US4083655A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Turbine rotor
Assignee: GROUPE EUROPEEN POUR LA TECHNIQUE DES TURBINES A VAPEUR G E T T SA
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Filing: 1976-12-16
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Granted: 1978-04-11
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Expires: 1996-12-16
Abstract
Abstract A turbine rotor having twisted blades, are, in the vicinity of their radiy outer portions integrally connected with each other to prevent any rotation in either direction of one blade in relation to its neighboring blades. The blades are prestressed during assembly by being un-twisted through an angle which is less than or equal to and in the same direction as the angle through which said blades would be un-twisted during rotation if they were free to rotate in relation to each other.
Inventors
- 👤 Robert Tempere
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 06:35
CPC Classifications
F; F01; F01D; F01D5/00; F01D5/12; F01D5/22; Y; Y10; Y10S; Y10S416/00; Y10S416/50
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
101 words
A mobile stage of a turbo-machine comprising: a plurality of radially extending twisted blades, connection means fitted to each blade in the vicinity of their radially outer portions for making them integral with each other and for preventing rotation in either direction of one blade in relation to its neighbouring blades, and said blades being prestressed during assembly by being un-twisted through an angle a which is less than or equal to and in the same direction as the angle b through which said blades would be un-twisted during rotation if they were free to rotate in relation to each other.
Claim 2
Dependent Claim
101 words
A mobile stage of a turbo-machine comprising: a plurality of radially extending twisted blades, connection means fitted to each blade in the vicinity of their radially outer portions for making them integral with each other and for preventing rotation in either direction of one blade in relation to its neighbouring blades, and said blades being prestressed during assembly by being un-twisted through an angle a which is less than or equal to and in the same direction as the angle b through which said blades would be un-twisted during rotation if they were free to rotate in relation to each other.
References Cited (Backward Citations)
US2198784A
Cited
FR69842E
Cited
FR1252763A
Cited
FR1374917A
Cited
DE1426798A1
Cited
US3396905A
Cited
US3719432A
Cited
US3795462A
Cited
US3771922A
Cited
US3990813A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-04-10 | 1981-10-10 | 1982-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-04-10 | 1985-10-10 | 1986-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-04-10 | 1989-10-10 | 1990-04-11 | $7700.00 | Window Closed / Lapsed |