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. 28, 2009
Filed:
Sep. 29, 2003
Grant Stuart Richardson, Salisbury, GB;
Alex Scott Rowbotham, Salisbury, GB;
Graham Howell Williams, Salisbury, GB;
Grant Stuart Richardson, Salisbury, GB;
Alex Scott Rowbotham, Salisbury, GB;
Graham Howell Williams, Salisbury, GB;
Abstract
A valve assembly () for a respirator comprises a valve body () having a valve outlet portion and a valve inlet portion which together define a valve cavity () for a valve mechanism () permitting gas flow from the valve inlet portion to the valve portion member, an air purge means comprising a purge inlet, connectable to an air pressure supply means, an air purge outlet () and an air deflection means () in which the deflection means is spatially arranged relative to the valve mechanism and purge outlet so that, in use, air exiting the purge outlet and incident the air deflection means provides a curtain of air over the valve mechanism.