Method and apparatus for indicating effective digging depth of a backhoe

摘要: In a backhoe of the type having an outreach boom horizontally pivotally mounted relative to vehicle, downreach free end boom, and digging bucket apparatus is provided for respectively generating signals proportional angle between horizontal, line drawn teeth bucket. Such are combined according trigonometric equation provide continuous signal visual indication depth horizontal pivotal mounting axis on vehicle. accordance with modification, absolute elevation determined indicated by measuring reference plane defined rotating laser beam.