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. 05, 2022
Filed:
Sep. 25, 2020
Bio-med Devices, Inc., Guilford, CT (US);
Raymond J. Huey, Orange, CT (US);
Jack N. Sandgren, Guilford, CT (US);
Shamili Krishnamurthy, Branford, CT (US);
Ronald C. Baktis, Wallingford, CT (US);
Bio-Med Devices, Inc., Guilford, CT (US);
Abstract
An air/oxygen blender, optionally with an associated oxygen analyzer, is provided with an exhaust valve in fluid communication with one or more of a proportioning valve and a gas outlet which periodically opens to vent gas therefrom. The exhaust valve is preferably an electrically actuated valve, most preferably a solenoid valve, controlled by a control unit which periodically opens the exhaust valve. In another embodiment, an oxygen analyzer is provided with an exhaust valve in fluid communication with an oxygen sensing chamber. Preferably, the control unit controls the frequency of exhaust valve opening and the time period of exhaust valve opening. A method of prevention of contamination of a lower pressure source air or source oxygen connected to an air/oxygen blender is accomplished by periodically venting of gas from the exhaust valve.