Portable spirometer

- Welch Allyn, Inc.
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Description

FIG. 1 is a perspective view of a portable spirometer, showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a left end elevational view thereof;

FIG. 5 is a right end elevational view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof.

Referenced Cited
U.S. Patent Documents
3922525 November 1975 Kozak et al.
4138105 February 6, 1979 Hunger et al.
4391283 July 5, 1983 Sharpless et al.
4635647 January 13, 1987 Choksi
Other references
  • Vitalograph publication, The Compact Spirometer.
Patent History
Patent number: D325634
Type: Grant
Filed: Mar 30, 1990
Date of Patent: Apr 21, 1992
Assignee: Welch Allyn, Inc. (Skaneateles Falls, NY)
Inventor: Paul B. Sweeney, Jr. (Syracuse, NY)
Primary Examiner: Stella Reid
Law Firm: Wall and Roehrig
Application Number: 7/501,503
Classifications
Current U.S. Class: Pulmonary (38) (D24/164)