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. 26, 2019
Filed:
Jun. 19, 2017
John Taylor, Hoover, AL (US);
Alex F. Farris, Iii, Birmingham, AL (US);
John Taylor, Hoover, AL (US);
Alex F. Farris, III, Birmingham, AL (US);
Other;
Abstract
A unidirectional annular labyrinth seal for a roller having an outer labyrinth seal and an inner labyrinth seal. The inner and outer seals have an annular outer wall, and an annular inner wall defining an interior and an interior surface. The interior of each seal has one or more annular middle walls and each has a central opening. The outer labyrinth seal and the inner labyrinth seal engage each other so that the outer walls, the inner walls, and the one or more middle walls cooperate to form a labyrinth in the unidirectional annular labyrinth seal. An annular interior seal is positioned in the interior of the outer labyrinth seal or in the interior of the inner labyrinth seal. The unidirectional annular labyrinth seal allows air to flow out of the roller but not into the roller.