| 摘要 |
<p>The self-raising spade is designed to enable material to be moved from a low level and raised to a working height, without requiring the user to bend or stoop. The action does not require the user to take the weight of the load whilst in a bent posture, therefore reducing the risk of physical injury. The essential feature of this invention is the triangular support leg upon which the load rises to a selected height, this being brought about by the natural backwards motion of the user, the leg returning automatically towards the shaft on discharge of the spade towards the side.</p> |
