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:
Aug. 03, 2021
Filed:
Aug. 29, 2019
Lenovo (Singapore) Pte. Ltd., Singapore, SG;
Ryota Watanabe, Kanagawa, JP;
Takuroh Kamimura, Kanagawa, JP;
Atsunobu Nakamura, Kanagawa, JP;
Akinori Uchino, Kanagawa, JP;
LENOVO (SINGAPORE) PTE LTD, Singapore, SG;
Abstract
A fan having reduced discrete tone noise is disclosed. The fan includes a fan chassis having an air inlet and an air outlet formed open at an outer surface of the fan chassis; an impeller part provided in the fan chassis; a wall part forming an air passage, the air passage is provided in the fan chassis to allow air to be introduced through the air inlet by rotation of the impeller part to flow to the air outlet; and a resonator having a cavity part communicating with said air passage through a communication passage passing through the wall part.