US3645356A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Loudspeaker
Assignee: Nippon Gakki Co Ltd
•
Filing: 1970-12-23
•
Granted: 1972-02-29
•
Expires: 1990-12-23
Abstract
Abstract A loudspeaker including a diaphragm, means for driving said diaphragm, an annular suspension member of rubberlike elastic material attached to the marginal edge of said diaphragm and a supporting frame to which said suspension member is fixed, characterized in that said suspension member has a relatively large radial width and a tapered thickness which gradually decreases from the outer peripheral portion to the inner peripheral portion, and said member is fixedly connected at said outer peripheral portion to the supporting frame and at said inner peripheral portion to said marginal edge of the diaphragm.
Inventors
- 👤 Hiromi Sotome
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:31
CPC Classifications
H; H04; H04R; H04R7/00; H04R7/16; H04R7/18; H04R7/20; H04R2307/00; H04R2307/207
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
76 words
A loudspeaker comprising a diaphragm, means for driving said diaphragm, an annular suspension member of elastic material, and a supporting frame, said annular suspension member having a relatively large radial width and a tapered thickness which gradually reduces from its outer peripheral portion to its inner peripheral portion and said member being fixedly connected at said inner peripheral portion to the marginal edge of said diaphragm and at said outer peripheral portion to said supporting frame.
Claim 2
Dependent Claim
76 words
A loudspeaker comprising a diaphragm, means for driving said diaphragm, an annular suspension member of elastic material, and a supporting frame, said annular suspension member having a relatively large radial width and a tapered thickness which gradually reduces from its outer peripheral portion to its inner peripheral portion and said member being fixedly connected at said inner peripheral portion to the marginal edge of said diaphragm and at said outer peripheral portion to said supporting frame.
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) | 1975-02-28 | 1975-08-30 | 1976-02-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-28 | 1979-08-30 | 1980-02-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-28 | 1983-08-30 | 1984-02-29 | $7700.00 | Window Closed / Lapsed |