| 摘要 |
An improved foam piston pump in which a multiple of air pumps (170, 270, 370) are disposed coaxially about a piston member (22) and spaced axially along the piston member (22), preferably coaxially with a liquid pump (70) for discharging air and liquid as foam. Each air pump is preferably provided by a modular piston (150, 250, 350) within a modular casing assembly (20) such that arrangements with one, two or more identical air pumps can be assembled from a plurality of the same modular components. |
