Oxygen concentration

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Description

FIG. 1 is a perspective view of an oxygen concentrator, showing our new design;

FIG. 2 is a left side perspective view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a right side elevational view thereof;

FIG. 5 is a top plan view thereof; and

FIG. 6 is a rear elevational view thereof.

Referenced Cited
U.S. Patent Documents
D261676 November 3, 1981 McCombs
3804942 April 1974 Kato et al.
3976050 August 24, 1976 Glasser et al.
4502873 March 5, 1985 Mottram et al.
4545790 October 8, 1985 Miller et al.
Patent History
Patent number: D320458
Type: Grant
Filed: Mar 9, 1989
Date of Patent: Oct 1, 1991
Assignee: Ryder International Corporation (Arab, AL)
Inventors: Francis E. Ryder (Arab, AL), Joseph J. Cerola (Guntersville, AL)
Primary Examiner: Stella Reid
Law Firm: Trexler, Bushnell, Giangiorgi & Blackstone, Ltd.
Application Number: 7/321,531
Classifications
Current U.S. Class: Pulmonary (38) (D24/164)