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:
Apr. 18, 1989
Filed:
Jan. 29, 1987
Applicant:
Inventor:
Frank S Hyer, Duxbury, MA (US);
Assignee:
Hyer Industries, Inc., Pembroke, MA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H65B / ;
U.S. Cl.
CPC ...
141 83 ; 222 56 ; 198533 ; 141 72 ; 141256 ; 141255 ;
Abstract
A hopper-feeder system for feeding stored powders at a uniform, controllable and predetermined rate. A spiral convoluted stirring agitator in close proximity and conforming to the hopper wall is rotated in a direction tending to lift and dilate the powder, counteracting its tendency to bridge and to undergo intermittent or non-uniform changes in density and rate of discharge. The head load upon the feeder as well as the material damping effect on the feeder are controlled by a column cutter on the agitator that undercuts the column of powder extending through the hopper opening.