Patent US4597469A successfully refreshed from Google Patents.
US4597469A
Expired / Lapsed
US
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Collapsible headphone structure
Assignee: Pioneer Corp
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Filing: 1985-03-21
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Granted: 1986-07-01
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Expires: 2005-03-21
Abstract
Abstract A headphone structure comprises a pair of headband arms, a pair of phone units having joint arms, a first joint member for pivotally connecting the pair of headband arms, and a pair of second joint members for pivotally connecting the pair of phone units through their joint arms to the pair of headband arms, respectively. The headband arms and the phone units are collapsible via the first joint member and the second joint members. Rotational paths of the second joint members are included in a single plane. On the other hand, a rotational path of the first joint member is perpendicular to the single plane.
Inventors
- 👤 Mitsukatsu Nagashima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:43
CPC Classifications
H; H04; H04R; H04R5/00; H04R5/033; H04R5/0335; H04R1/00; H04R1/10; H04R1/1008
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
113 words
A collapsible headphone structure comprising: a pair of headband arms, each being comprised of an upper and a lower arm section; a pair of earphone units each respectively affixed to one end of said lower arm section; a first joint member for pivotally connecting said pair of headband arms; a pair of second joint members for pivotally connecting said upper sections of said headband arms to said lower sections of said headband arms; whereby said handband arms are foldable by means of said first and second joint members, wherein the rotational plane of said arms in said first joint is perpendicular to the rotational plane of said sections in said second joint members.
Claim 2
Dependent Claim
113 words
A collapsible headphone structure comprising: a pair of headband arms, each being comprised of an upper and a lower arm section; a pair of earphone units each respectively affixed to one end of said lower arm section; a first joint member for pivotally connecting said pair of headband arms; a pair of second joint members for pivotally connecting said upper sections of said headband arms to said lower sections of said headband arms; whereby said handband arms are foldable by means of said first and second joint members, wherein the rotational plane of said arms in said first joint is perpendicular to the rotational plane of said sections in said second joint members.
Claim 3
Dependent Claim
20 words
The structure of claim 1, wherein said first joint member and said second joint members each have a U-shaped cross-section.
Claim 4
Dependent Claim
20 words
The headphone of claim 2, wherein said first member and said second joint members have substantially the same in structure.
Claim 5
Dependent Claim
22 words
The headphone of claim 1, wherein said first joint member and said second joint members each have a pair of pivot pins.
References Cited (Backward Citations)
US1395864A
Cited
US1699127A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-06-30 | 1989-12-30 | 1990-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-06-30 | 1993-12-30 | 1994-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-06-30 | 1997-12-30 | 1998-07-01 | $7700.00 | Window Closed / Lapsed |