| 摘要 |
<p>A demolition apparatus including a main chassis, first and second front arms pivotally connected to the main chassis and comprising first and second wheel assemblies, respectively, a rear telescoping arm fixedly connected to the main chassis and comprising a third wheel assembly, first, second and third boom sections and a telescoping catwalk assembly, the first and second boom sections interconnected by a first hydraulic cylinder and the second and third boom sections interconnected by a second hydraulic cylinder, the first and second hydraulic cylinders comprising first and second resistances to movement, respectively, and, an excavator assembly pivotally connected to the main chassis, wherein the first, second and third wheel assemblies comprise first, second and third hydraulic motors, respectively, the first, second and third hydraulic motors are balanced and adapted to rotate the first, second and third wheel assemblies at a common speed, the first and second hydraulic cylinders are balanced and adapted to selectably extend and retract according to the smaller of the first and second resistances at a time when a pressure change is directed to the first and second cylinders.</p> |
