| 摘要 |
<p>A dispenser pump has a base (3) incorporating an intake tube (4), an axially-upright cylindrical pump body (2) fixed on top of the base (3) by a screw-threaded engagement, and a cap plunger (1) having a piston (18) which sweeps the interior of the body (2). A discharge spout (7) opens from a discharge opening (9) adjacent the base (3). Both the outlet and inlet openings are valved by a one-piece valve body (10) in the form of a free-standing sleeve (102) resting on the base (3), with a peripheral lip (103) forming the outlet valve at one end of the sleeve and a radially-inward projection (100,106) forming the inlet valve as a flexible flap. The body (2) and base (3) are separable to release the valve body (10) for easy cleaning.</p> |
