Patent US4587965A successfully refreshed from Google Patents.
US4587965A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ear protector for keeping down sound and associated filter
Assignee: CORNELIS HARDEMAN LOOIERIJSTRAAT 29 4909 BB OOSTEIND NETHERLAND
•
Filing: 1983-12-23
•
Granted: 1986-05-13
•
Expires: 2003-12-23
Abstract
Abstract An ear protector for keeping down sound in a personalized form by causing the insertion part to match the concha part of the auricle with an appendix that can open out in the auditory canal, said ear protector having a relatively wide duct, the widened part of which receives a sound damping filter having a bore whereby the sound damping filter is arranged with satisfactory fit in the widened part of the duct, while an elongate object is placed in the bore of the filter so that a free passage in the bore remains possible with a maximum difference in distance between the outer side of the elongate object and the inner side of the bore of 0.33 mm at the narrowest passage.
Inventors
- 👤 Berend de Boer
- 👤 Karel J. Doorduin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 11:04
CPC Classifications
A; A61; A61F; A61F11/00; A61F11/06; A61F11/08; A61F11/085
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
78 words
An ear protector for insertion in the concha of an ear comprising: a protector body sized to fit securely within the concha and having a duct therethrough for permitting transmission of sound through the body; a filter within a portion of the duct for reducing the sound transmission through the duct wherein the filter has a bore therethrough; an elongated member within at least a portion of the filter bore for further reducing sound transmission through the duct.
Claim 2
Dependent Claim
78 words
An ear protector for insertion in the concha of an ear comprising: a protector body sized to fit securely within the concha and having a duct therethrough for permitting transmission of sound through the body; a filter within a portion of the duct for reducing the sound transmission through the duct wherein the filter has a bore therethrough; an elongated member within at least a portion of the filter bore for further reducing sound transmission through the duct.
Claim 3
Dependent Claim
18 words
The ear protector of claim 1 further comprising a perforated plate within a portion of the filter bore.
Claim 4
Dependent Claim
22 words
The ear protector of claim 1 wherein the protector body is moulded to conform to the shape of a particular person's cochlea.
Claim 5
Dependent Claim
31 words
The ear protector of claim 1 wherein the body duct includes a first portion larger than a second portion and the filter is sized to fit securely in the first portion.
Claim 6
Dependent Claim
49 words
The ear protector of claim 4 wherein the elongated member extends through both portions of the body duct and wherein the duct and the elongated member are sized to leave a passageway for sound transmission through the body, the passageway having a diameter of at most about 0.33 mm.
Claim 7
Dependent Claim
21 words
The ear protector of claim 1 wherein the length of the filter bore is about one-half the depth of the cochlea.
Claim 8
Dependent Claim
14 words
The ear protector of claim 1 wherein the elongated member is a metal wire.
Claim 9
Dependent Claim
16 words
The ear protector of claim 1 wherein the elongated member is formed of a synthetic resin.
Claim 10
Dependent Claim
12 words
The ear protector of claim 2 wherein the perforated plate is ceramic.
Claim 11
Dependent Claim
12 words
The ear protector of claim 2 wherein the perforated plate is glass.
Claim 12
Dependent Claim
16 words
The ear protector of claim 7 wherein the wire has a diameter of about 0.3 mm.
Claim 13
Dependent Claim
26 words
The ear protector of claim 1 further comprising means secured to the filter and extending beyond the protector body for inserting the protector in an ear.
References Cited (Backward Citations)
US2881759A
Cited
US4353364A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-05-12 | 1989-11-11 | 1990-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-05-12 | 1993-11-11 | 1994-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-05-12 | 1997-11-11 | 1998-05-13 | $7700.00 | Window Closed / Lapsed |