IP Library › Granted Patent US 7,322,195
Granted Patent B2
US 7,322,195 · App. 11/109,930 · Granted Jan 29, 2008

Acoustic dampers

View Patent ↗
Loading inventors, assignments & file history…
Monitor This Case
Get email alerts when status or documents change.
Order Certified Copies
Most orders are placed with the USPTO same day — all within 24 business hours.
Order via The Patent Place →
Pre-filled with this patent's details
Quick Facts
Patent No.
US 7,322,195
App. No.
11/109,930
Granted
Jan 29, 2008
Kind
B2
Abstract

An acoustic resonator for use in an engine is provided. The acoustic resonator includes a cavity having a volume, an aperture, and a passage connecting the aperture and the cavity. The aperture has a profiled surface for delaying separation of fluid entering the passage and for reducing losses caused by fluid separation.

Claims (12)

1. A resonator comprising:

a cavity having a volume, an aperture, and a passage connecting the aperture and the cavity;

said aperture having means for delaying separation of fluid entering said passage and for reducing losses caused by fluid separation;

said aperture having a leading edge and said separation delaying means comprising said leading edge being formed by a non-planar surface; and

said aperture having a trailing edge and said trailing edge being formed by a first planar surface intersecting a second planar surface.

2. The resonator according to claim 1 , wherein said non-planar surface is formed by a rounded edge.

3. The resonator according to claim 2 , wherein said rounded edge begins at a point far enough back that flow will not separate from said surface.

4. An engine comprising a resonator incorporated into a portion thereof, said resonator comprising a cavity having a volume, an aperture, and a passage connecting the aperture and the cavity; said aperture having means for delaying separation of fluid entering said passage and for reducing losses caused by fluid separation; said aperture having a leading edge and said separation delaying means comprising said leading edge being formed by a non-planar surface; and said aperture having a trailing edge and said trailing edge being formed by a first planar surface intersecting a second planar surface.

5. The engine according to claim 4 , wherein said non-planar surface is formed by a rounded edge.

6. The engine according to claim 4 , wherein said portion comprises a fan inlet.

7. The engine according to claim 4 , wherein said portion comprises a nacelle inlet.

8. The engine according to claim 4 , wherein said portion comprises a portion of a rocket engine nozzle.

Assignments (10)
TERMINATION AND RELEASE OF SECURITY INTEREST IN PATENTS Recorded Jul 28, 2023
From: BANK OF AMERICA, N.A., AS ADMINISTRATIVE AGENT
To: AEROJET ROCKETDYNE, INC.
Reel/Frame 064424/0109 →
CHANGE OF NAME Recorded Jul 27, 2023
From: RAYTHEON TECHNOLOGIES CORPORATION
To: RTX CORPORATION
Reel/Frame 064714/0001 →
CORRECTIVE ASSIGNMENT TO CORRECT THE AND REMOVE PATENT APPLICATION NUMBER 11886281 AND ADD PATENT APPLICATION NUMBER 14846874. TO CORRECT THE RECEIVING PARTY ADDRESS PREVIOUSLY RECORDED AT REEL: 054062 FRAME: 0001. ASSIGNOR(S) HEREBY CONFIRMS THE CHANGE OF ADDRESS. Recorded Mar 4, 2021
From: UNITED TECHNOLOGIES CORPORATION
To: RAYTHEON TECHNOLOGIES CORPORATION
Reel/Frame 055659/0001 →
CHANGE OF NAME Recorded Sep 4, 2020
From: UNITED TECHNOLOGIES CORPORATION
To: RAYTHEON TECHNOLOGIES CORPORATION
Reel/Frame 054062/0001 →
LICENSE Recorded Aug 5, 2016
From: UNITED TECHNOLOGIES CORPORATION
To: AEROJET ROCKETDYNE, INC. (F/K/A AEROJET-GENERAL CORPORATION, SUCCESSOR OF RPW ACQUISITION LLC)
Reel/Frame 039595/0315 →
RELEASE OF SECURITY INTEREST Recorded Aug 5, 2016
From: U.S. BANK NATIONAL ASSOCIATION
To: AEROJET ROCKETDYNE OF DE, INC. (F/K/A PRATT & WHITNEY ROCKETDYNE, INC.)
Reel/Frame 039597/0890 →
NOTICE OF GRANT OF SECURITY INTEREST IN PATENTS Recorded Jun 17, 2016
From: AEROJET ROCKETDYNE, INC., SUCCESSOR-IN-INTEREST TO RPW ACQUISITION LLC
To: BANK OF AMERICA, N.A., AS ADMINISTRATIVE AGENT
Reel/Frame 039197/0125 →
SECURITY AGREEMENT Recorded Jun 21, 2013
From: PRATT & WHITNEY ROCKETDYNE, INC.
To: U.S. BANK NATIONAL ASSOCIATION
Reel/Frame 030656/0615 →
CONFIRMATORY LICENSE Recorded Jul 5, 2005
From: UNITED TECHNOLOGIES CORPORATION
To: AIR FORCE, UNITED STATES OF AMERICA AS REPRESENTED BY THE SECRETARY OF THE
Reel/Frame 016740/0813 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Apr 19, 2005
From: BORJA, MARK EDWARD; HENDRICKS, GAVIN JULIAN
To: UNITED TECHNOLOGIES CORPORATION
Reel/Frame 016496/0285 →