PRODUCTION METHOD FOR CYLINDER DEVICE

WIPO Patent Application WO/2020/217602

A1

A production method for a cylinder device having: an inner cylinder (2); a piston (35) that divides the inner cylinder (2) into two chambers; an outer cylinder (3A) that covers the inner cylinder (2); a piston rod (41) that is coupled to the piston (35) and protrudes from the outer cylinder (3A); a rod guide (21) that is provided at the end of the inner cylinder (2) and the outer cylinder (3A) and guides the piston rod (41); and an annular blocking member (33) that blocks an opening (13A) at the other end of the outer cylinder (3A). The production method for the cylinder device includes: a first fluid injection step in which a first prescribed amount of a hydraulic fluid L is injected inside the inner cylinder (2); a first piston rod insertion step in which an assembly (82) comprising the piston rod (41) and the piston (35) is inserted inside the inner cylinder (2) such that the piston (35) is arranged at a prescribed position inside the inner cylinder (2); a second fluid injection step in which a second prescribed amount of hydraulic fluid L is injected on the upper side of the piston (35) inside the inner cylinder (2); and a blocking step in which the opening (13A) of the outer cylinder (3A) is blocked by the blocking member (33).

TODA SHIMPEI (JP)
YAMANAKA RYUICHI (JP)
NAKAYAMA MICHINORI (JP)
INOUE DAIMU (JP)

PCT/JP2020/001025

October 29, 2020

January 15, 2020

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HITACHI AUTOMOTIVE SYSTEMS LTD (JP)

F16F9/32; F16F9/43

JP2013113402A	2013-06-10
JPH0674278A	1994-03-15
JP2002081481A	2002-03-22

SHIGA INTERNATIONAL PATENT OFFICE (JP)

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