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:
Oct. 26, 1999
Filed:
Jul. 25, 1997
Applicant:
Inventors:
Terry L Briscoe, Portland, OR (US);
John S Kreitzberg, Portland, OR (US);
Assignee:
Esco Corporation, Portland, OR (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E02F / ; E02F / ; E02F / ; B61C / ;
U.S. Cl.
CPC ...
37396 ; 37395 ; 37397 ; 37398 ; 37399 ; 37401 ; 294 6827 ;
Abstract
An integral dump block for use in a dragline bucket that comprises a sheave to movably support a dump line, a central pin rotatably supporting the sheave, and a housing to couple the pin to lift lines. Bearings are disposed within the sheave and each side of the housing for receiving the pin for free rotation. Hoist lines for supporting a dragline bucket are connected to each end of the pin. In this way, moment forces in the hoisting assembly can be substantially eliminated. Further, a number of parts can be eliminated to provide a reduction in weight and height of the hoisting linkage assembly.