Air filter unit for use in respirators


FIG. 1 is a top front perspective view of a preferred embodiment of the air filter unit for use in respirators;

FIG. 2 is a top plan view thereof;

FIG. 3 is a left side elevational view thereof, the right side being a mirror image of that shown; and,

FIG. 4 is a bottom plan view.

The pattern of holes has been partially shown in FIGS. 1 and 3 for ease of illustration, it being understood that the broken lines indicate that said pattern of holes is continuous throughout the areas represented.

Referenced Cited
U.S. Patent Documents
1585113 May 1926 Robert
3580250 May 1971 Oroza
4334533 June 15, 1982 Henkin
4649912 March 17, 1987 Collins
5222488 June 29, 1993 Forsgren
Foreign Patent Documents
379381 September 1932 GBX
Patent History
Patent number: D360029
Type: Grant
Filed: Apr 20, 1994
Date of Patent: Jul 4, 1995
Assignee: Grand Bleu International, Inc. (New York, NY)
Inventor: Yukio Yoshikawa (Saitama)
Primary Examiner: Lisa P. Lichtenstein
Law Firm: Darby & Darby
Application Number: 0/21,578