Liquid filter, in particular an oil filter

Patent metadata

Field	Value
Publication number	US-9427682-B2
Application number	US-201213588640-A
Country	US
Kind code	B2
Filing date	Aug 17, 2012
Priority date	Aug 18, 2011
Publication date	Aug 30, 2016
Grant date	Aug 30, 2016

Abstract

The invention relates to a liquid filter, having a filter housing, which contains a receiving space for a ring filter element. The liquid filter further has a no-load duct, which is opened when the ring filter element is taken out. A pin is formed on a lower end disc of the ring filter element, the pin projects parallel to the longitudinal axis. A ramp is formed on the bottom of the receiving space. The ramp is matched to the pin in such a manner that, when the ring filter element is inserted into the filter housing, the pin slides downwards on the ramp and penetrates the opening of the no-load duct. A structure is in the receiving space, the structure allows functional insertion of the ring filter element if the ring filter element slides with its pin along the ramp until the pin penetrates the opening of the no-load duct.

First claim

The invention claimed is:

1. An oil filter for purifying lubricating oil for an internal combustion engine of a motor vehicle, comprising:
a filter housing having a receiving space and a ring filter element having a longitudinal axis arranged in the receiving space of the filter housing for filtering a liquid,
the filter housing including an inlet for raw liquid and an outlet for cleaned liquid,
a no-load duct, which is opened when the ring filter element is taken out, a pin being integrally formed on a lower end disc of the ring filter element, which pin projects parallel to the longitudinal axis and eccentrically, and which penetrates an opening of the no-load duct in a sealing manner when the ring filter element is inserted into the filter housing,
a ramp disposed on a bottom of the receiving space, wherein the ramp extends circumferentially about the longitudinal axis from the bottom with a lower end at the opening of the no-load duct and rises axially with increasing ramp length into the interior of the receiving space,
wherein the ramp and the pin are matched to each other in such a manner that when the ring filter element is inserted into the filter housing the pin as long as it has not yet penetrated the opening of the no-load duct engages on the ramp and slides towards the bottom when the ring filter element is rotated about the longitudinal axis and penetrates the opening of the no-load duct at the lower end of the ramp, and
at least one structure arranged adjacent to the ramp in the receiving space, the at least one structure preventing insertion of the ring filter element into the receiving space unless the pin of the ring filter element engages and slides along the ramp until the pin penetrates the opening of the no-load duct at the lower end of the ramp,
wherein the at least one structure includes at least one rib, and wherein the at least one rib extends in a radial direction transversely to the ramp with respect to the longitudinal axis, and
wherein the at least one structure further includes a plurality of positioning ribs, wherein the plurality of positioning ribs are arranged on an inner wall of the filter housing facing the ring filter element and extend in an axial direction and bear against the ring filter element when the ring filter element is arranged in the receiving space of the filter housing.

2. The filter according to claim 1 , wherein the at least one of the structure and the ramp are arranged on the filter housing or on a functional carrier which is inserted in the filter housing.

3. The filter according to claim 1 , wherein the at least one structure projects beyond the ramp or is disposed lower than the ramp with respect to the bottom.

4. The filter according to claim 1 , wherein the at least one rib extends in the radial direction transversely to the ramp and wherein the at least one rib is disposed at least on a radial outside of the ramp with respect to the longitudinal axis.

5. The filter according to claim 4 , wherein the at least one rib further includes a plurality of radially extending ribs, and wherein a circumferential spacing of the ribs is reduced in a direction towards the lower end of the ramp.

6. The filter according to claim 1 , wherein the plurality of positioning ribs form an integral component of the structure.

7. The filter according to claim 1 , wherein the at least one rib includes a plurality of ribs extending in the radial direction transversely to the ramp, wherein the plurality of ribs are disposed on both radial sides of the ramp with respect to the longitudinal axis, the plurality of ribs configured to prevent rotation of the ring filter element about the longitudinal axis when the pin slips off the ramp.

8. A liquid filter for an internal combustion engine, comprising:
a filter housing defining a receiving space having a receiving space bottom and including an inlet for raw liquid and an outlet for cleaned liquid;
a ring filter element received by the receiving space and having a longitudinal axis, the ring filter element including an axially projecting pin disposed on an axial end and arranged eccentrically with respect to the longitudinal axis;
a no-load duct disposed at the receiving space bottom and having an opening configured to receive the pin when the ring filter element is received by the receiving space;
a ramp disposed at the receiving space bottom configured to guide the pin when the ring filter element is received by the receiving space, the ramp extending circumferentially about the longitudinal axis from the receiving space bottom with a lower end at the opening of the no-load duct and rising axially with increasing ramp length into the interior of the receiving space, wherein the pin engages on the ramp and slides towards the receiving space bottom when the ring filter element is rotated about the longitudinal axis and penetrates the opening of the no-load duct at the lower end of the ramp; and
a structure disposed in the receiving space bottom next to the ramp, wherein the structure prevents the ring filter element from being received by the receiving space in an operational state unless the pin engages and slides along the ramp, and wherein the ring filter element is in the operational state when the pin penetrates the opening of the no-load duct at the lower end of the ramp;
wherein the structure includes at least one rib extending in a circumferential direction along the ramp, and wherein the at least one rib is arranged at least on a radial outside of the ramp with respect to the longitudinal axis; and
wherein the at least one rib extends in the circumferential direction and includes a radially extending branch rib, and wherein the branch rib is arranged at least one of (i) between the at least one rib and the filter housing, and (ii) between the at least one rib and the ramp.

9. The filter according to claim 8 , wherein the least one rib extends in the circumferential direction at least 180° along the ramp.

10. The filter according to claim 8 , wherein the at least one other rib extending in the circumferential direction projects beyond the ramp with respect to the bottom of the receiving space.

11. The filter according to claim 8 , wherein the at least one rib projects beyond the ramp with respect to the bottom and defines a lateral guide as the pin slides along the ramp.

Assignees

• Kiemlen Ralf
• Genc Engin
• Mahle Int Gmbh

Inventors

• Kiemlen Ralf
• Genc Engin

Classifications

• F01M11/03 Primary

  Mounting or connecting of lubricant purifying means relative to the machine or engine; Details of lubricant purifying means (filters B01D) · CPC title

• B01D35/153

  Anti-leakage or anti-return valves · CPC title

• B01D29/96

  in which the filtering elements are moved between filtering operations; Particular measures for removing or replacing the filtering elements; Transport systems for filters (B01D29/09, B01D29/70 take precedence) · CPC title

• B01D35/16

  Cleaning-out devices {, e.g. for removing the cake from the filter casing or for evacuating the last remnants of liquid} · CPC title

• B01D2201/291

  End caps · CPC title