| 摘要 |
PURPOSE:To permit multiple stage speed change of output rotational frequency by providing communicating holes respectively radially outward and inward of a fine gap formed between a drive member and a partition plate and opening only the outside communicating hole after opening only the inside one. CONSTITUTION:An output side outer housing 3 rotatably supported through a bearing 2 on an input side drive shaft 1 is divided by a partition plate 6 into a storage chamber 4 and a work chamber 5 which communicate to each other through an inside communicating hole 8 and an outside communicating hole 7 in fine gaps 10. 11 formed between the drive member 12 and the partition plate 6. The opening and closing of these holes 7. 8 are controlled by a valve plate 9 to open first only the inside communicating hole 8 and then only the outside communicating hole 7. |
