Patent EP0095540A2 successfully refreshed from Google Patents.
EP0095540A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
A ceramic rotor
Assignee: NGK Insulators Ltd
•
Filing: 1982-12-06
•
Granted: —
•
Expires: 2002-12-06
Abstract
Abstract The disclosed ceramic rotor has at least a rotary body portion thereof made of ceramic. The ceramic portion of the ceramic rotor has a dynamic unbalance of less than 0.5 g.cm. This reduces the susceptibility of the rotor to fracture at high rotational speed at high temperature.
Inventors
- 👤 Isao Oda
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-04 05:00
CPC Classifications
F; F04; F04F; F04F13/00; F01; F01D; F01D5/00; F01D5/02; F01D5/027; F01D5/12; F01D5/28; F01D5/284; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49316; Y10T29/49336; Y10T29/49764; Y10T29/49771; Y10T29/49774
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
51 words
A ceramic rotor, comprising a rotary body portion (3,7), and a rotary body-holding portion (4,6) supporting said rotary body portion (3,7), at least said rotary body portion (3) being made of ceramic, characterised in that the ceramic portion of the ceramic rotor has a dynamic unbalance of less than 0.5 g'cm.
Claim 2
Dependent Claim
51 words
A ceramic rotor, comprising a rotary body portion (3,7), and a rotary body-holding portion (4,6) supporting said rotary body portion (3,7), at least said rotary body portion (3) being made of ceramic, characterised in that the ceramic portion of the ceramic rotor has a dynamic unbalance of less than 0.5 g'cm.
Claim 3
Dependent Claim
22 words
A ceramic rotor as claimed in claim 1, wherein said ceramic is selected from silicon nitride (Si3N4)' silicon carbide (SiC), and sialon.
Claim 4
Dependent Claim
57 words
A ceramic rotor as claimed in claim 1 or claim 2, wherein said ceramic rotor is a pressure wave supercharger rotor, said rotary body portion has a plurality of through holes extending substantially parallel to the longitudinal axis of said ceramic rotor, and said rotary body-holding portion has a shaft hole adapted to engage a rotary shaft.
Claim 5
Dependent Claim
33 words
A ceramic rotor as claimed in claim 1 or claim 2, wherein said ceramic rotor is a radial type turbocharger rotor, and said rotary body-holding portion has a rotary shaft integrally coupled thereto.
Claim 6
Dependent Claim
42 words
A ceramic rotor as claimed in claim 1 or claim 2 wherein said ceramic rotor is an axial flow type gas turbine engine rotor, and said rotary body-holding portion is wheel-shaped and has a shaft hole adapted to engage a rotary shaft.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.