US4027117A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Headphone
Assignee: Individual
•
Filing: 1975-11-04
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Granted: 1977-05-31
•
Expires: 1995-11-04
Abstract
Abstract A headphone supported at the ear position for reproducing sound comprises (a) an oscillating member for sound reproduction, (b) a frame to support the oscillating member, (c) at least one opening constituting a path from the space, defined by the inside of the oscillating member, an ear pad and the ear to the free space on the outside of the oscillating member, and (d) an acoustic resistance member disposed in the opening.
Inventors
- 👤 Komatsu Nakamura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 02:51
CPC Classifications
H; H04; H04R; H04R1/00; H04R1/10; H04R1/1008
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
92 words
A headphone for reproducing sound at the ear of a listener which comprises: an oscillating member for sound reproduction; an ear pad adapted to rest against the ear of the listener; a frame supporting the oscillating member and the ear pad, the frame being provided with an opening constituting a path from the space defined by one side of the oscillating member, the ear pad and the ear of the listener to the free space on the other side of the oscillating member; and an acoustic resistance member disposed across the opening.
Claim 2
Dependent Claim
92 words
A headphone for reproducing sound at the ear of a listener which comprises: an oscillating member for sound reproduction; an ear pad adapted to rest against the ear of the listener; a frame supporting the oscillating member and the ear pad, the frame being provided with an opening constituting a path from the space defined by one side of the oscillating member, the ear pad and the ear of the listener to the free space on the other side of the oscillating member; and an acoustic resistance member disposed across the opening.
Claim 3
Dependent Claim
23 words
A headphone according to claim 1, wherein: the acoustic resistance member is ring-shaped and is disposed between the frame and the ear pad.
Claim 4
Dependent Claim
25 words
A headphone according to claim 1, wherein the ear pad includes: a porous resilient member; and a leather-like member partly covering the porous resilient member.
Claim 5
Dependent Claim
97 words
A headphone for reproducing sound at the ear of a listener which comprises: an oscillating member for sound reproduction; an ear pad adapted to extend between one side of the oscillating member and the ear of the listener; a frame supporting the oscillating member, the frame being provided with a plurality of openings constituting paths from the space defined by the one side of the oscillating member, the ear pad and the ear of the listener to the free space on the other side of the oscillating member; and an acoustic resistance member disposed across the openings.
Claim 6
Dependent Claim
97 words
A headphone for reproducing sound at the ear of a listener which comprises: an oscillating member for sound reproduction; an ear pad adapted to extend between one side of the oscillating member and the ear of the listener; a frame supporting the oscillating member, the frame being provided with a plurality of openings constituting paths from the space defined by the one side of the oscillating member, the ear pad and the ear of the listener to the free space on the other side of the oscillating member; and an acoustic resistance member disposed across the openings.
Claim 7
Dependent Claim
21 words
A headphone according to claim 4, wherein: the acoustic resistance is ring-shaped and covers all of the openings of the 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) | 1980-05-30 | 1980-11-29 | 1981-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-05-30 | 1984-11-29 | 1985-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-05-30 | 1988-11-29 | 1989-05-31 | $7700.00 | Window Closed / Lapsed |