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The ornamental design for a lever adaptor for door knobs, as shown and described. |
FIG. 1 is a front elevational view of the lever adaptor for door knobs showing my new design;
FIG. 2 is a rear elevational view thereof;
FIG. 3 is an enlarged left side elevational view thereof;
FIG. 4 is an enlarged right side elevational view thereof;
FIG. 5 is a top plan view thereof;
FIG. 6 is a bottom plan view thereof; and,
FIG. 7 is a front elevational view thereof showing the design in a closed position; and,
FIG. 8 is a cross-sectional view thereof taken along ling 8--8 of FIG. 7, the stippling representing a gripping surface.
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