Cylinder apparatus

A cylinder apparatus comprising:

• a cylinder in which a fluid is sealed;
• a valve member fitted into the cylinder and configured to partition the inside of the cylinder into at least two chambers;
• a rod having one end extending to the outside of the cylinder;
• a flow path formed at the valve member and through which the fluid flows when the rod is moved;
• a valve configured to open and close the flow path;
• and
• a restriction member disposed at a side in a direction in which the flow path of the valve is opened,
• wherein the restriction member is a plate-shaped member, the restriction member includes:
• an attachment base section provided at an inner circumferential side of the restriction member;
• a plurality of spring sections extending in the radial direction from an outer circumferential side of the attachment base section and configured to bias the valve toward the valve member;
• and
• a stroke restriction section extending from between the neighboring spring sections in the radial direction from the outer circumferential side of the attachment base section and configured to restrict a further stroke of the valve when the valve has been moved a predetermined amount against the biasing force of the spring section;
• and
• the stroke restriction section has a rib.