| 摘要 |
Control of a liquid product in its movement through the pump chamber (38) of a trigger pump dispenser is achieved by a unitary valve member 15 (Fig.5) having an annular locating collar (114), a tubular skirt (112) surrounding the collar and arranged to form an outlet valve by engagement with the outer wall (138) of a double-walled tubular structure of the dispenser housing, and an imperforate dome (116) arranged to form an inlet valve by engagement with the inner wall of the tubular structure. The dome is mounted for movement towards and away from the inner wall and longitudinally of the pump chamber by circumferentially spaced flexible arms which are separated by holes (120) through which the product may pass in either direction. <IMAGE> <IMAGE> |
