| 摘要 |
A fluid-powered device having a body with interior helical grooves, an output shaft with exterior helical grooves, a plurality of rollers having circumferential grooves, and an axially reciprocating piston sleeve mounted within the body and retaining the rollers in axially offset and nested relation to each other and in fixed axial and circumferential position relative to the piston sleeve during powered operation of the device. The rollers are retained by the sleeve portion of the piston sleeve in circumferentially distributed arrangement between the grooved body and shaft surface portion in seated engagement with the grooved body and in seated engagement with the grooved output shaft for transmitting force between the body, output shaft and piston sleeve.
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