Sump filter with filter element cartridge
AssigneeFiltertek Inc.
InventorsAndrew Boast, Larry Larkin
Life of this patent
Estimating the term…
Abstract
A sump filter assembly wherein a filter element that may or may not be removably disposed in a filter housing is sealingly engaged with the filter housing by way of a sealing member to separate the filter housing cavity between dirty and clean spaces. The filter element is provided with filtration material with a portion thereof embedded in the filter element, the filter element is further provided with a sealing member retaining shoulder to ensure proper placement of the sealing member in the assembly, with the sealing member being an O-ring or gasket member, among other things, and a bypass valve for cold flow of transmission fluid is optionally provided.
Claims40
An automatic transmission sump filter assembly in fluid communication with the suction inlet of an automatic transmission fluid pump comprising:
- (a) a filter housing having a base portion with a bottom portion and a filter chamber, an inlet through the bottom portion in fluid communication with the sump and in fluid communication with the filter chamber, and an outlet member portion angularly extending from the base portion and defining an outlet in fluid communication with the filter chamber and the tubular inlet of the automatic transmission fluid pump, wherein the outlet member portion includes one or more stiffeners extending along the exterior of the outlet member portion and terminating before the outlet member to form one or more ends;
- (b) at least one outlet sealing member disposed on the outlet member portion and engaged against the end of one or more stiffeners of the outlet member, wherein the outlet sealing member is in sealing engagement with the outlet member and the automatic transmission fluid pump inlet, and wherein the outlet sealing member abuts one or more stiffener ends;
- (c) filtration material forming an envelope;
- (d) a ribbed plastic filter element, removably disposed in the filter chamber, having at least one edge of the filtration material envelope embedded therein, at least one rib supporting the filtration material, and at least one shoulder adapted to receive at least one sealing member;
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- (e) at least one sealing member disposed in the filter element shoulder, wherein the sealing member is in a first sealing engagement with the filter housing and the filter element, whereby the filter chamber is divided by the filtration material, filter element, and sealing member into a clean transmission oil chamber that communicates with the suction inlet of the transmission fluid pump and a dirty transmission oil chamber that directly communicates with the sump via the inlet in the bottom of the base portion.
A sump filter assembly in fluid communication with the inlet of a pump comprising:
- (a) a housing having a bottom portion, one or more stand off members extending generally parallel to the bottom portion and adapted to engage the sump, and a chamber, an inlet through the bottom portion in fluid communication with the sump and in fluid communication with the chamber, an outlet member portion angularly extending from the housing and defining an outlet in fluid communication with the chamber thereby defining a fluid flow path between the inlet and outlet through the chamber, and an access hole, and wherein the outlet member portion includes one or more stiffeners extending along the exterior of the outlet member portion and terminating before the outlet member to form one or more ends;
- (b) at least one outlet sealing member disposed on the outlet member portion and engaged against the end of one or more stiffeners of the outlet member, wherein the outlet sealing member is in sealing engagement with the outlet member and the automatic transmission fluid pump inlet, and wherein the outlet sealing member abuts one or more stiffener ends;
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- (c) a filter element disposed through the housing access hole, the filter element comprising:
- (i) a ribbed plastic member having a frame and at least one sealing member retaining shoulder,
- (ii) filtration material, with a portion of the filtration material embedded in the ribbed plastic frame and supported by one or more plastic ribs, and
- (iii) at least one sealing member disposed against the sealing member retaining shoulder and sealingly engaging the housing wall in the housing chamber, whereby the filter element is disposed in the fluid flow path between the housing inlet and outlet to thereby filter sump fluid into a clean fluid cavity.
Dependencies are inferred from the claim text.