The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 03, 1995
Filed:
Oct. 19, 1993
Mitsuhiro Kishi, Ashikaga, JP;
Japanic Corporation, Ashikaga, JP;
Abstract
A deep excavator comprising a stretchable arm arrangement having four telescopically assembled alms which are simultaneously extended and contracted for excavating earth or sand to form a deep hole. The stretchable arm arrangement houses therein a working unit comprising a pair of hydraulic cylinders which are arranged in parallel with each other while the cylinder rods thereof are disposed to operate in opposite directions and the hydraulic cylinder housings are assembled so as to relatively slide. The cylinder rods and the cylinder housings are individually coupled each to a respective arm whereby the arms are interlocked with the hydraulic cylinders so as to be extended simultaneously with the hydraulic cylinders when both of the hydraulic cylinders are extended.