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:
Apr. 20, 1993
Filed:
Oct. 16, 1990
Applicant:
Inventor:
Ross Gardner, Jr, Indianapolis, IN (US);
Assignee:
Cabot Safety Corporation, Southbridge, MA (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
A61F / ;
U.S. Cl.
CPC ...
128864 ; 604369 ;
Abstract
Disclosed herein are hearing protective earplug constructions of the roll-down type. In one aspect the constructions employ means to limit the depth of insertion of the earplug into the ear canal and to facilitate proper insertion thereof. In another aspect, the constructions employ polymeric foam bodies adapted to be compressed, inserted into the ear canal and there allowed to expand to obturate the ear canal and whose recovery time is markedly and inversely temperature dependent.