Patent attributes
Axial grooves 8e and circumferential groove 8f intersecting with he axial grooves are provided in a cylinder bore 8e. A fixed-side cam plate 12 has anti-rotation projections 12c, which are projected from the fixed-side cam plate 12 and inserted into the axial grooves 8e, and fastening grooves 12d, which are formed at circumferential areas of the bottom side of the fixed-side cam plate 12 at a circumferential side of each of anti-rotation projections 12c. The housing 16 has engagement ribs 16e which are projected from the housing 16 to be engaged with the axial grooves 8e, and fastening pieces 12f, which are formed at a circumferential side of each of the engagement ribs 16e, the fastening pieces 12f being fitted in the fastening grooves 12d.
