| 摘要 |
<p>A hydraulic stepper motor comprising
three hydraulic ports (32) each coupled to a piston (34) that is actuatable between pressurised and depressurised configurations; and
a contoured cam surface (38) having at least one peak and trough and arranged to react against the pistons (34), the cam surface (38) coupled to an output shaft (40);
whereby actuation of one of the pistons (34) moves the cam surface until a trough reacts against one or more pressurised pistons (34).</p> |
