Overlapping fan-blade structure for a fan wheel

FIG. 1 is a perspective view of the overlapping fan-blade structure for fan wheel in accordance with a first embodiment of the claimed design;

FIG. 2 is a right side elevational view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a front elevational view thereof;

FIG. 5 is a bottom plan view thereof;

FIG. 6 is a left side elevational view thereof;

FIG. 7 is a rear elevational view thereof;

FIG. 8 is a perspective view of the overlapping fan-blade structure for fan wheel in accordance with a second embodiment;

FIG. 9 is a right side elevational view of FIG. 8 ;

FIG. 10 is a top plan view of FIG. 8 ;

FIG. 11 is a front elevational view of FIG. 8 ;

FIG. 12 is a bottom plan view of FIG. 8 ;

FIG. 13 is a left side elevational view of FIG. 8 ; and,

FIG. 14 is a rear elevational view of FIG. 8 .

The broken line showing of the fan blade attachment element is included for the purpose of illustrating environmental structure and forms no part of the claimed design.