Patent ID: 6336280
Filing Date: 2002-01-08
Classification: E02F

Abstract:
An excavator comprising:a frame; a lateral telescopic boom assembly connected to the frame, said lateral telescopic boom assembly having a lateral telescopic stationary boom and a lateral telescopic extendable boom, said lateral telescopic extendable boom slidably connected to said lateral telescopic stationary boom; a vertical boom assembly having a vertical telescopic stationary boom and a vertical telescopic extendable boom, said vertical telescopic stationary boom pivotally connected to said lateral telescopic extendable boom, said vertical telescopic extendable boom slidably connected to said vertical telescopic stationary boom; a rotary cutting head assembly pivotally attached to an end of said vertical telescopic extendable boom, said rotary cutting head assembly having a rotary cutting head rotor; a lateral telescopic extendable boom hydraulic cylinder pivotally connected to the frame at one end and at the other end contacting said lateral telescopic stationary boom; a lateral telescopic extendable boom hydraulic cylinder connected at one end to said lateral telescopic stationary boom and at the other end to said lateral telescopic extendable boom; and a vertical telescopic boom hydraulic cylinder attached at one end to said vertical telescopic stationary boom and at another end to said vertical telescopic extendable boom.