Patent ID: 8241262

Claim:
An aspirator assembly, comprising: a pad, including— a liquid impermeable bottom layer having a peripheral margin; a liquid permeable upper layer having a peripheral edge and an upper face, said upper layer presenting a plurality of openings therethrough operable to permit flow of liquid through the upper layer, the peripheral margin of said bottom layer and the peripheral edge of said upper layer being joined to cooperatively define a plenum chamber between the bottom and upper layers, said upper face of said upper layer being remote from said bottom layer; a cellular sheet having a base sheet presenting a periphery, and a plurality of substantially uniformly shaped, discrete, air-containing, laterally spaced apart cells defined by respective cell walls extending upwardly from said base sheet throughout a cellular area of the base sheet spaced inwardly from said periphery thereof, said cells having a maximum lateral dimension, with the maximum lateral dimensions of the cells being greater than the heights of the cells above said base sheet, the spaces between said cells defining liquid flow passageways, there being a series of openings through the base sheet communicating with said liquid flow passageways, said cellular sheet located within said plenum with said cell walls proximal to said upper layer and said base sheet proximal to said bottom layer, there being unrestricted upper and lower zones respectively above said cell walls and below said base sheet, said cell walls and said base sheet being free of connection with said upper layer and said bottom layer, respectively, throughout said cellular area, such that fluid passing through said openings may move laterally above said cells in said unrestricted upper zone and between said cells, and fluid passing through said openings may move laterally below said base sheet; a porous sheet member overlying the upper face of said upper layer, said sheet member including a plurality of capillary passages therethrough, each capillary passage having a conical surface with a smaller open end and a larger open end, each capillary passage oriented such that the smaller open end thereof is proximal to said upper layer, such that the smaller open ends of the capillary passages are closer to the upper layer than the larger open ends thereof; and a negative pressure device operably coupled with said pad and communicating with said lower zone, said device operable to remove fluids collected in said lower zone.