Earcup soft-seal with thinned lips and interleaving layers of da

Details Earcup soft-seal with thinned lips and interleaving layers of da Earcup soft-seal with thinned lips and interleaving layers of da

1997-11-17

1999-07-13

Calvert, John J.

Apparel

Head coverings

Convertible

2423, 181129, A42B 106

Patent

active

059209119

ABSTRACT:
A high performance hearing protection or communications earcup and seal is disclosed that takes advantage of the facts that a characteristic acoustic impedance mismatch at a boundary will reflect a large portion of impinging energy rather than absorb it, and the "pumping" action on an elastomeric boundary from cyclic acoustic pressure can be damped by placing damping materials adjacent to that boundary. The preferred embodiment of the hearing protection earcup seal of the instant invention interleaves damping materials between the plurality of concentric ring structures of the instant invention and places thinned edges on individual concentric ring structures to enhance seal conformation with obstacles such as eyeglass temple pieces. An elastomeric semi-annular tensile plate supports the concentric ring structures of the instant invention. Both the earcup and earcup seal of the instant invention are readily manufacturable with conventional tooling.

REFERENCES:
patent: 1333012 (1920-05-01), Aileo
patent: 3506980 (1970-04-01), Aileo
patent: 3593341 (1971-07-01), Aileo
patent: 3875592 (1975-04-01), Aileo
patent: 3944018 (1976-03-01), Satory
patent: 4905322 (1990-03-01), Aileo et al.
patent: 5020163 (1991-06-01), Aileo et al.
patent: 5138722 (1992-08-01), Urella et al.
patent: 5400296 (1995-03-01), Cushman et al.
patent: 5500958 (1996-03-01), Falco
patent: 5747549 (1998-05-01), Tsurugai et al.
Physical & Applied Acoustics an Introduction by Erwin Meyer & Ernst-Georg Neumann Section 1.4.

Affiliated with

Also associated with

Rating

Earcup soft-seal with thinned lips and interleaving layers of da does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Earcup soft-seal with thinned lips and interleaving layers of da, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Earcup soft-seal with thinned lips and interleaving layers of da will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2265127