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:
Sep. 14, 1993
Filed:
Sep. 04, 1991
Neil J Sheehan, Palo Alto, CA (US);
William M Moore, Foster City, CA (US);
William New, Jr, Woodside, CA (US);
Natus Medical, Inc., Foster City, CA (US);
Abstract
A cup member defines a cavity for covering an infant's ear, and an annular member extends from an end portion of the cup member. The cup member and the annular member each comprise a first sound attenuating layer of foam material which attenuates high frequency sound and a second sound attenuating layer of a material which attenuates low frequency sound. The annular member has a surface for placing the earmuff against the infant's head. A hydrogel adhesive is disposed on the surface for bonding the earmuff to the infant's head. The hydrogel layer preferably extends along the plane defined by the surface of the annular member and into the cavity defined by the cup member for bonding the earmuff to a substantially hairless portion of the infant's head located behind the pinna. A portion of the annular member may be creased for forming a bendable tab which helps to conform the earmuff to the curvature of the infant's head behind the ear, and a slit may be formed in the cup member to prevent air pressure build-up in the event of compression of the cup member.