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:
Mar. 28, 2017
Filed:
Nov. 03, 2011
Cary Pinkalla, Fox Point, WI (US);
Frank Heim, Platteville, WI (US);
Kevin J. Gebke, Dubuque, IA (US);
Nicholas L. Kaufmann, Sherill, IA (US);
William A. Niehaus, Holy Cross, IA (US);
Cary Pinkalla, Fox Point, WI (US);
Frank Heim, Platteville, WI (US);
Kevin J. Gebke, Dubuque, IA (US);
Nicholas L. Kaufmann, Sherill, IA (US);
William A. Niehaus, Holy Cross, IA (US);
RITE-HITE HOLDING CORPORATION, Milwaukee, WI (US);
Abstract
Pliable-wall air ducts with internal expanding structures are disclosed. An example air duct system includes a shaft to be disposed within an air duct, to extend in a longitudinal direction, and to be in longitudinal compression. The air duct system also includes a plurality of ribs to be coupled to the shaft and to engage an inner surface of the air duct and a spring to be disposed within the air duct, the spring to be coupled to the shaft. The spring under stress being a contributing factor in both the shaft being in longitudinal compression and the air duct being in longitudinal tension.