US4385866A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Curved blade rotor for a turbo supercharger
Assignee: Toshiba Corp
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Filing: 1980-03-17
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Granted: 1983-05-31
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Expires: 2000-03-17
Abstract
Abstract A curved blade rotor for a radial inflow turbo supercharger which is made of ceramic material and having a plurality of curved blades each with a curved outer edge. The surface roughness of the curved outer edge is 0.8S to 2S wherein "S" indicates surface roughness according to Japanese Industrial Standard B 0601.
Inventors
- 👤 Toshihiko Ochiai
- 👤 Kiyoshi Nakamura
- 👤 Katsutoshi Nishida
- 👤 Masato Sakai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 08:21
CPC Classifications
F; F01; F01D; F01D5/00; F01D5/02; F01D5/04; F01D5/043; F01D5/048; F01D5/12; F01D5/28; F01D5/284; F01D5/30; F01D5/3084; F05; F05D; F05D2250/00; F05D2250/70; F05D2250/71
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
91 words
A curved blade rotor for a radial inflow turbo supercharger having a casing including a curved portion, said rotor comprising: a ceramic material having a plurality of curved blades extending therefrom, each of which have a curved outer edge bordering with, and closely corresponding to, said curved portion of said casing, only said curved outer edge being machine finished to a surface roughness of 0.8S to 2S wherein "S" indicates surface roughness according to Japanese Industrial Standard B 0601, the remainder of the surface of said rotor not being machine finished.
Claim 2
Dependent Claim
91 words
A curved blade rotor for a radial inflow turbo supercharger having a casing including a curved portion, said rotor comprising: a ceramic material having a plurality of curved blades extending therefrom, each of which have a curved outer edge bordering with, and closely corresponding to, said curved portion of said casing, only said curved outer edge being machine finished to a surface roughness of 0.8S to 2S wherein "S" indicates surface roughness according to Japanese Industrial Standard B 0601, the remainder of the surface of said rotor not being machine finished.
Claim 3
Dependent Claim
16 words
A curved blade rotor according to claim 1, said ceramic material being formed by furnace sintering.
Claim 4
Dependent Claim
17 words
A curved blade rotor according to claims 1 or 2, wherein said ceramic material comprises silicon nitride.
Claim 5
Dependent Claim
17 words
A curved blade rotor according to claims 1 or 2, wherein said ceramic material comprises aluminum nitride.
Claim 6
Dependent Claim
17 words
A curved blade rotor according to claims 1 or 2, wherein said ceramic material comprises silicon carbide.
Claim 7
Dependent Claim
17 words
A curved blade rotor according to claims 1 or 2, wherein said ceramic material comprises silicon oxynitride.
Claim 8
Dependent Claim
18 words
A curved blade rotor according to claims 1 or 2, wherein said ceramic material comprises silicon aluminum oxynitride.
Claim 9
Dependent Claim
19 words
A curved blade rotor according to claims 1 or 2, wherein said ceramic material comprises silicon nitride silicon carbide.
Claim 10
Dependent Claim
16 words
A curved blade rotor according to claim 1, wherein the surface roughness is formed by grinding.
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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) | 1986-05-30 | 1986-11-29 | 1987-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-05-30 | 1990-11-29 | 1991-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-05-30 | 1994-11-29 | 1995-05-31 | $7700.00 | Window Closed / Lapsed |