Fluid control valve, and valve timing adjusting device employing same

A fluid control valve configured to control flow of fluid supplied from a fluid supply source to a fluid supply destination, comprising:

• an outer tubular portion;
• an inner tubular portion that is located at an inside of the outer tubular portion;
• an axial flow passage that is located between the outer tubular portion and the inner tubular portion and extends in an axial direction of the outer tubular portion and the inner tubular portion such that the axial flow passage conducts the fluid that flows from the fluid supply source to the fluid supply destination;
• an annular flow passage that is located between the outer tubular portion and the inner tubular portion and is shaped in an annular form to extend in a circumferential direction of the outer tubular portion and the inner tubular portion while the annular flow passage is connected to the axial flow passage;
• a valve seat surface that is shaped in a cylindrical form and is formed at the inner tubular portion in the annular flow passage;
• a valve seat flow passage that communicates between the valve seat surface and an inside of the inner tubular portion;
• a check valve that is made of a resilient body wound in a ring form and is radially located between the outer tubular portion and the inner tubular portion in the annular flow passage, wherein the check valve is placed in a valve opening state to enable flow of the fluid from the valve seat flow passage to the annular flow passage when a diameter of the check valve is increased in a diameter increasing direction to lift the check valve away from the valve seat surface, and the check valve is placed in a valve closing state to limit flow of the fluid from the annular flow passage to the valve seat flow passage when the diameter of the check valve is decreased to seat the check valve against the valve seat surface;
• and
• a displacement limiter that includes:
• a limiter main body that is formed separately from the outer tubular portion and the inner tubular portion, wherein the limiter main body is located on an outer side of the check valve in the annular flow passage and is configured to limit displacement of the check valve in the diameter increasing direction of the check valve;
• and
• a limiter flow passage that communicates between one side and another side of the limiter main body in the axial direction of the outer tubular portion and the inner tubular portion to enable the fluid to flow between the one side and the another side of the limiter main body through the limiter flow passage.