Patent ID: 9567894
Date: 2017-02-14
CPC Classifications: F01P,F16K,Y10T

Claim:
1. A rotary valve comprising: a rotor which is rotated to open and close a flow passage; and a casing which accommodates the rotor, wherein a rotor opening, which is a part of a passage of a fluid, is formed in a cylindrical outer circumferential surface of the rotor, a rotor accommodating space, which rotatably accommodates the rotor, is formed in the casing, a casing opening, which provides a passage of the fluid when communicating with the rotor opening, is formed in an inner surface of the rotor accommodating space of the casing that faces the rotor, a cylindrical seal member, which extends to abut on an outer circumferential surface of the rotor, including the rotor opening, is provided in the casing opening, the cylindrical seal member includes a cylindrical body portion and a tip end abutting portion provided at a tip end portion of the body portion on a rotor side of the cylindrical seal member, the tip end abutting portion being integrated with the body portion toward the outer circumferential surface of the rotor and abutting on the outer circumferential surface of the rotor, the tip end abutting portion has a cylindrical shape and is curved along the outer circumferential surface of the rotor, the tip end abutting portion includes at least one of an inwardly curved portion that is curved inwardly toward a tip end side and is folded back in an approximately axial direction of the cylindrical body portion and an outwardly curved portion that is curved outwardly toward the tip end side and is folded back in the approximately axial direction of the cylindrical body portion, and the cylindrical seal member is disposed so that the at least one inwardly curved portion and outwardly curved portion is pressed against the outer circumferential surface of the rotor.