USD221655S - Air damper - Google Patents

Description

Des. 221,655 Patented Aug. 31, 1971 United States Patent O we AIR DAMPER Francis J. McCabe, P.0. Box 131,

Penns Park, Pa. 18943 Filed Sept. 29, 1969, Ser. No. 19,336

Term of patent 14 years Int. Cl. D23-03 US. Cl. D23112 FIG. 1 is a perspective view of an air damper embodying my new design invention.

FIG. 2 is a front elevational view'thereof on a reduced scale.

FIG. 3 is a rear elevational view thereof on a reduced scale. Y

FIG. 4 is a left side elevational view thereof on a reduced scale.

FIG. 5 is a bottom plan view thereof on a reduced scale, the damper being broken away for convenience of illustration.

FIG. 6 is a sectional view taken on line 66 of FIG. 2 on a greatly enlarged scale.

FIG. 7 is a view similar to FIG. 6 showing another embodiment of my design invention; and

FIG. 8 is a view similar to FIG. 6 showing a further embodiment of my design invention.

Del. 221,655

PAGE 4 FIG. 9 is a perspective view similar to FIG. 1 with the right end cap removed.

The characteristic features of my design reside in the specific configuration of the louver structure.

I claim:

The ornamental design for an air damper, as shown and described.

References Cited UNITED STATES PATENTS 2,987,985 6/1961 Johnson 98121 3,087,412 4/1963 Holmes 98-121 3,339,330 9/1967 Minds, Ir. 98-121X WALLACE R. BURKE, Primary Examiner S. J. MERCER, Assistant Examiner

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