Abstract:
Ansaugpumpe zur Flüssigkeitsförderung mit einem Sockel, der einen Flußeinlaß, einen Flußauslaß und zwischen diesen ein Steuerventil definiert. Die Ansaugpumpe weist ein auf dem Sockel montiertes Gehäuse mit einem in einem Einlaßventilraum positionierten Einlaßstromventil und mit einem in einem Auslaßventilraum positionierten Auslaßstromventil auf. Die Ventilräume stehen mit einer Kolbenkammer in Verbindung, die einen axial beweglichen Kolben aufweist. Ein federvorgespannter Stellknopf ist an den Kolben und an das Steuerventil zum Steuern seiner Position zwischen einer Direktflußstellung und einer Vorbeiführungsstellung angebaut. Wenn das Steuerventil in der Vorbeiführungsstellung steht, wird durch die Aufwärtsbewegung des Stellknopfes Flüssigkeit in den Einlaßventilraum und in die Kolbenkammer gesaugt. Der Abwärtshub des Stellknopfes drückt die Flüssigkeit aus der Kolbenkammer heraus.
Abstract:
The present invention relates in general to a fluid filter incorporating a plastic shell and a replaceable fluid filter cartridge. More specifically, the present invention relates to configuring the shell so that it will only accept, in terms of proper functioning, a cooperatively-configured replaceable fluid filter cartridge. One of the emerging technologies in terms of fluid filter construction is the enlargement of the threaded connection interface between the molded plastic shell and the fluid-delivery head, accompanied by the elimination of the typical or traditional nutplate. In one embodiment of this design concept, the shell is molded out of plastic and the outer cylindrical surface of the shell adjacent the open end of the shell is externally threaded. This threaded surface of the shell is used to attach the shell, and in turn the fluid filter assembly, to the head. This style of shell is configured for use with a spin-on style of filtration system as part of a disposable fluid filter assembly. Some end users of the type of filtration systems described above enjoy the advantages gained from a replaceable fluid filter cartridge. Therefore, it would be an advance in the state of the art to configure the molded plastic shell, generally as described above, but configured to accept a replaceable fluid filter cartridge. Related to the acceptance of a replaceable cartridge is the inability of the shell to accept a spin-on style of filter as part of a disposable, single-use system. The fluid filter construction disclosed herein is directed to providing this capability by the design of a novel and unobvious fluid filter endplate with cooperative modifications to the upper exposed edge of the shell that defines the open end of the shell.
Abstract:
A filter within a filter cartridge design is described that includes a sealing structure on an endplate of an outer filter element. Generally, the sealing structure includes an annular flange on the endplate that can directly seal against an interior surface of a housing when the filter cartridge is assembled for use. During filtration, the annular flange prevents a working fluid from bypassing the outer filter element. The sealing flange can seal with the housing in a press fit engagement.