Air velocity gauge

- Dwyer Instruments, Inc.
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Description

FIG. 1 is a front elevational view of an air velocity gauge showing our new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a right front perspective view thereof;

FIG. 5 is a left rear perspective view thereof; and

FIG. 6 is a right side elevational view thereof.

Referenced Cited
U.S. Patent Documents
2075424 March 1937 Bull
2889707 June 1959 Snider
3796097 March 1974 Ruskin
3955415 May 11, 1976 Sharon
4154101 May 15, 1979 Buchanan et al.
Foreign Patent Documents
2257114 January 1974 DEX
277914 September 1927 GBX
Patent History
Patent number: D255666
Type: Grant
Filed: May 5, 1978
Date of Patent: Jul 1, 1980
Assignee: Dwyer Instruments, Inc.
Inventors: Steven O. Buchanan (Michigan City, IN), Robert W. Butts (Lakeville, IN)
Primary Examiner: Nelson C. Holtje
Attorney: Thomas F. McWilliams
Application Number: 5/903,226
Classifications
Current U.S. Class: Volume, Flow Or Rate (D10/96)
International Classification: D1004;