Cartridge and piston with ventilation device
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United States of America Patent
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Mar 25, 2014
Grant Date -
Apr 21, 2011
app pub date -
Mar 26, 2009
filing date -
Mar 26, 2008
priority date (Note) -
In Force
status (Latency Note)
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Abstract
The present invention relates to a cartridge for holding liquid, paste-like or powdered compounds and a piston for closing such a cartridge, and a system made up of such a cartridge, comprising a tool (15), wherein the piston comprises a cylindrical or cylindrical tube-like base member that can be placed into a cartridge and moved along the cylindrical longitudinal axis inside a cartridge, wherein at least one sealing lip (12) is provided that seals against a sealing surface running parallel to or at an acute angle with respect to the cylindrical longitudinal axis, wherein the sealing lip is arranged such that by way of a tool that can be accessed from an end side of the piston, the sealing lip can be lifted off the sealing surface when the cartridge is closed by the piston so that air can escape from the cartridge.
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