The ornamental design for a tipattachment, as shown and described.
FIG. 1 is a top front perspective view of the present invention.
FIG. 2 is a bottom rear perspective view thereof.
FIG. 3 is a right side bottom inside perspective view thereof
FIG. 4 is a left side bottom inside perspective view thereof.
FIG. 5 is a front elevation view thereof.
FIG. 6 is a rear elevation view thereof.
FIG. 7 is a left side elevation view thereof.
FIG. 8 is a right side elevation view thereof.
FIG. 9 is a top plan view thereof; and,
FIG. 10 is a bottom plan view thereof.
In the drawings, the broken lines indicate environmental subject matter that forms no part of the claimed design. No claim is made to portions that are not shown.