Respirator

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Description

FIG. 1 is a front elevational view of the respirator embodying our new design;

FIG. 2 illustrates the respirator in rear perspective;

FIG. 3 is a view of one side of the respirator, the opposite side being of substantially the same appearance;

FIG. 4 is a top plan view of the respirator; and

FIG. 5 is a view of the bottom of the respirator.

Referenced Cited
U.S. Patent Documents
D57528 April 1921 Knoblock
2106795 February 1938 Cover
2578007 December 1951 Hill
2845927 August 1958 Hill
3249108 May 1966 Terman
3521630 July 1970 Westberg
4004584 January 25, 1977 Geaney
Patent History
Patent number: D270957
Type: Grant
Filed: Nov 8, 1982
Date of Patent: Oct 11, 1983
Assignee: American Optical Corporation (Southbridge, MA)
Inventors: Richard D. Maryyanek (Northbridge, MA), Joseph Z. Zdrok (Webster, MA)
Primary Examiner: Wallace R. Burke
Assistant Examiner: Horace B. Fay, Jr.
Law Firm: Kenway & Jenney
Application Number: 6/439,948
Classifications
Current U.S. Class: D29/7
International Classification: D2902;