| 摘要 |
<p>A two-stroke foam pump (10) includes a piston housing (22) and a piston assembly (44) retained therein, the interaction of the piston housing and piston assembly defining a compressible mixing chamber (25). Movement of the piston assembly within the piston housing in one direction increases the volume of the compressible mixing chamber to draw liquid and air therein, and movement of the piston assembly within the piston housing in a direct opposite thereto decreases the volume of the compressible mixing chamber to expel liquid and air from the compressible mixing chamber as a foam product.</p> |
