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:
Jun. 03, 2008
Filed:
Sep. 03, 2004
Applicant:
Jeffrey A. Alvey, Union Bridge, MD (US);
Inventor:
Jeffrey A. Alvey, Union Bridge, MD (US);
Assignee:
TVI Corporation, Glenn Dale, MD (US);
Primary Examiner:
Int. Cl.
CPC ...
A62B 7/10 (2006.01);
U.S. Cl.
CPC ...
Abstract
An improvement to a combination of an SCBA system for providing bottled air to a user and a PAPR system for purifying ambient air for use by a user wherein a sensor is included to determine the oxygen content of the breathing gas and the presence of contaminations in the atmosphere to control operation of the two systems depending on the contaminated condition of the ambient air and the oxygen content of the ambient air.