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:
Nov. 30, 2021
Filed:
Dec. 05, 2018
Fujitsu General Limited, Kanagawa, JP;
Hirotaka Sawada, Kanagawa, JP;
Kazuya Funada, Kanagawa, JP;
FUJITSU GENERAL LIMITED, Kanagawa, JP;
Abstract
A propeller fan includes a hub and a plurality of blades, wherein the blade has a plurality of blade elements branching on a way from an outer peripheral portion to an inner peripheral portion, the plurality of blade elements form a hole which is a flow path for airflow, between the adjacent blade elements, have a first blade element on an upstream side and a second blade element on a downstream side to be adjacent to the first blade element which branch at a branch point, and include an extension portion as a part of the first blade element, on a trailing edge of the first blade element from the branch point to a side surface of the hub, and at least a part of a leading edge of the second blade element overlaps with a rotation orbit of the extension portion with a central axis as a rotation center.