Oil filter cartridge and housing for an oil filter cartridge
AssigneeHengst GmbH & Co. KG
InventorWilhelm Ardes
Life of this patent
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Abstract
A filter cartridge includes a filter element (forming a fluid channel with a first longitudinal axis) with a front side to which a front end cap is sealingly attached, a conduit (with rear and front ends) attached to the front end cap, and a through hole (in the front end cap) that provides a fluid communication between the channel and the conduit, to enable oil flow from the channel via the rear end of the conduit through the conduit to its front end. Pressure drop for a given oil flow rate is reduced if the conduit has a straight end section (defining a second longitudinal axis) in the vicinity of its front end. The second longitudinal axis intersects the first longitudinal axis at a single point to define a non-zero angle α between the axes.
Claims16
A filter cartridge comprising at least:
- a filter element having a front side and a rear side and forming a fluid channel with a first longitudinal axis, the fluid channel configured to transport fluid along the first longitudinal axis in operation of the filter cartridge,
- a front end cap including
- a front seal flange having a through hole, and
- a straight conduit having a second longitudinal axis, a front conduit end and a rear conduit end and affixed to a surface of the front seal flange at the through hole,
- wherein the front end cap is sealingly attached to the front side of the filter element such as to establish fluid communication and enable a fluid flow, during said operation, from the fluid channel through the front seal flange and through the straight conduit,
- wherein a line defined by a parallel projection of the second longitudinal axis onto a plane, which is parallel to the second longitudinal axis and which contains the first longitudinal axis, intersects the first longitudinal axis at a single point and is inclined with respect to the first longitudinal axis at an angle
- to define an asymmetric gap, when the filter cartridge is installed in an axially-symmetric tubular housing structure, between the front end cap and the housing structure to reduce a pressure drop of oil flowing to the filter element during said operation.
A system comprising:
- a housing body having a housing axis, and
- the filter cartridge enclosed by the housing body,
- wherein the filter cartridge includes:
- a filter element having a front side and a rear side and forming a fluid channel with a first longitudinal axis, and
- a front end cap including
- a front seal flange having a through hole, and
- a straight conduit having a second longitudinal axis and affixed to a surface of the front seal flange at the through hole,
- wherein the front end cap is sealingly attached to the front side of the filter element such as to establish fluid communication and enable a fluid flow, during an operation of the system, from the fluid channel through the front seal flange and through the straight conduit, and
- wherein a line defined by a parallel projection of the second longitudinal axis onto a plane, which is parallel to the second longitudinal axis and which contains the first longitudinal axis, is inclined with respect to the first longitudinal axis at an angle α>0° and intersects the first longitudinal axis at a single point;
- and
- wherein the housing body includes:
- a housing bottom with a socket, the socket comprising an oil inlet and an oil outlet,
- a housing top including a canister having a bottom and a sidewall, wherein the canister is configured to sealingly cover the socket and to provide a space dimensioned to accommodate the filter cartridge in between the socket and the bottom;
- wherein the socket is configured to provide support for the front end cap of the filter cartridge,
- wherein the socket defines the housing axis to be substantially orthogonal to a plane of the front seal flange,
- wherein the oil outlet comprises a cylindrical surface configured to receive the straight conduit,
- wherein the second longitudinal axis intersects the housing axis at a single point to define an angle β of inclination of the second longitudinal axis with respect to the housing axis and to provide a guiding surface configured to guide the straight conduit along the second longitudinal axis to provide a sealing engagement of the cylindrical surface with the straight conduit.
Dependencies are inferred from the claim text.