Staircase machine

Description

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.

Claims

The ornamental design for a staircase machine, as shown and described.