| 摘要 |
<p>947,502. Shovelling machines. DEVELOPMENT INDUSTRIAL PATENTS TRUST REG. Feb. 9, 1961 [Dec. 23, 1960], No. 4827/61. Heading E1F. In a shovel excavator the scoop 9 is pivotally mounted for rotation through approximately 90 degrees about a shaft 8 secured in the end of a Telescopic boom 3, 6, 7 at right angles to the longitudinal axis thereof. The boom is rotatably mounted in a support structure 2 pivotal about a horizontal axis 4 on and offset from the centre of a turntable 1 mounted on a selfpropelled chassis A.</p> |
