Patent ID: 7347386

Claim:
A sprayer with a changeable volume comprising: a container comprising: a lower circumferential wall formed as a rigid structure, with the lower circumferential wall including an upper circumferential end section and defining a lower space; an upper circumferential wall circumferentially connected to the upper circumferential end section of the lower circumferential wall and extending from the lower circumferential wall in a vertical direction for a height to define an upper space for containing water, with the height of the upper circumferential wall being extensible and compressible generally parallel to the vertical direction, wherein the upper circumferential wall is extensible generally parallel to the vertical direction between a contracted position, a plurality of intermediate positions and an expanded position, wherein the volume of the upper space is changeable between the contracted position, the plurality of intermediate positions and the expanded position; and a strap restraining the upper circumferential wall against the lower circumferential wall, wherein the strap is extendable between the contracted position, the plurality of intermediate positions and the expanded position for restraining the upper circumferential wall; a pump positioned in the lower space; a first pipe led to the pump to supply water thereto; a second pipe led to the exterior of the container from the pump; and a nozzle connected to the second pipe.