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:
Mar. 24, 2015
Filed:
Mar. 14, 2012
Applicant:
Paul Townsend, Northumberland, GB;
Inventor:
Paul Townsend, Northumberland, GB;
Assignee:
Draeger Safety UK Limited, Northumberland, GB;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
A61M 11/00 (2006.01); A62B 9/02 (2006.01); F16K 7/12 (2006.01);
U.S. Cl.
CPC ...
A62B 9/027 (2013.01); F16K 7/12 (2013.01);
Abstract
A diaphragm for a lung demand valve, including a chemical, biological, radiological and/or nuclear (CBRN) layer which is sufficiently resistant to the permeation of at least some CBRN agents and a resilient layer which is resiliently deformable. The CRBN layer is arranged to restrict the permeation of at least some CBRN agents through the diaphragm, and the resilient layer is arranged to allow the diaphragm to be resiliently deformed.