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:
Nov. 15, 1977
Filed:
Jul. 01, 1976
Applicant:
Inventor:
Aubrey C Briggs, Carnegie, PA (US);
Assignee:
Dravo Corporation, Pittsburgh, PA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B65G / ;
U.S. Cl.
CPC ...
198509 ; 198513 ; 198703 ; 214 / ;
Abstract
A pair of screw conveyors pivotally mounted on rotatable arms extending laterally from the extended ends of the bottom sprocket wheel shaft on a bucket ladder dislodge bulk material and direct it toward the buckets. The bottom sprocket wheels are journaled for rotation independent of the shaft which is rotated by a centrally located drive mechanism to position the rotatable arms and therefore the screw conveyors for various operations.