venting device made as a cut-out and arranged at the piston jacket. Radial passages and one or more ring shaped passages in the surface of the piston that faces the media within a cartridge communicate with the cut-outs to vent air from the cartridge upon installation of the piston.
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