Patent ID: 6506303
Filing Date: 2003-01-14
Classification: B01D

Abstract:
A liquid filter arrangement comprisingan external filter housing with an interior surface defining a liquid chamber, a liquid inlet to the chamber, the chamber having a bottom end region, a liquid outlet from the chamber at the bottom end region, the housing having an upper end region terminating at an upper edge; a filter element disposed in the liquid chamber between the inlet and the outlet for filtering liquid passing from the inlet through the filter element to the outlet; a lid on the housing and extending into the upper end region of the filter housing, the lid being sealed in the upper end region of the filter housing; the filter element being detachably connected to the lid such that the filter element may be removed from the filter housing along with the lid; a tube in the housing, the tube including a tube portion toward the bottom end region of the chamber, a draining duct extending through a radially outer cylindrical surface of the tube portion and the draining duct communicating through the tube portion into the liquid chamber and a draining outlet from the housing communicating with the draining duct; the filter including an end piece disposed around the radially outer cylindrical surface of the tube portion to block the draining duct, the end piece being so shaped, of such length and so placed relative to an inlet to the draining duct that as the lid is removed with the filter element from the upper end region of the housing, the end piece moves off and opens the inlet to the draining duct for permitting liquid to drain out of the draining duct before the lid has been removed from the filter housing and before a sealing effect between the lid and the filter housing ceases.