US3671140A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Damped turbomachine rotor assembly
Assignee: Avco Corp
•
Filing: 1970-10-05
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Granted: 1972-06-20
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Expires: 1990-10-05
Abstract
Abstract THE DISCLOSURE ILLUSTRATES A CENTRIFUGAL COMPRESSOR COMPRISING AN INDUCE HUB TELESCOPED OVER AN ADJACENT SHOULDER OF AN IMPELLER HUB. THE INDUCER HUB HAS AN INNER ANNULAR SURFACE WHICH RECEIVES AN ANNULAR RELATIVELY THIN SPLIT RING ELEMENT. WHEN THE COMPRESSOR ROTATES AT HIGH R.P.M''S THE SPLIT RING FRICTIONALLY ENGAGES THE INNER ANNULAR SURFACE OF THE INDUCER HUB TO DAMP VIBRATIONS.
Inventors
- 👤 Wayne C Shank
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:19
CPC Classifications
F; F01; F01D; F01D5/00; F01D5/02; F01D5/04; F01D5/043; F01D5/045; Y; Y10; Y10S; Y10S416/00; Y10S416/50
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-06-20 | 1975-12-20 | 1976-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-20 | 1979-12-20 | 1980-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-20 | 1983-12-20 | 1984-06-20 | $7700.00 | Window Closed / Lapsed |