| 主权项 |
1. A pump comprising:
a variable volume compartment defined between a chamber-forming body and a movable member movable relative to the chamber-forming body wherein movement of the movable member changes a volume of the variable volume compartment between a first volume and a second volume different than the first volume, a tubular valve casing elongate along a casing axis and defining a valve chamber therein, the valve chamber having an inner wall circular in cross-section along the axis, an inlet end and an outlet end, a valve member coaxially located within the valve chamber, the valve member comprising a stem extending axially within the valve chamber, an inlet disc extending radially outwardly from the stem to a distal end in engagement with wall, the inlet disc engaging the wall to prevent fluid flow axially therepast in a direction from the outlet end towards the inlet end, the inlet disc being resiliently deflectable to be deflected from engaging the wall to permit fluid flow axially therepast in a direction from the inlet end towards the outlet end, an outlet disc extending radially outwardly from the stem to a distal end in engagement with wall, the outlet disc engaging the wall to prevent fluid flow axially therepast in a direction from the outlet end towards the inlet end, the outlet disc being resiliently deflectable to be deflected from engaging the wall to permit fluid flow axially therepast in a direction from the inlet end towards the outlet end, the inlet disc spaced axially away from the outlet end from the outlet disc, the outlet disc spaced axially away from the inlet end from the inlet disc, an inlet into the valve chamber spaced axially away from the outlet end from the inlet disc, an outlet from the valve chamber spaced axially away from the inlet end from the outlet disc the outlet disc, a fluid transfer port in communication with the variable volume compartment and open into the valve chamber in between the inlet disc and the outlet disc. |
