Exhaust air valve

- Flakt Aktiebolag
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Description

FIG. 1 is a perspective view of an exhaust air valve in an open position, showing my new design;

FIG. 2 is a perspective view thereof, in a closed position;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a side elevational view thereof; and

FIG. 5 is a top plan view thereof.

Referenced Cited
U.S. Patent Documents
2620673 December 1952 Whitcomb
3315585 April 1967 Hawkins et al.
3951130 April 20, 1976 Lowe
4059045 November 22, 1977 McClain
4103495 August 1, 1978 Graham
Patent History
Patent number: D278079
Type: Grant
Filed: Jul 23, 1982
Date of Patent: Mar 19, 1985
Assignee: Flakt Aktiebolag (Nacka)
Inventor: Lennart Widerby (Jonkoping)
Primary Examiner: A. Hugo Word
Assistant Examiner: Lynn Wilder
Law Firm: Dann, Dorfman, Herrell and Skillman
Application Number: 6/401,131
Classifications
Current U.S. Class: D23/19; D23/139