| 摘要 |
This invention relates to an improved household drain plunger (10) for use with household drains of various shapes and sizes. The head section (21) of the plunger is a pleated bellows (18) consisting of a conical upper section (22) of increasing diameter from top to bottom, and a smaller lower section (23), also conical, of decreasing diameter from top to bottom. A handle (15) extends from the top of the head section (21). The bottom end of the plunger consists of three levels of seals (1, 2, and 7) depending from the bottom of the head section (21). The first and bottommost seal (1) is a dual-function seal designed to fit snugly into a typical kitchen sink drain opening, there by providing a mechanical seal. This first seal (1) also has a flat bottom comprising an annular ring that can be placed around a small drain hole opening, such as that in a bathroom sink or tub, to provide a pressure/sucti on seal with the drain opening. The annular ring has a center void (19) which opens to the interior of the bellows (18). The second seal (2), disposed between the bellows (18) and the top of the first seal (1), is designed to f it snugly into a typical garbage disposal opening, thus providing a mechanical seal with the opening. The bottom most bellows pleat (3) comprises the third seal (7). This third seal (7) forms a pressure/suction seal with the surface surrounding a drain opening, and is also dual-function, as it is used either alone or in conjunction with the second seal (2), depending upon the size of the drain opening.
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