Hermetically sealed transmission filter

Liquid purification or separation – Filter – Within flow line or flow line connected close casing

Patent

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Details

210450, 210453, 55491, 55502, 55503, 29902, 264DIG48, B01D 3502, F01M 1103

Patent

active

048265985

ABSTRACT:
An automatic transmission fluid filter is disclosed, comprised of a metal base member, a plastic cover member attached to the base member, enclosing a volume. Filtration material inside the volume is interposed between an inlet and outlet to the filter. A plastic overmold around the periphery of the union of the metal and plastic members hermetically seals the filter except at the inlet and outlet. In a preferred embodiment, the metal base member includes a flanged edge which is secured to a flanged edge of the cover member by the overmold. Slots through the flange of the base member allow plastic of the overmold to flow through, connecting together plastic on both sides of the flange. Also, the base member flange ends curled lip embedded in the plastic of the overmold. Edge sections of the filtration material extend to and between the union of the base and cover members over some sections of the edge of the filter. At those sections the cover member has a raised lip which is configured to be backed up by a portion of the mold section during the overmolding process. In the other section during the overmolding process. In the other sections a mating elevation and depression in flanges of the cover and base members mechanically lock the members and prevent them from sliding relative to each other.

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