EXCAVATOR Russian patent published in 2008 - IPC E02F3/39 

FIELD: mechanics; construction equipment.

SUBSTANCE: said invention relates to earth excavation and handling by means of hydraulically-actuated telescopic boom equipment. The excavator incorporates chassis (1), which supports main structure (2) with telescopic boom (3), head section (4) of which is interlocked with the main structure (2), while the tail section (5) is interlocked with the bucket (6). Boom raising and lowering mechanism (3) has a three-port lever (10), pivoted on the main structure (2), and a hydraulic cylinder (12), which provides for turning thereof as regards to the main structure (2). Arm a of lever (10) is pivoted with the cylinder of hydrocylinder (7), shaft (8) of which is linked to the head section (4) of boom (3). The head section (4) of boom (3) is interlocked with the main structure (2) by means of the second arm b of lever (10).

EFFECT: operating enhancement of the excavator.

2 cl, 3 dwg