US5064346A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Impeller of multiblade blower
Assignee: Pacific Industrial Co Ltd
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Filing: 1990-05-15
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Granted: 1991-11-12
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Expires: 2010-05-15
Abstract
Abstract An impeller of a multiblade blower having at least two circular end plates or partition plates spaced apart from each other, and a plurality of blades disposed between the peripheral portions of the partition plates. Each of the blades is formed with a cylindrical portion having a uniform cross-sectional area, at the outer peripheral end thereof on the outer peripheral side of the impeller. The cylindrical portion has a diameter which is larger than the thickness of the blade at the outer peripheral end thereof so that the cylindrical portion is projected from both front and rear surfaces of the blade at the outer peripheral end of the latter.
Inventors
- 👤 Masahiro Atarashi
- 👤 Ito: Shotaro
- 👤 Kiyoshi Sano
- 👤 Yoshiaki Hayashi
- 👤 Kenichi Uno
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:20
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/26; F04D29/32; F04D29/38; F01; F01D; F01D5/00; F01D5/12; F01D5/14; F01D5/141; F04D17/00; F04D17/02; F04D17/04; F04D29/28; F04D29/281; F04D29/282; F04D29/283; F04D29/66; F04D29/661; F04D29/663; F04D29/665; F04D29/666
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
149 words
An impeller of a multiblade blower having an outer peripheral side and at least two circular end plates or partition plates spaced apart from each other, said plates each having an outer peripheral portion, and a plurality of blades disposed between said outer peripheral portions of said partition plates and each of said blades having an outer peripheral end, front and rear surfaces and a thickness, said each blade being formed with a cylindrical portion having a uniform cross-sectional area at said outer peripheral end thereof on the outer peripheral side of said impeller so as to extend through the overall length of said blade, said cylindrical portion having a diameter which is larger than the thickness of said blade at said outer peripheral end thereof, and said cylindrical portion being projected from both front and rear surfaces of said blade at said outer peripheral end of the same.
Claim 2
Dependent Claim
149 words
An impeller of a multiblade blower having an outer peripheral side and at least two circular end plates or partition plates spaced apart from each other, said plates each having an outer peripheral portion, and a plurality of blades disposed between said outer peripheral portions of said partition plates and each of said blades having an outer peripheral end, front and rear surfaces and a thickness, said each blade being formed with a cylindrical portion having a uniform cross-sectional area at said outer peripheral end thereof on the outer peripheral side of said impeller so as to extend through the overall length of said blade, said cylindrical portion having a diameter which is larger than the thickness of said blade at said outer peripheral end thereof, and said cylindrical portion being projected from both front and rear surfaces of said blade at said outer peripheral end of the same.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-11-11 | 1995-05-13 | 1995-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-11-11 | 1999-05-13 | 1999-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-11-11 | 2003-05-13 | 2003-11-12 | $7700.00 | Window Closed / Lapsed |