Invention Grant
- Patent Title: Propeller fan, fluid feeder, electric fan, and molding die
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Application No.: US14391412Application Date: 2013-04-09
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Publication No.: US09726190B2Publication Date: 2017-08-08
- Inventor: Yui Kumon , Masaki Ohtsuka
- Applicant: Sharp Kabushiki Kaisha
- Applicant Address: JP Sakai
- Assignee: Sharp Kabushiki Kaisha
- Current Assignee: Sharp Kabushiki Kaisha
- Current Assignee Address: JP Sakai
- Agency: Keating & Bennett, LLP
- Priority: JP2012-089281 20120410; JP2012-089283 20120410; JP2012-089284 20120410; JP2012-089286 20120410
- International Application: PCT/JP2013/060708 WO 20130409
- International Announcement: WO2013/154100 WO 20131017
- Main IPC: F04D19/00
- IPC: F04D19/00 ; F04D29/32 ; F04D29/38 ; F04D25/08

Abstract:
A propeller fan includes a boss hub portion and a blade including a front edge portion, a rear edge portion, and an outer edge portion. The outer edge portion has a front outer edge portion, a rear outer edge portion, and a connection portion connecting the front outer edge portion and the rear outer edge portion to each other. In a plan view of the blade along a central axis, a maximum radius R1max of the outer edge portion in a portion corresponding to the front outer edge portion and a maximum radius R2max of the outer edge portion in a portion corresponding to the rear outer edge portion satisfy a condition of R1max>R2max. With such a construction, a propeller fan which generates wind less in pressure fluctuation and is capable of sending comfortable wind and achieving lowering in noise is provided.
Public/Granted literature
- US20150125307A1 PROPELLER FAN, FLUID FEEDER, ELECTRIC FAN, AND MOLDING DIE Public/Granted day:2015-05-07
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