Air blower
US-2015152875-A1 · Jun 4, 2015 · US
Propeller fan
US10508662B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10508662-B2 |
| Application number | US-201616072210-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jul 1, 2016 |
| Priority date | Jul 1, 2016 |
| Publication date | Dec 17, 2019 |
| Grant date | Dec 17, 2019 |
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- Title
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- Abstract
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- Assignees and inventors
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- First independent claim
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Abstract
Official abstract text for this publication.
A propeller fan includes a boss on a rotation axis, and a blade at an outer circumferential portion of the boss. The blade includes a leading edge and a trailing edge. The blade includes a first area, a second area inward of the first area, and third areas outward of the second area. The third areas are located inward and outward of the first area, with the first area interposed between the third areas. The first area, the second area and the third areas each include at least one notch in the trailing edge. The notches satisfy the relationship “P1>P2>P3”, where P1 is the width of the notch in the first area, P2 is the width of the notch in the second area, and P3 is the width of the notch in each of the third areas.
First claim
Opening claim text (preview).
The invention claimed is: 1. A propeller fan comprising: a boss provided on a rotation axis; and a blade provided at an outer circumferential portion of the boss, the blade including a leading edge and a trailing edge, wherein the blade has a first area, a second area located inward of the first area, and third areas located outward of the second area, the third areas being located inward and outward of the first area, with the first area interposed between the third areas, wherein each of the first area, the second area and the third areas includes at least one notch formed in the trailing edge, and wherein the relationship “P 1 >P 2 >P 3 ” is satisfied, where P 1 is a width of the at least one notch in the first area, P 2 is a width of the at least one notch in the second area, and P 3 is a width of the at least one notch in each of the third areas. 2. The propeller fan of claim 1 , wherein a sum of widths of the third areas in a radial direction is greater than or equal to a width of the first area in the radial direction. 3. The propeller fan of claim 1 , wherein the at least one notch is formed in a shape of a triangle. 4. The propeller fan of claim 1 , wherein each of the at least one notch has a depth equal to the width of the each of the at least one notch.
Assignees
Inventors
Classifications
by influencing the flow pattern, e.g. suppression of turbulence · CPC title
Sound attenuation · CPC title
- F04D29/666Primary
by means of rotor construction or layout, e.g. unequal distribution of blades or vanes · CPC title
damping or preventing mechanical vibrations · CPC title
related to the trailing edge of a rotor blade · CPC title
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Frequently asked questions
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- What does patent US10508662B2 cover?
- A propeller fan includes a boss on a rotation axis, and a blade at an outer circumferential portion of the boss. The blade includes a leading edge and a trailing edge. The blade includes a first area, a second area inward of the first area, and third areas outward of the second area. The third areas are located inward and outward of the first area, with the first area interposed between the thi…
- Who is the assignee on this patent?
- Mitsubishi Electric Corp
- What technology area does this patent fall under?
- Primary CPC classification F04D29/666. Mapped technology areas include Mechanical Engineering.
- When was this patent published?
- Publication date Tue Dec 17 2019 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 1 related publication on this page (citations in our corpus or others sharing the same primary CPC).