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:
Feb. 09, 2021
Filed:
Dec. 13, 2018
Pflow Industries, Inc., Milwaukee, WI (US);
Mark R. Webster, Hubertus, WI (US);
Pflow Industries, Inc., Milwaukee, WI (US);
Abstract
A vertical lift conveyor for lifting materials between different vertical levels. The vertical lift conveyor includes a pair of spaced uprights and a carriage that moves vertically along the spaced uprights. The vertical lift conveyor includes a drive assembly including a drive motor coupled to a drive shaft. Each end of the drive shaft includes a first sprocket and a second sprocket that each engages one of a pair of lift chains. The first and second sprockets each include a plurality of teeth (N). The first and second sprockets are offset from each other 180/N°. The offset between the first and sprockets creates sinusoidal velocity profiles for the two chains that are out of phase with each other. A connection block is used to connect the pair of lift chains to each side of the carriage combines the lift chain velocities into a linear vertical velocity for the carriage.