Staircase Machine

FIG. 1 is a front, right, top perspective view of a staircase machine, showing my new design;

FIG. 2 is a rear, left, bottom perspective view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a right side view thereof;

FIG. 7 is a top plan view thereof;

FIG. 8 is an enlarged view of detail 8 in FIG. 1 ;

FIG. 9 is an enlarged view of detail 9 in FIG. 3 ; and,

FIG. 10 is an enlarged view of detail 10 in FIG. 7 .

The dashed broken lines in the figures are for the purposes of illustrating portions of the staircase machine that form no part of the claimed design.

The dash-dot-dash broken lines are for notating enlarged views and form no part of the claimed design.