CARTRIDGE THAT PREVENTS NOZZLE FROM SLIPPING OFF
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United States of America Patent
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Issued Date -
Jan 19, 2017
app pub date -
Jul 11, 2016
filing date -
Jul 14, 2015
priority date (Note) -
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Abstract
A cartridge in which a pipe can be retained without increasing the number of components or suppressing pushing-out of a content. A length L over which the outer peripheral surface of a pipe and the inner peripheral surface of a through hole contact each other when the pipe is press-fitted into the through hole, an average outside diameter R of the pipe in the range of the length L over which the pipe is press-fitted into the through hole, and an average inside diameter N of the through hole in the range of the length L are determined to meet: L×R×π×(1−N/R)×3.3≧W and 0.01<(1−N/R)<0.1, wherein the maximum pushing load of the piston is defined as W and a grasping force to hold the pipe as the pipe is press-fitted into the through hole is defined as 1−N/R.
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