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:
Jul. 24, 1990
Filed:
Jul. 13, 1989
Applicant:
Inventor:
Alexander W McDowell, Annapolis, MD (US);
Assignee:
Ellicott Machine Corporation, Baltimore, MD (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E02F / ;
U.S. Cl.
CPC ...
37 66 ; 37 68 ; 37 70 ; 37 94 ; 37189 ; 414723 ;
Abstract
A self-contained dredging module includes a unitary body adapted to be attached to the stick of conventional back hoe apparatus to convert it with minimum modification from dry land to sub-aqueous excavation. The body carries a dual cutter wheel, suction pump, and separate motors for driving the cutter wheel and the pump. The cutter wheel is arranged on the module in such a position that dredging is permitted when the stick is moved in one direction and also permitted when the stick and module are turned upside down and the stick is moved in the opposite direction.