Cap for air compressor

FIG. 1 is a front perspective view of a cap for air compressor showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a bottom plan view thereof;

FIG. 6 is a left side elevational view thereof;

FIG. 7 is a right side elevational view thereof;

FIG. 8 is a rear elevational view thereof;

FIG. 9 is a rear elevational view thereof, the mouth and the protrusion and the bulges depicted by means of broken lines being for illustrative purposes only and forming no part of the claimed design; and,

FIG. 10 is a front perspective view thereof, the recess depicted by means of broken lines being for illustrative purposes only and forming no part of the claimed design.