| 摘要 |
In order to give appropriate back pressure to an orbiting-scroll during any operation, on one end side of a cylindrical thrust ring, there is provided a flange portion, and a movable range of the orbiting-scroll in an axial direction with respect to a regulation surface of a main frame is indirectly regulated through this flange portion, on the flange portion, there is provided a groove, and the groove is caused to communicate to a first back-pressure chamber at a low-pressure side. |
