초록 ▼

A spin-on filter assembly is comprised of a plastic can and a plastic base wherein the plastic base is threaded into the can and secured in place by a rib on the base which seats within a V-shaped slot in the can. In order to have the base separable from the can so the filter may be rebuilt upon rem

A spin-on filter assembly is comprised of a plastic can and a plastic base wherein the plastic base is threaded into the can and secured in place by a rib on the base which seats within a V-shaped slot in the can. In order to have the base separable from the can so the filter may be rebuilt upon removing and replacing the filter element containing the filter media, the rib on the base has both a leading and trailing frustoconical surface. The trailing frustoconical surface on the base enables the base to cam the open end of the housing apart when the base is unscrewed from the can so as to allow the base to be separable from the can. In an alternative configuration, the base has a rib with a flat trailing surface that extends perpendicular to the base. Consequently, there is no base surface provided for caming the open end of the can apart by engaging complimentary frustoconical portion of the groove in the can.

대표청구항 ▼

1. A filter assembly comprising:an annular can having a first end portion and a second end portion, the first end being closed and the second end being open, the can being adapted to receive a filter element a filter element; disposed in said can; an interior wall surface in the annular can, the int

1. A filter assembly comprising:an annular can having a first end portion and a second end portion, the first end being closed and the second end being open, the can being adapted to receive a filter element a filter element; disposed in said can; an interior wall surface in the annular can, the interior wall surface having a coupling portion adjacent the second end of the can, the coupling portion having a radially disposed annular groove therein and a threaded section inboard of the groove disposed about a first axis; a base having openings therethrough adapted to provide inlet and outlet openings for fluid being circulated through the housing, the base having an external threaded portion disposed about a second axis for receipt in the internal threaded section of the interior wall surface of the can with the first and second axes being coaxial, the base further having a radially projecting rib for receipt in the annular groove in the wall of the can to provide an arrangement for locking the base within the can.