Patent US4368238A successfully refreshed from Google Patents.
Patent US4146111A successfully refreshed from Google Patents.
US4146111A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Speaker system
Assignee: Trio KK
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Filing: 1977-01-12
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Granted: 1979-03-27
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Expires: 1997-01-12
Abstract
Abstract A speaker system comprising a speaker cabinet having a forward baffle plate, two side plates and a rear plate, a passive diaphragm, a speaker mounted in the baffle plate of the speaker cabinet, an opening disposed in the baffle plate next to the speaker as an outlet for the sound radiated from the passive diaphragm, a dividing plate slantedly disposed between the baffle plate and the rear plate of the speaker cabinet, the dividing plate dividing the speaker cabinet into a first part including the speaker and a second part including the opening, the passive diaphragm being mounted in the dividing plate.
Inventors
- 👤 Yutaka Mae
- 👤 Shiro Iwakura
- 👤 Sigeyuki Koga
- 👤 Hideki Ogawa
- 👤 Hideaki Kanda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:41
CPC Classifications
H; H04; H04R; H04R1/00; H04R1/20; H04R1/22; H04R1/28; H04R1/2807; H04R1/283; H04R1/2834; H04R1/2869; H04R1/2884; H04R1/2888
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
116 words
A speaker system comprising a speaker cabinet having a forward baffle plate, two side plates, a rear plate, a top plate and a bottom portion; a passive diaphragm; a speaker mounted in said baffle plate of said speaker cabinet; an opening disposed in said baffle plate next to said speaker as an outlet for the sound radiated from said passive diaphragm; a dividing plate slantedly disposed between said baffle plate and said rear plate of said speaker cabinet, said dividing plate dividing said speaker cabinet into a first part including said speaker and said top plate and a second part including said opening and said bottom portion, said passive diaphragm being mounted in the dividing plate.
Claim 2
Dependent Claim
116 words
A speaker system comprising a speaker cabinet having a forward baffle plate, two side plates, a rear plate, a top plate and a bottom portion; a passive diaphragm; a speaker mounted in said baffle plate of said speaker cabinet; an opening disposed in said baffle plate next to said speaker as an outlet for the sound radiated from said passive diaphragm; a dividing plate slantedly disposed between said baffle plate and said rear plate of said speaker cabinet, said dividing plate dividing said speaker cabinet into a first part including said speaker and said top plate and a second part including said opening and said bottom portion, said passive diaphragm being mounted in the dividing plate.
Claim 3
Dependent Claim
34 words
A speaker system as in claim 1 where said dividing plate is so slanted in said speaker cabinet that the position thereof at said baffle plate is higher than that at said rear plate.
Claim 4
Dependent Claim
34 words
A speaker system as in claim 1 where said dividing plate is so slanted in said speaker cabinet that the position thereof at said baffle plate is lower than that at said rear plate.
Claim 5
Dependent Claim
36 words
A speaker system as in claim 1 including openings in said side plates as further outlets for the sound radiated from said passive diaphragm, said openings being disposed in said second part of the speaker cabinet.
Claim 6
Dependent Claim
39 words
A speaker system as in claim 4 including an opening in said rear plate as a further outlet for the sound radiated from said passive diaphragm, said latter opening being disposed in said second part of the speaker cabinet.
Claim 7
Dependent Claim
14 words
A speaker system as in claim 1 where said bottom portion is a plate.
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) | 1982-03-26 | 1982-09-25 | 1983-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-03-26 | 1986-09-25 | 1987-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-03-26 | 1990-09-25 | 1991-03-27 | $7700.00 | Window Closed / Lapsed |