The ornamental design for tower lift, as shown and described.
FIG. 1 is a rear perspective view of a tower lift of the present invention in a retracted position;
FIG. 2 is a left side elevation view of the tower lift of FIG. 1;
FIG. 3 is a rear elevation view of the tower lift of FIG. 1;
FIG. 4 is a right side elevation view of the tower lift of FIG. 1;
FIG. 5 is a front elevation view of the tower lift of FIG. 1;
FIG. 6 is a top plan view of the tower lift of FIG. 1; and,
FIG. 7 is a rear perspective view of the tower lift of FIG. 1 in an extended position. The extended bars are shown broken away to indicate that no specific height is being claimed.
The broken line showing of the bolts on the base of the tower lift is included for the purpose of illustrating elements of the tower lift and forms no part of the claimed design.
The broken lines on the ends of the bars at the top of the tower lift indicate that no specific length is claimed.