Abstract: There is provided an engagement groove (31) which is formed in a first shoe (S1) of first to fourth shoes (S1), (S2), (S3), (S4) at a circumference position at which the engagement groove (31) is not overlapped an abutment surface (30) with a first vane (V1), which includes a pair of side surfaces (31a) and (31a) that are substantially parallel to the abutment surface (30), and with which a positioning pin (19) protruding from a sprocket (13) is engaged, so as to match phases of a housing main body (11) and the sprocket (13) in a rotation direction.

Abstract: A front plate 26 that covers a front end of a housing body is formed from a disk-shaped plate member 41 having in a middle thereof a fitting hole 41a and a cylindrical member 42 having at inner end part thereof a reduced diameter stepped-shaped fitting portion 42a that is fitted to the fitting hole 41a. Stopper portions 44 are formed by crimping a top end side of the fitting portion 42a fitted to the fitting hole 41a, and both of the plate member 41 and the cylindrical member 42 are connected and fixed together by the stopper portions 44 engaging with stopper grooves 43 that are formed at an inner end side hole edge of the fitting hole 41a in a pressed state.

Abstract: A front plate 26 that covers a front end of a housing body is formed from a disk-shaped plate member 41 having in a middle thereof a fitting hole 41a and a cylindrical member 42 having at inner end part thereof a reduced diameter stepped-shaped fitting portion 42a that is fitted to the fitting hole 41a. Stopper portions 44 are formed by crimping a top end side of the fitting portion 42a fitted to the fitting hole 41a, and both of the plate member 41 and the cylindrical member 42 are connected and fixed together by the stopper portions 44 engaging with stopper grooves 43 that are formed at an inner end side hole edge of the fitting hole 41a in a pressed state.