US Patent 11162601 Valve device

A valve device includes a housing, a valve, a partition wall, and a seal member. The partition wall is fit into the housing. The housing includes a first cylindrical inner wall, a second cylindrical inner wall, and a third inner wall. The second cylindrical inner wall is tapered from the third inner wall to the first cylindrical inner wall and the third inner wall defines a housing through hole. The partition wall defines a partition wall through hole that extends in the radial direction and that overlaps with both the first cylindrical inner wall and the second cylindrical inner wall in the radial direction. An annular space that is in communication with both the partition wall through hole and the housing through hole is defined between the second cylindrical inner wall and the outer wall of the partition wall.