| 摘要 |
A training device comprises at least one wheel rotatable by the training, a fluid pump (4) connected to the wheel and drivable thereby and valve means on the pressure side of the pump for controlling the resistance executed by the fluid pump to rotation of the wheel. Said valve means comprise a pressure restriction valve (6) of automatically operating constant pressure type, i.e. a valve to maintain a generally constant pressure on the pressure side of the fluid pump independently, at least within a certain pump speed range, of the operational speed and thereby flow of the fluid pump. <IMAGE> |
