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. 21, 2006
Filed:
Aug. 06, 2001
Grant Stuart Richardson, Salisbury, GB;
William George Mathers, Salisbury, GB;
Grant Stuart Richardson, Salisbury, GB;
William George Mathers, Salisbury, GB;
Abstract
A respirator () comprises an inner, oronasal, mask () enclosed within an outer, face sealing, mask () so as to define a cavity () therewith, a screw-threaded air inlet () for conducting inhaling air to the interior of the inner mask (), a filter canister () for filtering the inhaling air, and an air outlet () for conducting exhaled air from the interior () of the inner mask (). In normal operation, air is inhaled and exhaled solely through the inner mask () and so substantially no air pressure differential exists between the ambient atmosphere () and the cavity () which will allow ambient air to enter the cavity.