US5267720A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Structureborne noise isolator
Assignee: Litton Marine Systems Inc
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Filing: 1991-12-06
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Granted: 1993-12-07
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Expires: 2011-12-06
Abstract
Abstract A structureborne noise isolator employs a two axis system whereby a noise generating platform is coupled to an inner frame by a first pair of diametrically positioned noise isolators, the inner frame being coupled to an outer frame by a second pair of diametrically positioned noise isolators. At least one noise isolator comprising a coil spring shrink fitted at one end to an inner housing and at the other end to a cover. The inner housing is inserted into an outer housing with a damping compound between and potted to the inner and outer housings. Additional damping compound is bonded to the base of the outer housing separating the base of the outer housing from the base of the inner housing. The cover, having damping compound bonded thereto, is coupled to the outer housing. A hub, positioned adjacent to the damping compound on the cover, is coupled to the inner housing.
Inventors
- 👤 James R. Brazell
- 👤 Jamil I. Lahham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 12:12
CPC Classifications
F; F16; F16F; F16F15/00; F16F15/02; F16F15/04; F16F15/06; G; G01; G01C; G01C19/00; G01C19/58; G01C19/64; G01C19/66; G01C19/661
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
179 words
An apparatus for providing structureborne noise isolation between a platform assembly having a center of gravity; an outer frame; an inner frame; first pair of isolators positioned between said platform and said inner frame along a first common axis in a manner to couple said platform to said inner frame; and a second pair of isolators positioned between said inner frame and said outer frame along a second common axis to couple said inner frame to said outer frame; wherein at least one of said isolators comprises: an inner housing having a base; a spring having one end thereof bonded to said base of said inner housing; an outer housing having a base, said inner housing inserted in said outer housing with said base of said inner housing adjacent said base of said outer housing; a cover having one surface bonded to an end of said spring opposite said one end and coupled to said outer housing; and a hub having a base adjacent a surface of said cover opposite said one surface and coupled to said inner housing.
Claim 2
Independent Claim
179 words
An apparatus for providing structureborne noise isolation between a platform assembly having a center of gravity; an outer frame; an inner frame; first pair of isolators positioned between said platform and said inner frame along a first common axis in a manner to couple said platform to said inner frame; and a second pair of isolators positioned between said inner frame and said outer frame along a second common axis to couple said inner frame to said outer frame; wherein at least one of said isolators comprises: an inner housing having a base; a spring having one end thereof bonded to said base of said inner housing; an outer housing having a base, said inner housing inserted in said outer housing with said base of said inner housing adjacent said base of said outer housing; a cover having one surface bonded to an end of said spring opposite said one end and coupled to said outer housing; and a hub having a base adjacent a surface of said cover opposite said one surface and coupled to said inner housing.
Claim 3
Dependent Claim
31 words
An apparatus in accordance with claim 1 wherein said first and second pairs of isolators are positioned such that said first and second common axes pass through said center of gravity.
Claim 4
Dependent Claim
23 words
An apparatus in accordance with claim 1 wherein said coil spring is bonded to said inner housing and said cover by shrink fitting.
Claim 5
Dependent Claim
41 words
An apparatus in accordance with claim 1 further including: a first snubber positioned between said base of said hub and said cover; and a second snubber positioned between said base of said inner housing and said base of said outer housing.
Claim 6
Dependent Claim
23 words
An apparatus in accordance with claim 4 further including a high loss damping compound inserted between said inner housing and said outer housing.
Claim 7
Dependent Claim
23 words
An apparatus in accordance with claim 5 wherein said coil spring is bonded to said inner housing and said cover by shrink fitting.
Claim 8
Dependent Claim
98 words
A noise isolator comprising: an inner housing having a base; a coil spring having one end thereof bonded to said base of said inner housing; an outer housing having a base, said inner housing inserted in said outer housing with said base of said inner housing adjacent said base of said outer housing; a cover having one surface bonded to an end of said coil spring opposite said one end and coupled to said outer housing; and a hub having a base adjacent a surface of said cover opposite said one surface and coupled to said inner housing.
Claim 9
Dependent Claim
98 words
A noise isolator comprising: an inner housing having a base; a coil spring having one end thereof bonded to said base of said inner housing; an outer housing having a base, said inner housing inserted in said outer housing with said base of said inner housing adjacent said base of said outer housing; a cover having one surface bonded to an end of said coil spring opposite said one end and coupled to said outer housing; and a hub having a base adjacent a surface of said cover opposite said one surface and coupled to said inner housing.
Claim 10
Dependent Claim
23 words
An apparatus in accordance with claim 7 herein said coil spring is bonded to said inner housing and said cover by shrink fitting.
Claim 11
Dependent Claim
40 words
An apparatus in accordance with claim 7 further including: first snubber positioned between said base of said hub and said cover; and a second number positioned between said base of said inner housing and said base of said outer housing.
Claim 12
Dependent Claim
23 words
An apparatus in accordance with claim 9 further including a high loss damping compound inserted between said inner housing and said outer housing.
Claim 13
Dependent Claim
23 words
An apparatus in accordance with claim 10 wherein said coil spring is bonded to said inner housing and said cover by shrink fitting.
References Cited (Backward Citations)
US1832368A
Cited
US2076699A
Cited
US2465790A
Cited
US2912212A
Cited
US4681293A
Cited
US4731985A
Cited
US4863139A
Cited
US5178357A
Cited
US5040764A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-12-06 | 1997-06-07 | 1997-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-12-06 | 2001-06-07 | 2001-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-12-06 | 2005-06-07 | 2005-12-07 | $7700.00 | Window Closed / Lapsed |