| 摘要 |
<p>This invention discloses a rocking lever for opening manhole covers, said lever comprising a primary arm (1) which is made up of a handle upper length (1 min ) substantially straight and of a lower length (1 sec ) whichis bent at the point close to its connection with said upper length and which is substantially straight at its lower end; a fulcrum (3) arranged below said primary arm (1) about at the point corresponding to said bent zone, a secondary rocking arm (5) which is coupled to the lower end of the primary arm (1) in a way that allows said secondary arm to oscillate; and a hook (7) that is carried by said secondary arm (5) at its lower portion. <IMAGE></p> |
