US4553631A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sound absorption method and apparatus
Assignee: UNITED MCGILL Corp ONE MISSION PARK GROVEPORT OH 43125 A CORP OF OH
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Filing: 1983-05-19
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Granted: 1985-11-19
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Expires: 2003-05-19
Abstract
Abstract A method of absorbing sound generated within a clean-room environment and the sound-absorbing panel for carrying out that method, wherein said sound absorbing panel comprises a fibrous core material enclosed in a non-porous membrane, said membrane being attached to at least one of the extensive surfaces of said fiberglass core in a series of closed geometric figures. The membrane occupying the central portion of each of said geometric figures defines a diaphragm, the dimensions of the diaphragm being configured such that the lower order natural frequencies of vibration of each of the independent diaphragms correspond substantially to the frequency range of sound to be absorbed.
Inventors
- 👤 Michael J. Panza
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:15
CPC Classifications
B; B32; B32B; B32B5/00; B32B5/02; G; G10; G10K; G10K11/00; G10K11/16; B32B3/00; B32B3/02; B32B3/04; B32B3/10; B32B3/12; B32B7/00; B32B7/04; B32B7/12; B32B2262/00; B32B2262/10; B32B2262/101; B32B2307/00; B32B2307/10; B32B2307/70; B32B2307/726; B32B2307/7265
Claims Analysis
Total Claims: 34
Claim 1
Independent Claim
127 words
Sound-absorbing panel for use in clean-room environment comprising: a fibrous core having a first extensive surface, a second extensive surface parallel to and spaced apart from said first extensive surface and a thickness being the perpendicular distance between said extensive surfaces; a non-porous membrane being disposed to enclose said fibrous core, said membrane being attached to at least one of said extensive surfaces in a continuous pattern of closed geometric figures, the places of attachment defining the edges of said geometric figures, the membrane occupying the central portion of each of said geometric figures defining a diaphragm, the dimensions of said diaphragm being configured such that the low order natural frequencies of vibration of said diaphragm substantially corresponds to the sound wave frequency range to be absorbed.
Claim 2
Dependent Claim
127 words
Sound-absorbing panel for use in clean-room environment comprising: a fibrous core having a first extensive surface, a second extensive surface parallel to and spaced apart from said first extensive surface and a thickness being the perpendicular distance between said extensive surfaces; a non-porous membrane being disposed to enclose said fibrous core, said membrane being attached to at least one of said extensive surfaces in a continuous pattern of closed geometric figures, the places of attachment defining the edges of said geometric figures, the membrane occupying the central portion of each of said geometric figures defining a diaphragm, the dimensions of said diaphragm being configured such that the low order natural frequencies of vibration of said diaphragm substantially corresponds to the sound wave frequency range to be absorbed.
Claim 3
Dependent Claim
11 words
The apparatus according to claim 1 wherein said membrane is waterproof.
Claim 4
Dependent Claim
14 words
The apparatus according to claim 1 wherein said membrane is a substantially smooth material.
Claim 5
Dependent Claim
43 words
The apparatus according to claim 1 wherein said fibrous core has a thickness in which the low order standing wave natural frequencies, and the low order natural frequencies in combination with said diaphragm is substantially similar to the diaphragm low order natural frequencies.
Claim 6
Dependent Claim
16 words
Apparatus according to claim 4 wherein said fibrous core has a thickness of approximately 1 inch.
Claim 7
Dependent Claim
16 words
The apparatus according to claim 1 wherein said fibrous core is hermetically sealed by said membrane.
Claim 8
Dependent Claim
12 words
The apparatus according to claim 1 wherein said fibrous core is fiberglass.
Claim 9
Dependent Claim
18 words
The apparatus according to claim 1 wherein said membrane is attached to said fibrous core by an adhesive.
Claim 10
Dependent Claim
84 words
The apparatus according to claim 1 wherein said membrane is attached to said second extensive surface of said fibrous core in a continuous pattern of closed geometric figures, the places of attachment defining the edges of said geometric figures, the membrane occupying the central portion of each of said geometric figures defining a diaphragm, the dimensions of said diaphragm being configured such that the low order natural frequencies of vibration of said diaphragm substantially corresponds to the sound wave frequency range to be absorbed.
Claim 11
Dependent Claim
14 words
The apparatus according to claim 1 wherein said diaphragms have the shape of hexagons.
Claim 12
Dependent Claim
14 words
The apparatus according to claim 1 wherein said diaphragms have the shape of circles.
Claim 13
Dependent Claim
23 words
The apparatus according to claim 1 wherein the dimensions of said geometric figures correspond to an equivalent circle having a 1/2 inch diameter.
Claim 14
Dependent Claim
22 words
The apparatus according to claim 10 wherein the distance between the opposite sides of one of said hexagons is approximately 1/2 inch.
Claim 15
Dependent Claim
29 words
The apparatus according to claim 1 wherein the center frequency of said frequency range to be absorbed is in the range of about 1000 Hz. to about 2000 z.
Claim 16
Dependent Claim
50 words
The apparatus according to claim 1 wherein said places of attachment of said membrane to said first extensive surface of said fibrous core further comprise an intermediate material bearing an adhesive on the faces of said intermediate material adjacent to and in contact with said membrane and said fibrous core.
