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:
Oct. 20, 2020
Filed:
Apr. 23, 2018
Applicant:
Evapco, Inc., Taneytown, MD (US);
Inventors:
Luigi Martini, Itú-SP, BR;
Daniel Strauss, Itú-SP, BR;
Ricardo de Araujo Pereira Andrade, Itú-SP, BR;
Assignee:
Evapco, Inc., Taneytown, MD (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F04D 29/32 (2006.01); F04D 19/00 (2006.01); F04D 29/34 (2006.01); F04D 29/38 (2006.01);
U.S. Cl.
CPC ...
F04D 29/329 (2013.01); F04D 19/002 (2013.01); F04D 29/34 (2013.01); F04D 29/38 (2013.01); F05D 2250/291 (2013.01); F05D 2260/31 (2013.01);
Abstract
A cooling tower fan hub having a ring and a disc in which in which hollows and recesses are opened in the ring and/or in the disc in order to decrease fan natural frequencies and avoid excitation by the several kind of loads that affect a fan during operation. The number, size and shape of the hollows can be adjusted to tune the fan natural frequencies around the original value.