Invertable pump for liquid media
AssigneeIng. Erich Pfeiffer GmbH
InventorsLeo Maerte, Michael Wolter
Life of this patent
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Abstract
The thrust piston pump of a delivery apparatus for liquid media and the like is provided with a valve arrangement in the suction passage. The valve arrangement has two valve seats acting in opposing manner and is associated with a single common valve body. This permits a rapid transfer of the valve body into the closed position engaging on the valve seat, particularly during operation in an inverted position. In addition, the discharge passage has a mechanically openable discharge valve which can be simply opened by displacing the actuating head of the pump with respect to a collar of the pump piston.
Claims10
A delivery apparatus for discharging liquid media and the like from a storage chamber when the apparatus is disposed both in a normal upright position and in an opposite inverted position, said apparatus comprising:
- a thrust piston pump having a cylinder and a manually displaceable piston unit defining a pump chamber therein, the cylinder having a discharge passage for discharging the media from the pump and respective suction ports for filling the pump with the media in the normal upright position and in the inverted position;
- a valve arrangement for closing the suction port for the normal upright position, the valve arrangement comprising two valve closing seats arranged in an opposing manner to one another and a single common valve body member disposed between said two valve seats, one of said valve seats being closed by the single common valve body member when there is an overpressure condition in the pump chamber and the other of said valve closing seats being closed when the apparatus is in the inverted position and there is a vacuum condition in the pump chamber.
Dependencies are inferred from the claim text.