HYDRAULIC CYLINDER
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United States of America Patent
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Issued Date -
Apr 9, 2020
app pub date -
Feb 26, 2018
filing date -
May 8, 2017
priority date (Note) -
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status (Latency Note)
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Abstract
A hydraulic cylinder (10) comprises a cylinder tube (12) having a circular slide hole (13), a piston unit (18), and a piston rod (20). The piston unit (18) has a circular piston body (40), packing (42) that is installed on the outer circumferential portion of the piston body (40), a movable member (44) that is mounted to the outer circumferential portion of the piston body (40) so as to be able to rotate relative to the piston body (40), and a magnet (46) that is held by a magnet holding unit (58) of the movable member (44). Relative rotation of the movable member (44) with respect to the cylinder tube (12) is regulated.
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