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, 1994
Filed:
Mar. 05, 1993
Richard D Maryyanek, Northbridge, MA (US);
Joseph Z Zdrok, Webster, MA (US);
Keith Simpson, Farnham, GB;
Cabot Safety Corporation, Southbridge, MA (US);
Abstract
A positive pressure test apparatus for fit testing a facepiece respirator having an exhalation valve, including a cover portion having a central bore with an inwardly directed shoulder at the base. A plunger is provided having a stem, a button portion on one end and a flange portion on the opposite end. The stem is situated within the central bore, the button portion extending above the surface of the cover portion in a rest position, and the flange portion extending below the inwardly directed shoulder. Bias means are located in engagement with the button portion and the shoulder for biasing the plunger from the rest position to a depressed position, wherein the button is flush with the surface of the cover portion and the flange portion seals the exhalation valve. A mounting means is provided to attach the positive pressure test apparatus to the respirator.