Patent ID: 9644508
Date: 2017-05-09
CPC Classifications: B01D,F01M

Claim:
1. A liquid filter, comprising: a filter housing having a removable cover and having a raw liquid inlet and a clean liquid outlet, a filter insert situated exchangeably in the filter housing and that separates a raw side and a clean side of the liquid filter from one another, the insert having a hollow cylindrical filter material body enclosed at its end faces by two end disks, the end disk that is a lower end disk in the installed state having a central mounting opening, the liquid filter having a filter bypass valve, for which purpose the end disk that is an upper end disk in the installed state having on its lower side a central valve seat that cooperates with a valve body, the filter housing further having a central discharge duct for emptying the filter housing when the filter insert is removed, and there being situated in the discharge duct a closing pin that is fixed to the housing in the installed state and that can be axially displaced between a closed position, assumed when the filter insert is installed and the cover is closed, and an open position, assumed when the cover is removed and the filter insert is removed, a valve body carrier connected to the closing pin, so as to be capable of axially limited displacement, the valve body carrier running through the filter insert and having a valve body of the filter bypass valve on its free end, and onto which the filter insert is arranged to be mounted with its end disk having the mounting opening forward, a spring supported on the filter housing which pre-loads the valve body carrier with a force, acting in the closing direction of the filter bypass valve, and the filter insert being arranged to exert, during or during and after its mounting onto the valve body carrier, a force acting directly on the closing pin in a direction toward the closing position of the closing pin.