US 11,931,675 B2
Filter element, liquid filtering device comprising such a filter element and vehicle comprising such a liquid filtering device
Thomas Grange, Lyons (FR); and François Giroud, Lyons (FR)
Assigned to VOLVO TRUCK CORPORATION, Gothenburg (SE)
Appl. No. 16/973,840
Filed by VOLVO TRUCK CORPORATION, Gothenburg (SE)
PCT Filed Jun. 22, 2018, PCT No. PCT/EP2018/066815
§ 371(c)(1), (2) Date Dec. 10, 2020,
PCT Pub. No. WO2019/242866, PCT Pub. Date Dec. 26, 2019.
Prior Publication US 2021/0113943 A1, Apr. 22, 2021
Int. Cl. B01D 29/21 (2006.01); B01D 29/58 (2006.01); B01D 35/153 (2006.01); B01D 35/16 (2006.01); B01D 35/30 (2006.01)
CPC B01D 29/21 (2013.01) [B01D 35/153 (2013.01); B01D 29/58 (2013.01); B01D 35/16 (2013.01); B01D 35/30 (2013.01); B01D 2201/295 (2013.01); B01D 2201/34 (2013.01); B01D 2201/4076 (2013.01)] 34 Claims
OG exemplary drawing
 
1. A filter element comprising:
a filter medium configured with an annular shape, having a central axis and forming inside a central channel extending substantially axially;
first and second end plates, each plate covering and being sealingly mounted on one axial end of the filter medium, the first end plate having a central opening substantially coaxial with the central axis and in fluid communication with the channel;
a central perforated rigid tube that extends axially between the first and second end plates and having an inner perforated wall delimiting the central channel the filter element being designed to be placed in a filter housing for forming a liquid filtering device, whereby a liquid to be filtered can flow along a liquid path through the filter medium ds the channel and out of the filter element through the central opening,
wherein the filter element further comprises an anti-rotation device configured to cooperate with an anti-rotation device formed in the filter housing so as to prevent rotation of the filter element with respect to the filter housing when the filter element is inserted in the filter housing and during the entire installation process of the filter element into the filter housing,
wherein
the central perforated rigid tube comprises at least one guiding path, arranged inside the central perforated rigid tube, adapted to generate, by contact with a following member of a rotatable central element of the filter housing, at least a first, progressive rotational movement of the rotatable element of the filter housing when the filter element is mounted in the filter housing during a first translation movement along the central axis:
said at least ne guiding path comprises at least one portion of a helical path for obtaining the first, progressive rotational movement, and the helical path extends on less than half of an inner periphery of the central perforated rigid tube in order to generate a rotation of the rotatable element inferior to one half of a turn,
wherein the guiding path is adapted to generate, when the filter element is dismounted from the filter housing during a second translation movement along the central axis in the opposite direction with respect to the first movement, a second rotational movement of the rotatable element, in the opposite direction with respect to the progressive rotational movement, this second rotational movement occurring at the beginning of the second translation movement, wherein the guiding path comprises an insertion section, which comprises the helical path, and a dismounting section, which comprises a portion with an angle of inclination that, when measured with respect to the central axis of the filter element, is greater than the angle of inclination of the helical path of the insertion section.