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:
Dec. 28, 1976
Filed:
May. 05, 1975
Mitsuo Yamaguchi, Tokyo, J;
Kaisuke Shiroyama, Tokyo, J;
The Furukawa Electric Co., Ltd., Tokyo, J;
Abstract
In a water jet type underwater ground excavator wherein an underwater pump portion is carried on an excavator body including stabilizer sleds, an excavation portion protrudes downwardly and rearwardly under the excavator body, and water is delivered from the underwater pump portion to the excavation portion and then ejected from jet nozzles of the excavation portion so as to excavate the ground under water, an improvement by a sinker arm erected at a free end of the excavation portion in a manner to ascend and descend with upward and downward motions of the free end, whereby the stability of the excavator is enhanced. By joining to the sinker arm a brake equipment which suppresses the ascent thereof, the stability of the excavator is enhanced.