Dual filter respirator

Description

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

FIG. 2 is a rear perspective view thereof;

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

FIG. 4 is a top plan view thereof; and

FIG. 5 is a bottom plan view thereof.

Referenced Cited
U.S. Patent Documents
D271246 November 1, 1983 Matheson et al.
2664887 January 1954 Green
4373520 February 15, 1983 Arbiqne
Foreign Patent Documents
460003 May 1928 DE2
Other references
  • New Equipment Digest (vol. 48, No. 2, Feb. 1983) Scientific Library Call No. TA/401/.N45 (p. 88: Lightweight Respirator).
Patent History
Patent number: D286213
Type: Grant
Filed: May 11, 1983
Date of Patent: Oct 14, 1986
Inventors: Richard D. Maryyanek (Northbridge, MA), Joseph Z. Zdrok (Webster, MA)
Primary Examiner: Wallace R. Burke
Assistant Examiner: Brian N. Vinson
Law Firm: Pahl, Lorusso & Loud
Application Number: 6/493,649
Classifications
Current U.S. Class: D29/7