Claim 17
Dependent Claim
50 words
The apparatus according to claim 9 wherein said places of attachment of said membrane to said second extensive surface of said fibrous core further comprise an intermediate material bearing an adhesive on the faces of said intermediate material adjacent to and in contact with said membrane and said fibrous core.
Claim 18
Independent Claim
159 words
A method for absorbing sound generated within a clean-room environment comprising the steps of: disposing on at least one interior surface of the room a sound-absorbing panel having: a fibrous core with a first extensive surface, a second extensive surface parallel to and spaced apart from said first extensive surface and a thickness being the perpendicular distance between said extensive surfaces; a non-porous membrane enclosing said fibrous core, said membrane being attached to at least said first extensive surface in a continuous pattern of closed geometric figures, the places of attachment defining the edges of said geometric figure, the membrane occupying the central portion of each of said geometric figures defining a diaphragm, the dimensions of said diaphragm being configured such that the low order natural frequencies of vibration of said diaphragm substantially corresponds to the sound wave frequency range to be absorbed; said sound-absorbing panel having said first extensive surface disposed to face the interior of the room.
Claim 19
Independent Claim
159 words
A method for absorbing sound generated within a clean-room environment comprising the steps of: disposing on at least one interior surface of the room a sound-absorbing panel having: a fibrous core with a first extensive surface, a second extensive surface parallel to and spaced apart from said first extensive surface and a thickness being the perpendicular distance between said extensive surfaces; a non-porous membrane enclosing said fibrous core, said membrane being attached to at least said first extensive surface in a continuous pattern of closed geometric figures, the places of attachment defining the edges of said geometric figure, the membrane occupying the central portion of each of said geometric figures defining a diaphragm, the dimensions of said diaphragm being configured such that the low order natural frequencies of vibration of said diaphragm substantially corresponds to the sound wave frequency range to be absorbed; said sound-absorbing panel having said first extensive surface disposed to face the interior of the room.
Claim 20
Dependent Claim
11 words
The method according to claim 17 wherein said membrane is waterproof.
Claim 21
Dependent Claim
14 words
The method according to claim 17 wherein said membrane is a substantially smooth material.
Claim 22
Dependent Claim
43 words
The method according to claim 17 wherein said fibrous core has a thickness in which the lower order standing wave natural frequencies, and the lower order natural frequencies in combination with said diaphragm is substantially similar to the diaphragm lower order natural frequencies.
Claim 23
Dependent Claim
17 words
The method according to claim 20 wherein said fibreous core has a thickness of approximately 1 inch.
Claim 24
Dependent Claim
15 words
The method according to claim 17 wherein said fibrous core is sealed by said membrane.
Claim 25
Dependent Claim
12 words
The method according to claim 17 wherein said fibrous core is fiberglass.
Claim 26
Dependent Claim
18 words
The method according to claim 17 wherein said membrane is attached to said fibrous core by an adhesive.
Claim 27
Dependent Claim
84 words
The method according to claim 17 wherein said membrane is attached to said second extensive surface of said fibrous core in a continuous pattern of closed geometric figures, the places of attachment defining the edges of said geometric figures, the membrane occupying the central portion of each of said geometric figures defining a diaphragm, the dimensions of said diaphragm being configured such that the lower order natural frequencies of vibration of said diaphragm substantially corresponds to the sound wave frequency range to be absorbed.
Claim 28
Dependent Claim
14 words
The method according to claim 17 wherein said diaphragms have the shape of hexagons.
Claim 29
Dependent Claim
14 words
The method according to claim 17 wherein said diaphragms have the shape of circles.
Claim 30
Dependent Claim
23 words
The method according to claim 17 wherein the dimensions of said geometric figures corresponds to an equivalent circle having a 1/2 inch diameter.
Claim 31
Dependent Claim
22 words
The method according to claim 26 wherein the distance between the opposite sides of one of said hexagons is approximately 1/2 inch.
Claim 32
Dependent Claim
29 words
The method according to claim 17 wherein the center frequency of said frequency range to be absorbed is in the range of about 1000 Hz. to about 2000 Hz.
Claim 33
Dependent Claim
50 words
The method according to claim 17 wherein said places of attachment of said membrane to said first extensive surface of said fibrous core further comprise an intermediate material bearing an adhesive on the faces of said intermediate material adjacent to and in contact with said membrane and said fibrous core.
Claim 34
Dependent Claim
50 words
The method according to claim 17 wherein said places of attachment of said membrane to said second extensive surface of said fibrous core further comprise an intermediate material bearing an adhesive on the faces of said intermediate material adjacent to and in contact with said membrane and said fibrous core.
References Cited (Backward Citations)
US2413568A
Cited
US3183996A
Cited
US3151700A
Cited
US3948347A
Cited
US4111081A
Cited
US4194329A
Cited
US4253543A
Cited
US4347912A
Cited
US4301890A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-11-18 | 1989-05-20 | 1989-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-11-18 | 1993-05-20 | 1993-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-11-18 | 1997-05-20 | 1997-11-19 | $7700.00 | Window Closed / Lapsed |