US3194487A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Noise abatement method and apparatus
Assignee: RTX Corp
•
Filing: 1963-06-04
•
Granted: 1965-07-13
•
Expires: 1983-06-04
Abstract
No abstract record available.
Inventors
- 👤 John M Tyler
- 👤 Thomas G Sofrin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:55
CPC Classifications
F; F02; F02C; F02C7/00; F02C7/04; F02C7/045; F04; F04D; F04D19/00; F04D19/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
142 words
IN AN AXIAL COMPRESSOR LOCATED WITHIN A FLUID FLOW CONFINING AND WHICH DEVELOPS NOISE CREATING SPINNING MODES DUE TO INTERACTION BETWEEN STATOR VANES AND ROTOR BLADES, THE METHOD OF REDUCING THE STRENGTH OF THE NOISE CREATING SPINNING MODES COMPRISING POSITIONING A FIXED STATOR WITHIN THE DUCT WHICH STATOR HAS A PRESELECTED NUMBER OF STATIONARY VANES AROUND THE PERIPHERY THEREOF, SUPPORTING A ROTOR FOR ROTATION WITHIN THE DUCT WHICH ROTOR HAS A PRESCRIBED NUMBER OF BLADES AROUND THE PERIPHERY THEREOF AND WITH THE BLADES OF THE ROTOR BEING OF DIFFERENT NUMBER FROM THE VANVES OF THE STATOR THEREBY DEVELOPING NOISE CREATING SPINNING MODES DUE TO INTERACTION BETWEEN THE STATIONARY VANES AND THE ROTATING BLADES, AND POSITIONING THE ROTOR TO ABOUT FIVE CHORD LENGSHT FROM THE STATOR TO REDUCE THE STRENGTH OF THE INTERACTION BETWEEN SPINNING MODES SO DEVELOPED AS TO REDUCE THE NOISE.
Claim 2
Dependent Claim
142 words
IN AN AXIAL COMPRESSOR LOCATED WITHIN A FLUID FLOW CONFINING AND WHICH DEVELOPS NOISE CREATING SPINNING MODES DUE TO INTERACTION BETWEEN STATOR VANES AND ROTOR BLADES, THE METHOD OF REDUCING THE STRENGTH OF THE NOISE CREATING SPINNING MODES COMPRISING POSITIONING A FIXED STATOR WITHIN THE DUCT WHICH STATOR HAS A PRESELECTED NUMBER OF STATIONARY VANES AROUND THE PERIPHERY THEREOF, SUPPORTING A ROTOR FOR ROTATION WITHIN THE DUCT WHICH ROTOR HAS A PRESCRIBED NUMBER OF BLADES AROUND THE PERIPHERY THEREOF AND WITH THE BLADES OF THE ROTOR BEING OF DIFFERENT NUMBER FROM THE VANVES OF THE STATOR THEREBY DEVELOPING NOISE CREATING SPINNING MODES DUE TO INTERACTION BETWEEN THE STATIONARY VANES AND THE ROTATING BLADES, AND POSITIONING THE ROTOR TO ABOUT FIVE CHORD LENGSHT FROM THE STATOR TO REDUCE THE STRENGTH OF THE INTERACTION BETWEEN SPINNING MODES SO DEVELOPED AS TO REDUCE THE NOISE.
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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) | 1968-07-12 | 1969-01-11 | 1969-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-07-12 | 1973-01-11 | 1973-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-07-12 | 1977-01-11 | 1977-07-13 | $7700.00 | Window Closed / Lapsed |