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. 03, 2007
Filed:
Nov. 12, 2004
Desmond T. Curran, Durham, GB;
Peter D. Lee, Cleveland, GB;
Richard D. Williams, Lancaster, GB;
Peter N. Yates, Lancaster, GB;
Derek S. Baker, Lake Elmo, MN (US);
Desmond T. Curran, Durham, GB;
Peter D. Lee, Cleveland, GB;
Richard D. Williams, Lancaster, GB;
Peter N. Yates, Lancaster, GB;
Derek S. Baker, Lake Elmo, MN (US);
3M Innovative Properties Company, St. Paul, MN (US);
Abstract
A supplied air helmetcomprises a visorand a face sealthat is secured to the visor. The face sealincludes a sealing memberand a frame memberThe sealing memberextends radially inward from the frame memberand has first and second regions of permeabilityandThe second regionhas greater permeability than the first regionThe use of a face sealthat has differentiated permeability allows for a controlled flow of air through the interior of the supplied air helmet