| 摘要 |
<p>A stick rake (10) has at least one elongated central frame ll having a leading end (12) and a trailing end (13), a means of supporting the or each frame above the ground which may be steered remotely, and a plurality of jump arms (14) pivotally secured upon the or each central frame (11) so as to maximise ground clearance beneath the or each frame (11) and each jump arm (14), which support a corresponding plurality of circular, rotatable pin-wheels (30) which may be raised or lowered independently or in combination to a desired height or depth, whilst the stick rake (10) is stationary or in operation, by a remotely located controller, each pin-wheel (30) has a plurality of pins or prongs (31) located around its circumference for raking debris when in use, and a means of conveyance.</p> |
