Patent ID: 8181833

Claim:
A harness for a backpack vacuum cleaner comprising, in combination: a back plate adapted to be mounted to a body desired to be carried on a back of a user; a mounting plate slideably mounted in a vertical direction to the back plate; two shoulder straps each including an upper end attached to the mounting plate to move therewith and a lower end attached to the back plate and below and spaced from the upper end in the vertical direction, with the lower end of each of the two shoulder straps being attached to the back plate at a connection point, with the mounting plate being slideable in the vertical direction relative to the back plate to adjust positions of the upper ends of the two shoulder straps relative to the lower ends of the two shoulder straps in the vertical direction; a length-adjustable strap including an upper end mounted to the mounting plate to move therewith and a lower end fixed relative to the back plate, with the strap extending vertically along an intermediate portion of the back plate between the two shoulder straps, and with the strap being adjustable in length according to a body length of the user, with the connection points being spaced from each other and on opposite sides of the vertical direction; a waist strap fixed to the back plate between the connection points and adapted to be mounted around a waist of the user for carrying the body, with the back plate including an intermediate portion and two flexible sections attached on two opposite sides of the intermediate portion by two fold lines defining two pivot axes, with the connection points located on the two flexible sections, with the two flexible portions respectively pivotable relative to the two opposite sides of the intermediate portion about the two pivot axes, with the two flexible portions being flexible to curl intermediate the connection parts and the two fold lines, and with the connection points moving due to the two flexible sections flexing to curl and folding about the two fold lines to pivot about the two pivot axes spaced from each other and on the opposite sides of the vertical direction due to movement of shoulders of the user, with the back plate including a groove extending in the vertical direction; and a screw including a head on a side of the back plate and a shank slideably extending from the head through the groove to another side of the back plate and fixed to the mounting plate.