US5040764A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low frequency vibration absorber
Assignee: United States Department of the Navy
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Filing: 1990-09-28
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Granted: 1991-08-20
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Expires: 2010-09-28
Abstract
Abstract A mounting assembly for absorbing low frequency vibrational energy as proed by a source and isolating a base member therefrom, the mounting assembly including a central metallic ring, non-metallic foam rings located on both sides of the central metallic ring in concentric relation with respect thereto, and inner and outer metallic ring members engaging said foam rings in concentric relation, the foam rings defining a spongy mass that effectively absorbs the low frequency vibrational energy emanating from the source.
Inventors
- 👤 Neil J. Dubois
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:35
CPC Classifications
F; F16; F16F; F16F7/00; F16F7/10; F16F7/104; F16F7/108; F16F3/00; F16F3/08; F16F3/087; F16F3/0873
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
233 words
A mounting assembly for absorbing low frequency vibrational energy as produced by a source that is mounted to a base member, comprising: a central metallic ring member having inner and outer cylindrical surfaces of preselected diameter; a first non-metallic foam ring having inner and outer cylindrical surfaces, said inner cylindrical surface thereof being fixedly attached to said outer surface of said central metallic ring member in concentric relation with respect thereto; a second non-metallic foam ring having inner and outer cylindrical surfaces, said outer cylindrical surface thereof being fixedly attached to said inner surface of said central metallic ring member in concentric relation with respect thereto; an inner metallic ring member having inner and outer cylindrical surfaces, said outer cylindrical surface thereof being fixedly attached to said inner cylindrical surface of said second foam ring in concentric relation with respect thereto; an outer metallic ring member having inner and outer cylindrical surfaces, said inner cylindrical surface thereof being fixedly attached to said outer cylindrical surface of said first foam ring in concentric relation with respect thereto; inner mounting means interconnecting said inner metallic ring member to said source of low frequency vibrational energy; and outer mounting means interconnecting said outer metallic ring member to said base member; wherein said cylindrical foam rings absorb the vibrational energy as produced by said source of low frequency vibrational energy for substantially isolating said base member therefrom.
Claim 2
Dependent Claim
233 words
A mounting assembly for absorbing low frequency vibrational energy as produced by a source that is mounted to a base member, comprising: a central metallic ring member having inner and outer cylindrical surfaces of preselected diameter; a first non-metallic foam ring having inner and outer cylindrical surfaces, said inner cylindrical surface thereof being fixedly attached to said outer surface of said central metallic ring member in concentric relation with respect thereto; a second non-metallic foam ring having inner and outer cylindrical surfaces, said outer cylindrical surface thereof being fixedly attached to said inner surface of said central metallic ring member in concentric relation with respect thereto; an inner metallic ring member having inner and outer cylindrical surfaces, said outer cylindrical surface thereof being fixedly attached to said inner cylindrical surface of said second foam ring in concentric relation with respect thereto; an outer metallic ring member having inner and outer cylindrical surfaces, said inner cylindrical surface thereof being fixedly attached to said outer cylindrical surface of said first foam ring in concentric relation with respect thereto; inner mounting means interconnecting said inner metallic ring member to said source of low frequency vibrational energy; and outer mounting means interconnecting said outer metallic ring member to said base member; wherein said cylindrical foam rings absorb the vibrational energy as produced by said source of low frequency vibrational energy for substantially isolating said base member therefrom.
Claim 3
Dependent Claim
22 words
A mounting assembly as claimed in claim 1, said first and second non-metallic foam rings being formed of a material comprising polyurethane.
Claim 4
Dependent Claim
20 words
A mounting assembly as claimed in claim 2, said central metallic ring being formed of a metallic material comprising steel.
Claim 5
Dependent Claim
23 words
A mounting assembly as claimed in claim 3, said inner and outer metallic ring members being formed of a metallic material comprising aluminum.
Claim 6
Dependent Claim
21 words
A mounting assembly as claimed in claim 4 wherein said source of low frequency vibrational energy is an electrically energized motor.
Claim 7
Dependent Claim
53 words
A mounting assembly as claimed in claim 4, said aluminum inner and outer ring members having inner and outer radially extending flanges formed thereon respectively, the inner flange of said inner ring member being interconnected to said source, and the outer flange of said outer ring member being interconnected to said base member.
Claim 8
Dependent Claim
43 words
A mounting assembly as claimed in claim 6, at least one other of said mounting assemblies being interconnected to said source and to said base member for attenuating low frequency vibrational energy as produced by said source for isolating said base member therefrom.
Claim 9
Dependent Claim
33 words
A mounting assembly as claimed in claim 1, said base member being defined by a cylindrical shell member within which said assembly and said source of said low frequency vibrational energy are mounted.
References Cited (Backward Citations)
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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) | 1994-08-19 | 1995-02-18 | 1995-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-08-19 | 1999-02-18 | 1999-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-08-19 | 2003-02-18 | 2003-08-20 | $7700.00 | Window Closed / Lapsed |