Hydraulic digger and crane has an integral rotary engine at the end of its arm and attached receptacle and digging attachments which swing on operating the motor

摘要

Hydraulic digger(1) and crane with integral rotary engine (4)at the end of its arm(2) and with attached receptacle (5)with built-on digging attachments (3) which swing on operating the engine. Here a hoe-type bucket attachment (3a) is shown. The receptacle can accept digging attachments by screwing, bolting or through a quick change device. Through the electric circuit of an electro-magnetic distributing valve, and with hydraulic wiring (6) to the hydraulic tank the hydraulic engine can be used in a freely swinging function thereby transforming the swingable digging attachment into an oscillating attachment.