Patent US4044855A successfully refreshed from Google Patents.
US4044855A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Loudspeaker device
Assignee: Sansui Electric Co Ltd
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Filing: 1975-10-30
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Granted: 1977-08-30
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Expires: 1995-10-30
Abstract
Abstract A loudspeaker device, wherein a speaker cabinet fitted with a speaker unit is filled with flexible gas-bearing material and fibrous cotton-like material. According to this invention, it is possible to increase the apparent inner volume of the cabinet, prevent the generation of a standing wave and reproduce sounds with a good quality.
Inventors
- 👤 Fumio Kobayashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:19
CPC Classifications
H; H04; H04R; H04R1/00; H04R1/20; H04R1/22
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
71 words
A loudspeaker device having a speaker unit and a speaker cabinet fitted with the speaker unit, the speaker cabinet comprising at least one first inner region filled with a first filler material formed of a flexible, gas-bearing material comprising a large number of rubber balls and at least one second inner region disposed adjacent to said first inner region and filled with a second filler material made of fibrous cotton-like material.
Claim 2
Dependent Claim
71 words
A loudspeaker device having a speaker unit and a speaker cabinet fitted with the speaker unit, the speaker cabinet comprising at least one first inner region filled with a first filler material formed of a flexible, gas-bearing material comprising a large number of rubber balls and at least one second inner region disposed adjacent to said first inner region and filled with a second filler material made of fibrous cotton-like material.
Claim 3
Dependent Claim
52 words
A loudspeaker device according to claim 1 wherein said speaker cabinet has spaced front and rear faces defining a depth, each face having a length and a width, with said speaker unit mounted in said front face, and with said first and second inner regions arranged in the direction of said length.
Claim 4
Dependent Claim
52 words
A loudspeaker device according to claim 1 wherein said speaker cabinet has spaced front and rear faces defining a depth, each face having a length and a width, with said speaker unit mounted in said front face, and with said first and second inner regions arranged in the direction of said depth.
Claim 5
Dependent Claim
58 words
A loudspeaker device according to claim 1 wherein said speaker cabinet has spaced front and rear faces defining a depth, each face having a length and a width, with said speaker unit mounted in said front face, and with said first and second inner regions alternately arranged in the directions of said length, said width and said depth.
Claim 6
Dependent Claim
15 words
A loudspeaker device according to claim 1, wherein the second filler material is glass wool.
Claim 7
Dependent Claim
15 words
A loudspeaker device according to claim 1, wherein the second filler material is rock wool.
Claim 8
Dependent Claim
15 words
A loudspeaker device according to claim 1, wherein the second filler material is coarse felt.
Claim 9
Dependent Claim
81 words
A loudspeaker device having a speaker cabinet with spaced front and rear faces defining a depth, each face having a length and a width, and a speaker unit mounted in said front face, said speaker cabinet having at least one first inner region filled with a first filler material formed of a flexible, gas-bearing material and at least one second inner region adjacent to said first inner region and filled with a second filler material made of a fibrous cotton-like material.
Claim 10
Dependent Claim
81 words
A loudspeaker device having a speaker cabinet with spaced front and rear faces defining a depth, each face having a length and a width, and a speaker unit mounted in said front face, said speaker cabinet having at least one first inner region filled with a first filler material formed of a flexible, gas-bearing material and at least one second inner region adjacent to said first inner region and filled with a second filler material made of a fibrous cotton-like material.
Claim 11
Dependent Claim
22 words
A loudspeaker device according to claim 8 wherein said first and second inner regions are arranged in the direction of said length.
Claim 12
Dependent Claim
22 words
A loudspeaker device according to claim 8 wherein said first and second inner regions are arranged in the direction of said depth.
Claim 13
Dependent Claim
29 words
A loudspeaker device as defined in claim 8 wherein said first and second inner regions are alternately arranged in the directions of said length, said width and said depth.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-08-29 | 1981-02-28 | 1981-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-08-29 | 1985-02-28 | 1985-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-08-29 | 1989-02-28 | 1989-08-30 | $7700.00 | Window Closed / Lapsed |