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. 21, 1994
Filed:
Dec. 29, 1992
Hans-Joachim Walther, Lubeck, DE;
Dragerwerk AG, Lubeck, DE;
Abstract
A breathing mask with a fan for feeding respiration air into the interior space of the mask has a flow indicator for indicating a necessary respiration air flow at the air outlet end of the fan connection. In order for this indicator to be directly recognizable by the mask user in his field of vision, the opening of the air outlet end (4) shall be closed at least partially by a flow plate, which is movably mounted on a guide structure (11, 20) such that it emerges into the field of vision of the mask user in the presence of air flow, and guides the respiration air flow along the inner side of the window (10). If the respiration air flow is insufficient, the flap jumps back, and warning windows appear, instead, in the range of vision of the mask user.