Patent US3822103A successfully refreshed from Google Patents.
US3822103A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flexible fan
Assignee: Aisin Corp
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Filing: 1972-12-26
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Granted: 1974-07-02
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Expires: 1992-12-26
Abstract
Abstract The invention relates to a flexible fan comprising, a boss portion and a plurality of fan blades radially extended from the boss portion and integrally formed therewith, the boss portion and the fan blades being of one piece construction and made of synthetic resin material, the flexible fan being characterized in that, alpha shows an angle of inclination of a wing chord against the rotational direction of the blade and beta shows an angle against the wing chord of a leading edge portion of the fan blades, and alpha </= beta is represented.
Inventors
- 👤 T Hori
- 👤 M Hayashi
- 👤 M Yoshida
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:29
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/26; F04D29/32; F04D29/38; F04D29/382; F04D29/384; F04D29/388
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
134 words
A flexible fan comprising: a boss portion; and a plurality of fan blades radially extended from said boss portion and integrally formed therewith; said boss portion and plurality of fan blades being of one piece construction and made of synthetic resinous material; said flexible fan having an angle Alpha between a wing chord and the rotational direction of said fan blades and an angle Beta between said wing chord and a tangent line of a warped line in the leading edge of a leading edge portion in which Alpha is not greater than Beta , said warped line having a bent portion at said leading edge portion, and the bending rate of said bent portion in said leading edge portion against a chord length of said fan blade is between 8 and 30 percent.
Claim 2
Dependent Claim
134 words
A flexible fan comprising: a boss portion; and a plurality of fan blades radially extended from said boss portion and integrally formed therewith; said boss portion and plurality of fan blades being of one piece construction and made of synthetic resinous material; said flexible fan having an angle Alpha between a wing chord and the rotational direction of said fan blades and an angle Beta between said wing chord and a tangent line of a warped line in the leading edge of a leading edge portion in which Alpha is not greater than Beta , said warped line having a bent portion at said leading edge portion, and the bending rate of said bent portion in said leading edge portion against a chord length of said fan blade is between 8 and 30 percent.
Claim 3
Dependent Claim
31 words
The flexible fan as set forth in claim 1, wherein a groove is provided on said fan blade so that the trailing edge portion of said fan blade is easily bent.
Claim 4
Dependent Claim
19 words
The flexible fan as set forth in claim 2, wherein said groove is formed on said trailing edge portion.
Claim 5
Dependent Claim
20 words
The flexible fan as set forth in claim 2, wherein a thin face is formed on said trailing edge portion.
Claim 6
Dependent Claim
134 words
A flexible fan comprisinG: a boss portion; and a plurality of fan blades radially extended from said boss portion and integrally formed therewith; said boss portion and plurality of fan blades being of one piece construction and made of synthetic resinous material; said flexible fan having an angle Alpha between a wing chord and the rotational direction of said fan blades and an angle Beta between said wing chord and a tangent line of a warped line in the leading edge of a leading edge portion in which Alpha is not greater than Beta , said warped line having a bent portion at said leading edge portion, and the bending rate of said bent portion in said leading edge portain against a chord length of said fan blade is between 20 and 24 percent.
Claim 7
Dependent Claim
134 words
A flexible fan comprisinG: a boss portion; and a plurality of fan blades radially extended from said boss portion and integrally formed therewith; said boss portion and plurality of fan blades being of one piece construction and made of synthetic resinous material; said flexible fan having an angle Alpha between a wing chord and the rotational direction of said fan blades and an angle Beta between said wing chord and a tangent line of a warped line in the leading edge of a leading edge portion in which Alpha is not greater than Beta , said warped line having a bent portion at said leading edge portion, and the bending rate of said bent portion in said leading edge portain against a chord length of said fan blade is between 20 and 24 percent.
Claim 8
Dependent Claim
31 words
The flexible fan as set forth in claim 5, wherein a groove is provided on said fan blade so that the trailing edge portion of said fan blade is easily bent.
Claim 9
Dependent Claim
19 words
The flexible fan as set forth in claim 6, wherein said groove is formed on said trailing edge portion.
Claim 10
Dependent Claim
20 words
The flexible fan as set forth in claim 6, wherein a thin face is formed on said trailing edge portion.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-07-01 | 1977-12-31 | 1978-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-01 | 1981-12-31 | 1982-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-01 | 1985-12-31 | 1986-07-02 | $7700.00 | Window Closed / Lapsed |