or
Bookmark and Share
Double hearing protection device
 
   
Document Number
US Patent 7457428
Issued Date
November 25, 2008
Link
Inventors
Du; Yu (Christiansburg, VA)
Map
Abstract
A double hearing protection system comprises a circumaural hearing protector that covers and encircles the pinnae and an earplug device that is inserted into the ear canal. The earplug portion of the system comprises a tether that is coupled to the interior of a circumaural hearing protector. The tether retracts into the earcup when both the earplug and circumaural hearing protector are worn, ensuring that the earseal against the head is not broken by the retractable tether.
Tags:
Description:
Amusing 0%
Clever 0%
Complex 0%
Efficient 0%
Historic 0%
Important 0%
Innovative 0%
Interesting 0%
Practical 0%
Simple 0%
Number of Claims:
15
Comments:
no comments yet
Owner
Published
November 25, 2008
Application Number
11/494,067
Filed
July 27, 2006
US Classification
381/372   381/380
Int'l Classification
H04R   25/00   (20060101)  
Examiner
Attorney/Law Firm
USPTO Field of Search
381/72   381/370   381/372   381/380   181/129   181/130   181/135   128/864   128/866   128/867   2/209  
Related Patents
Claims
Description
About| FAQs| Terms & Disclaimer| Link to Us| Contact Us