Vacuum

This application is related to U.S. Provisional application Ser. No. 63/624,004, filed on Jan. 23, 2024, and entitled “Portable Vacuum Cleaner.” The contents of this related application is herein incorporated by reference in its entirety. FIG. 1 is a front perspective view for an embodiment of a vacuum; FIG. 2 is a back perspective view thereof; FIG. 3 is a front elevation view thereof; FIG. 4 is a back elevation view thereof; FIG. 5 is a left elevation view thereof; FIG. 6 is a right elevation view thereof; FIG. 7 is a top elevation view thereof; FIG. 8 is a bottom elevation view thereof; FIG. 9 is a front perspective view for another embodiment of a vacuum; FIG. 10 is a back perspective view thereof; FIG. 11 is a front elevation view thereof; FIG. 12 is a back elevation view thereof; FIG. 13 is a left elevation view thereof; FIG. 14 is a right elevation view thereof; FIG. 15 is a top elevation view thereof; FIG. 16 is a bottom elevation view thereof; FIG. 17 is a front perspective view for another embodiment of a vacuum; FIG. 18 is a back perspective view thereof; FIG. 19 is a front elevation view thereof; FIG. 20 is a back elevation view thereof; FIG. 21 is a left elevation view thereof; FIG. 22 is a right elevation view thereof; FIG. 23 is a top elevation view thereof; and, FIG. 24 is a bottom elevation view thereof. Any dashed lines in the drawings illustrate portions of the vacuum, user interface, user interface for a vacuum and/or portions thereof that form no part of the claimed design. The dot-dashed lines illustrate unclaimed borders around portions of the subject matter being claimed. The surface shading and contour lines (including any CAD or wire frame lines) in the drawings is a drawing convention to represent character and contour; it does not illustrate material, surface ornamentations, or surface decoration and forms no part of the claimed design.