Patent US4554993A successfully refreshed from Google Patents.
US4554993A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Inflight headset for civil aircraft
Assignee: Individual
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Filing: 1984-07-11
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Granted: 1985-11-26
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Expires: 2004-07-11
Abstract
Abstract The present invention relates to an inflight headset for civil aircraft and in particular to one comprising a pair of main body portions each having a cylindrical member formed integrally therewith, a pair of covers each connected to one of the main body portions, a headband each end of which is provided with a collar having a protuberance at its lower end, a pair of ear cushions each connected to one of the main body portions, and a pair of acoustic pipes each connected to one of the main body portions.
Inventors
- 👤 Huang-Kiang Houng
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:29
CPC Classifications
H; H04; H04M; H04M1/00; H04M1/02; H04M1/04; H04M1/05
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
156 words
An inflight headset for civil aircraft comprising: a pair of main body portions each having a cylindrical member formed integrally therewith, said cylindrical member having one end connected to said body portion and the other end being provided with a semi-circular protuberance; a pair of covers each connected to one of said main body portions; a headband each end of which is provided with a collar having a protuberance at one end thereof, said cylindrical member of said main body portion being fitted in said collar in such a way that the protuberance of said collar in association with the semi-circular protuberance of said cylindrical member enables said main body portion to rotate through 90° with respect to a plane perpendicular to the length of said headband; a pair of ear cushions each connected with one of said main body portions; and a pair of acoustic pipes each connected to one of said main body portions.
Claim 2
Dependent Claim
156 words
An inflight headset for civil aircraft comprising: a pair of main body portions each having a cylindrical member formed integrally therewith, said cylindrical member having one end connected to said body portion and the other end being provided with a semi-circular protuberance; a pair of covers each connected to one of said main body portions; a headband each end of which is provided with a collar having a protuberance at one end thereof, said cylindrical member of said main body portion being fitted in said collar in such a way that the protuberance of said collar in association with the semi-circular protuberance of said cylindrical member enables said main body portion to rotate through 90° with respect to a plane perpendicular to the length of said headband; a pair of ear cushions each connected with one of said main body portions; and a pair of acoustic pipes each connected to one of said main body portions.
Claim 3
Dependent Claim
20 words
An inflight headset for civil aircraft as claimed in claim 1, wherein said collars are made of an elastic material.
Claim 4
Dependent Claim
39 words
An inflight headset for civil aircraft as claimed in claim 1, wherein each said cover has a smoothly curved inner surface so that a very smooth passage is formed when said cover is engaged with said main body portion.
References Cited (Backward Citations)
US1587409A
Cited
US4472607A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-11-25 | 1989-05-27 | 1989-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-11-25 | 1993-05-27 | 1993-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-11-25 | 1997-05-27 | 1997-11-26 | $7700.00 | Window Closed / Lapsed |