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:
Oct. 17, 1989
Filed:
Feb. 04, 1988
Mark Magidson, Los Angeles, CA (US);
Otto L Huber, Beverly Hills, CA (US);
Moldex/Metric Products, Inc., Culver City, CA (US);
Abstract
A filter respirator forming a face mask to be worn upon the face of a user including a support layer of flexible material. The support layer is molded to conform to the contours of the face of the user and forms a flexible support layer for filter material. A separate layer of filter material filters out impurities. An exhalation valve extends through the support layer and the filter layer in a central position. The exhalation valve includes an inside surface surrounding the central position. A molded non-porous flexible inner flange forms a flexible half-mask for sealing to the face of the user. The inner flange is attached to the peripheral edges of at least the support layer and extends inward to the central position. The inner flange includes a central opening with a surrounding portion conforming and adjacent to the inside surface of the exhalation valve. This forms an inhalation valve between the inside surface of the exhalation passage and the surrounding portion of the central opening of the inner flange.