The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 18, 1992
Filed:
Jul. 02, 1991
Applicant:
Inventors:
Richard M Urella, Shrewsbury, MA (US);
William B Van Lennep, Pepperell, MA (US);
Assignee:
David Clark Company Inc., Worcester, MA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
A42B / ;
U.S. Cl.
CPC ...
2209 ; 2413 ;
Abstract
An ear seal for use with an earcup of a headset. The ear seal includes at least one ring of noise attenuating material, the material being a mixture of a dilatant silicone compound and a silicone fluid. A sheath is provided to enclose the ring of noise attenuating material. A ring of soft compliant material may also be used adjacent the ring of noise attenuating material for added comfort to the user. A sheath may be provided to enclose both the ring of soft compliant material and the ring of noise attenuating material.