Piston arrangement
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United States of America Patent
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Dec 1, 2020
Grant Date -
Sep 7, 2017
app pub date -
Sep 4, 2015
filing date -
Sep 8, 2014
priority date (Note) -
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status (Latency Note)
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Abstract
A piston arrangement comprises a circumferential piston groove that can accommodate a seal for sealing between the piston and the cylinder bore when the piston moves in a reciprocal movement. The piston arrangement comprises a first fluid flow passage, defined at least in part by the piston body that fluidly connects the forward side of the cylinder bore with a space within the piston groove underneath the seal and a second fluid flow passage, defined in part by the piston body, which fluidly connects the rear side of the cylinder bore with the space within the piston groove underneath the seal. The two fluid flow passages allow a controlled fluid flow around the piston seal and comprise a channel provided in a lateral wall of the piston groove or an orifice provided in the piston body.
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