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US 8,147,691 B2Granted
Filter cartridge housing attachment systems
AssigneeBaldwin Filters, Inc.
InventorsTimothy L. Krull, Farrell F. Calcaterra
Life of this patent
Estimating the term…
Abstract
The present disclosure pertains to a fluid filter having integral attachment means which may take the form of a threaded portion of a filter cartridge. The threaded portion threadably interacts with a complementary threaded portion of a filter mounting to retain the filter cartridge to the filter mounting. The disclosure also pertains to a fluid filter having a cartridge made from two plastic shells welded together. The disclosure also pertains to a fluid filter with filter media positioned within a filter cartridge by an end cap with extending ribs welded to one of the two shells which compose the filter cartridge.
Claims25
A filter apparatus, comprising:
- a filter cartridge having upper and lower shells forming a housing, the upper shell having an upper end wall and an upper annular wall, the lower shell having a lower end wall and a lower annular wall, the upper annular wall extending from the upper end wall toward the lower end wall, lower annular wall extending from the lower end wall toward the upper end wall, the upper and lower walls being connected, at least one opening in the upper end wall for providing fluid communication, filter media permanently and irremovably joined to the upper shell and arranged to filter fluid, and wherein the lower annular wall extends over and around the upper shell to provide a skirt, wherein the skirt of the lower annular wall defines a retention structure adapted for releasable attachment of the filter cartridge.
A filter apparatus, comprising:
- a filter cartridge, including
- a housing having upper and lower shells connected together to define a internal cavity;
- filter media arranged in internal cavity to filter fluid passing through the filter media between an inlet and an outlet, the filter media separating water from the fluid when fluid is passed therethrough, the filter media being adjacent to, and at least partially surrounded by, at least a portion of an annular wall of the lower shell;
- the lower shell being at least partially transparent for indicating water in the internal cavity;
- and
- a drain valve on the housing adapted to be opened for draining water from the internal chamber.
3 more elements
A filter apparatus, comprising:
- a filter cartridge having upper and lower shells forming a housing, the upper shell having an upper end wall and an upper annular wall, the lower shell having a lower end wall and a lower annular wall, the upper annular wall extending from the upper end wall toward the lower end wall, lower annular wall extending from the lower end wall toward the upper end wall, the upper and lower walls being connected, at least one opening in the upper end wall for providing fluid communication, a ring of filter media sealingly bonded to the upper shell and arranged to filter fluid, wherein the lower shell forms a mounting bowl, and wherein the upper shell is releasably connected to the lower shell such that the upper shell and the filter media are removable and disposable while the mounting bowl can be reusable.
A filter apparatus, comprising:
- a filter cartridge having upper and lower shells forming a housing, the upper shell having an upper end wall and an upper annular wall, the lower shell having a lower end wall and a lower annular wall, the upper annular wall extending from the upper end wall toward the lower end wall, lower annular wall extending from the lower end wall toward the upper end wall, the upper and lower walls being connected, at least one opening in the upper end wall for providing fluid communication, filter media arranged to filter fluid in the housing, and wherein a projecting skirt is provided along the housing, wherein the projecting skirt defines a plurality of discrete retention tabs integrally molded into the projecting skirt at different angular locations, and wherein the projecting skirt is formed exclusively in the lower shell, independent of the upper shell.
A filter cartridge, comprising:
- upper and lower shells forming a housing, the upper shell having an upper end wall and an upper annular wall, the lower shell having a lower end wall and a lower annular wall, the upper annular wall extending from the upper end wall toward the lower end wall, lower annular wall extending from the lower end wall toward the upper end wall, the upper and lower walls being connected;
- a first opening in the upper end wall for providing fluid communication, a first seal member disposed along the first opening;
- a ring of filter media arranged in the housing;
- a flow reversing end cap inside the housing and sealingly attached to one end of the filter media, the flow reversing end cap having a second opening generally concentric with the first opening and a second seal member disposed along the second opening;
- a second end cap sealingly attached to another end of the filter media;
- ribs disposed between the housing and the flow reversing end cap, the ribs integrally joining the flow reversing end cap and the housing.
3 more elements
Dependencies are inferred from the claim text.