| 摘要 |
<p>A motor speed controller (1) for a pressure fluid-operated motor having a controller body (26) with generally frustoconical cap (35), rotatable in proportion to the speed of rotation of the motor, the cap housing balls (30) which act centrifugally to cause axial translation of a controller stem (32). The cap (35) is surrounded by a housing (20), which co-operate with one another to provide a face seal valve and protects the controller against entry of particulate matter.</p> |
