US3864756A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adjustable earmuffs
Assignee: United States Department of the Navy
•
Filing: 1972-12-18
•
Granted: 1975-02-11
•
Expires: 1992-12-18
Abstract
Abstract An ear protecting headgear having means for adjusting the pressure of an earmuff seal against the head of a wearer useful in high noise environments. In a headgear such as a helmet the apparatus includes a pair of cords connected at their respective one ends to a pair of resilient supports containing earmuffs, and at their other ends to a single take-up device mounted on the helmet. Manual manipulation of the take-up device selectively and simultaneously shortens the extensible length of both cords moving both earmuffs inwardly toward a wearer''s ears, adjusting the earmuff seal pressure against the wearer''s head and effectuating varying degrees of ambient sound attenuation.
Inventors
- 👤 David N Desimone
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 06:34
CPC Classifications
A; A42; A42B; A42B3/00; A42B3/04; A42B3/16; A42B3/166
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
123 words
Headgear comprising, in combination; a helmet; a pair of ear covers formed to encompass the ears; a pair of resilient support means mounted on said helmet each containing one of said ear covers for juxtapositioning said ear covers adjacent to respective ones of the ears; and adjustment means for simultaneously pulling said ear covers toward the ears including take-up means operatively mounted on said helmet, guide means fixed to the inside of said helmet between said take-up means and said support means, and a pair of cords threaded through said guide means fixed at their respective one ends to said take-up means and extending laterally outward from said helmet, fixedly terminating at their respective other ends at respective ones of said support means.
Claim 2
Dependent Claim
123 words
Headgear comprising, in combination; a helmet; a pair of ear covers formed to encompass the ears; a pair of resilient support means mounted on said helmet each containing one of said ear covers for juxtapositioning said ear covers adjacent to respective ones of the ears; and adjustment means for simultaneously pulling said ear covers toward the ears including take-up means operatively mounted on said helmet, guide means fixed to the inside of said helmet between said take-up means and said support means, and a pair of cords threaded through said guide means fixed at their respective one ends to said take-up means and extending laterally outward from said helmet, fixedly terminating at their respective other ends at respective ones of said support means.
Claim 3
Dependent Claim
41 words
Headgear as set forth in claim 1, further comprising: said take-up means being disposed on the inside of said helmet and having a member disposed on the outside of said helmet communicating therewith for winding said cord on said take-up means.
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) | 1978-02-10 | 1978-08-12 | 1979-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-10 | 1982-08-12 | 1983-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-10 | 1986-08-12 | 1987-02-11 | $7700.00 | Window Closed / Lapsed |