Patent US4840178A successfully refreshed from Google Patents.
US4840178A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnet for installation in the middle ear
Assignee: RICHARDS METAL Co
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Filing: 1987-05-15
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Granted: 1989-06-20
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Expires: 2007-05-15
Abstract
Abstract A magnet assembly for location around portions of bones in the middle ear where one portion of the assembly is a magnet and another portion of the assembly is a magnetic material, the portions being hinged to one another so that they are held around the bone by the magnetic field and being adapted for optimal coupling with a magnetic field produced by a coil in a magnetic induction hearing aid.
Inventors
- 👤 Jorgen Heide
- 👤 Timothy D. Gooch
- 👤 Anthony D. Prescott
- 👤 Dennis Bojrab
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:31
CPC Classifications
H; H04; H04R; H04R25/00; H04R25/60; H04R25/604; H04R25/606
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
86 words
A magnet assembly for coupling with the magnetic coil of a hearing said, comprising: a first separate section sized and shaped to partially surround at least a portion of a bone in the ossicular chain; a second separate section sized and shaped to cooperate with the first section and clamp onto said portion of a bone in the ossicular chain, at least one of the first and second sections comprising a magnet and the other section formed of material that is magnetically attracted to the magnet.
Claim 2
Dependent Claim
86 words
A magnet assembly for coupling with the magnetic coil of a hearing said, comprising: a first separate section sized and shaped to partially surround at least a portion of a bone in the ossicular chain; a second separate section sized and shaped to cooperate with the first section and clamp onto said portion of a bone in the ossicular chain, at least one of the first and second sections comprising a magnet and the other section formed of material that is magnetically attracted to the magnet.
Claim 3
Dependent Claim
124 words
The magnet assembly of claim 1, further comprising: hinge means for connecting said first and second sections, said hinge means contacting said first and second sections so that a portion of each section is on both sides of the pivot point of said hinge means; the sections being shaped and dimensioned so that force applied to outer surfaces of each section in the direction of the other section on one side of said pivot point will cause the portion of each section on the other side of said pivot point to move apart, removal of the force allowing said section portions to move together and clamp onto a portion of a bone in the ossicular chain because of the magnetic attraction of said sections.
Claim 4
Dependent Claim
22 words
The magnet assembly of claim 2, wherein one section is formed of a magnet and the other section of magnetically attracted material.
Claim 5
Dependent Claim
20 words
The magnet assembly of claim 2, wherein both sections are magnets with poles located so that they attract each other.
Claim 6
Dependent Claim
15 words
The magnet assembly of claim 2, wherein both sections are coated with a biocompatible polymer.
Claim 7
Dependent Claim
28 words
The magnet assembly of claim 2, wherein said hinge means includes one section having a fulcrum and the other section having a fulcrum groove for receiving the fulcrum.
Claim 8
Dependent Claim
22 words
The magnet assembly of claim 2, wherein first and second pieces include opposing faces and hollowed-out portions designed to engage the incus.
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) | 1992-06-19 | 1992-12-19 | 1993-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-06-19 | 1996-12-19 | 1997-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-06-19 | 2000-12-19 | 2001-06-20 | $7700.00 | Window Closed / Lapsed |