Cylinder device and method of producing the same

A method of producing a cylinder device comprising:

• an inner cylinder configured to sealingly contain a functional fluid that changes in fluid properties due to an electric or magnetic field, the inner cylinder through which a rod extends;
• an intermediate cylinder disposed at an outer side of the inner cylinder, the intermediate cylinder being configured as an electrode tube or a magnetic pole tube;
• and
• flow-channel forming means that is disposed between the inner cylinder and the intermediate cylinder and that forms one or more flow channels through which the functional fluid flows from one axial end side toward the other axial end side in response to a back-and-forth movement of the rod, wherein
• the flow channel is a spiral or meandering flow channel including a portion extending in a circumferential direction;
• and
• the flow-channel forming means is attached to an outer peripheral side of the inner cylinder,
• the flow-channel forming means has a sectional shape in which a non-attached side is thinner in wall thickness than an attached side, the method including an insertion step of inserting the inner cylinder from a low pressure side of the inner cylinder into a high pressure-side opening of the intermediate cylinder.

A method of producing a cylinder device comprising:

• an inner cylinder configured to sealingly contain a functional fluid that changes in fluid properties due to an electric or magnetic field, the inner cylinder through which a rod extends;
• an intermediate cylinder disposed at an outer side of the inner cylinder, the intermediate cylinder being configured as an electrode tube or a magnetic pole tube;
• and
• flow-channel forming means that is disposed between the inner cylinder and the intermediate cylinder, and that forms one or more flow channels through which the functional fluid flows from one axial end side toward the other axial end side in response to a back-and-forth movement of the rod, wherein
• the flow channel is a spiral or meandering flow channel including a portion extending in a circumferential direction;
• and
• the flow-channel forming means is attached to an inner peripheral side of the intermediate cylinder,
• the flow-channel forming means has a sectional shape in which a non-attached side is thinner in wall thickness than an attached side, and
• the method includes an insertion step of inserting the inner cylinder from a high pressure side of the inner cylinder into a low pressure-side opening of the intermediate cylinder.