US 4,070,772 A · Ground excavating apparatus

Abstract

Such a ground excavating apparatus that conducts excavation of a soft stratum by means of a bucket and employs an impact crusher for the excavation of such a hard stratum as a rock bed or the like is disclosed. Introduced in the present application is a ground excavator of such a category that comprises a housing, a bucket boom properly set in place in the said housing in a manner of being capable of traveling forward and rearward, a bucket properly fitted in place on the front end section of the said bucket boom in a manner of being capable of inclining, and an impact crushing mechanism well capable of traveling forward and rearward by virtue of a hydraulic jack housed in the said bucket boom, and employs the said bucket and the said impact crushing mechanism in an alternate manner to best suit the nature of the ground to be excavated.

Claims8

Dependent claims

A ground excavating apparatus comprising

a supporting member,
a bucket boom fitted on said supporting member such that it travels in the forward and rearward directions,
a bucket fitted on the top end section of the bucket boom such that it can be inclined with respect to the boom, said bucket having a plurality of flukes on the forward end thereof,
means for impact crushing housed in said bucket boom and capable of traveling in the forward and rearward directions,
primary means of operation positioned on said supporting member, for operating said bucket boom for causing it to travel forward and rearward,
secondary means of operation positioned on said bucket boom, for operating said means for impact crushing to cause it to travel forward and rearward, and
means of operation for inclination positioned on said bucket boom, for inclining said bucket.

4 more elements

Dependencies are inferred from the claim text.

Ground excavating apparatus

Life of this patent

Ground excavating apparatus

Life of this patent

Abstract

Claims8