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. 20, 1978
Filed:
Dec. 27, 1976
John B Delphia, Milford, MI (US);
Other;
Abstract
A respiratory mask including a mouthpiece in a breathing conduit or passage for conveying breathing gas to and from a breathing chamber. The breathing chamber has collapsible or diaphragm-like walls for expanding and contracting in response to the pressure of the ambient medium surrounding the mask, such as water, as the mask is utilized by a diver. A fresh air gas supply conduit is connected to the respiratory mask for supplying breathing gas to the breathing chamber upon the breathing demand of the wearer of the mask. The breathing gas in the breathing chamber is utilized twice as an exhaust valve connecting the breathing chamber with the ambient medium is maintained closed during two consecutive breathing cycles by an electromagnet which is energized through a replaceable battery in the mask and controlled through an electronic circuit responsive to a bellows which reacts to each breathing cycle of the wearer. In addition, should the electromagnet fail the exhaust valve is biased to the closed position by a spring and operates as a normal exhaust valve during each breathing cycle.