Production method for cylinder device
AssigneeHitachi Astemo, Ltd.
InventorsShimpei TODA, Ryuichi YAMANAKA, Michinori NAKAYAMA, Daimu INOUE
Life of this patent
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Abstract
A production method for a cylinder device includes a first liquid injection step of injecting a first predetermined amount of working fluid L into the inner cylinder, a first piston rod insertion step of inserting an assembly between the piston rod and the piston into the inner cylinder to dispose the piston at a predetermined position inside the inner cylinder, a second liquid injection step of injecting a second predetermined amount of the working fluid into an upper side of the piston inside the inner cylinder, and a closing step of closing the opening of the outer cylinder with the closing member.
Claims5
A production method for a cylinder device that includes:
- an inner cylinder filled with a working fluid;
- a piston that divides an inside of the inner cylinder into two chambers;
- an outer cylinder that covers the inner cylinder, one end being closed and the other end being open;
- a piston rod that has one end connected to the piston and the other end protruding from the outer cylinder;
- a rod guide provided in each end portion of the inner cylinder and the outer cylinder to guide the piston rod, and
- an annular closing member that closes an opening in the other end of the outer cylinder,
- the production method comprising:
- a first liquid injection step of injecting a first predetermined amount of a working fluid into the inner cylinder;
- a first piston rod insertion step of inserting an assembly of the piston rod and the piston into the inner cylinder to dispose the piston at a predetermined position inside the inner cylinder;
- a second liquid injection step of injecting a second predetermined amount of the working fluid into an upper side of the piston inside the inner cylinder;
- and
- a closing step of closing the opening of the outer cylinder with the closing member.
Dependencies are inferred from the claim text.