US4168762A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Loudspeaker enclosure
Assignee: AMANITA SOUND Inc
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Filing: 1978-01-13
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Granted: 1979-09-25
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Expires: 1998-01-13
Abstract
Abstract A loudspeaker enclosure comprises a shell having an opening therein and a loudspeaker mounting baffle disposed over the opening. The shell is formed entirely from one or more diaphragm members or passive radiators which oscillate in response to selected low frequency sound waves emanating from a loudspeaker mounted within the enclosure. The diaphragms forming the shell reinforce the forward acoustic radiation from the loudspeaker and militate against the formation of standing waves within the enclosure.
Inventors
- 👤 Timothy L. Griffin, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:05
CPC Classifications
H; H04; H04R; H04R1/00; H04R1/20; H04R1/22; H04R1/28; H04R1/2807; H04R1/283; H04R1/2834; H04R1/2869; H04R1/2876; H04R1/288
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
162 words
A loudspeaker enclosure comprising a shell having an opening therein and a loudspeaker mounting baffle disposed over said opening, said shell being entirely formed from one or more diaphragm members of a stiffness sufficient to maintain the structural integrity of said shell while being oscillatory in response to sound waves of a selected frequency range emanating from a loudspeaker mounted in said baffle, oscillations of said diaphragm members serving to alter the compliance of air in the interior of said enclosure, radiate acoustic energy in said selected frequency range in a phase relationship to reinforce the forward acoustic radiation from said loudspeaker and substantially militate against the sympathetic acoustic interaction between the said enclosure and acoustic apparatus sensitive to outside sound, said diaphragms including inwardly depressed generally planar diffuser ribs which effect the stiffening of said shell and the reflective scattering of sound waves of selected frequency impinging on said diaphragms for militating against the formation of standing waves within the enclosure.
Claim 2
Dependent Claim
162 words
A loudspeaker enclosure comprising a shell having an opening therein and a loudspeaker mounting baffle disposed over said opening, said shell being entirely formed from one or more diaphragm members of a stiffness sufficient to maintain the structural integrity of said shell while being oscillatory in response to sound waves of a selected frequency range emanating from a loudspeaker mounted in said baffle, oscillations of said diaphragm members serving to alter the compliance of air in the interior of said enclosure, radiate acoustic energy in said selected frequency range in a phase relationship to reinforce the forward acoustic radiation from said loudspeaker and substantially militate against the sympathetic acoustic interaction between the said enclosure and acoustic apparatus sensitive to outside sound, said diaphragms including inwardly depressed generally planar diffuser ribs which effect the stiffening of said shell and the reflective scattering of sound waves of selected frequency impinging on said diaphragms for militating against the formation of standing waves within the enclosure.
Claim 3
Dependent Claim
17 words
The loudspeaker enclosure of claim 1 wherein said shell comprises an integral arrangement of said diaphragm members.
Claim 4
Dependent Claim
32 words
The loudspeaker enclosure of claim 1 wherein said loudspeaker mounting baffle is formed from a rigid material which is generally non-oscillatory in response to sound waves emanating from a loudspeaker carried thereby.
Claim 5
Dependent Claim
16 words
The loudspeaker enclosure of claim 1 wherein said shell is formed from a low density polyethylene.
Claim 6
Dependent Claim
20 words
The loudspeaker enclosure of claim 4 wherein said diaphragm members are of a thickness of approximately 0.120 to 0.180 in.
Claim 7
Dependent Claim
21 words
The loudspeaker enclosure of claim 4 wherein said low density polyethylene is shaped into said shell by a rotational molding process.
Claim 8
Dependent Claim
21 words
The loudspeaker enclosure of claim 1 wherein the interior of said shell is lined with a high frequency sound absorbing medium.
Claim 9
Dependent Claim
17 words
The loudspeaker enclosure of claim 7 wherein said high frequency sound absorbing medium comprises a convoluted foam.
References Cited (Backward Citations)
US3240289A
Cited
US3194340A
Cited
US3285364A
Cited
US3746125A
Cited
US3882962A
Cited
US4010821A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-09-24 | 1983-03-26 | 1983-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-09-24 | 1987-03-26 | 1987-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-09-24 | 1991-03-26 | 1991-09-25 | $7700.00 | Window Closed / Lapsed |