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:
Sep. 05, 2006
Filed:
Nov. 19, 2003
Applicant:
Otto Gossweiler, Effretikon, CH;
Inventor:
Otto Gossweiler, Effretikon, CH;
Assignee:
TVI Corporation, Glenn Dale, MD (US);
Primary Examiner:
Int. Cl.
CPC ...
B01D 35/00 (2006.01); B01D 46/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A self-sealing protection filter port for gas masks prevents contamination of the inner-environment of the mask during exchange of filters and therefore increases safety. A biased valve closes the air inlet to the port when the protection filter is not installed. As a new filter is inserted, the valve is forced open, allowing filtered air to flow through the air inlet to the user. The protection filter engages the filter port using a retaining element. The self-sealing protection filter in a protection mask having an internal close-biased valve is installed in the standard protection filter port of the mask.