Abstract: On a lubricating oil fill line for an internal combustion engine, provided with an oil mist sediment tank installed in the fill area and designed to ensure the crank case ventilation, the oil flowing out of the oil mist sediment tank is recycled by the gravity force back to the crank case as return oil. This system has the following features: for the return oil is provided a return line from the oil mist sediment tank; the distal end of this return line relative to the sediment tank leads to the bottom area of a transfer tank especially designed to receive and recycle the return oil; a gas pressure is exerted at the overflow outlet of the overflow tank which corresponds to that to which the oil mist is submitted when back to the sediment tank. Such a facility permits to save space during the manufacture process.

Abstract: A snap-lock connection for two parts (1, 2) which canrotate in relation to each other has radially resilient locking hooks (3) arranged in a ring, supported on the ring-shaped edge of a matching body and secured against unlocking in the radial direction by a fixing ring (6). The fixing ring (6) and/or the body that form the ring-shaped edge (5) are designed as a ring which is secured to one of the parts (1, 2) exclusively by individual webs (7) spaced apart around its circumference.

Abstract: A lubricating oil filter for internal combustion engines is disclosed herein. The oil filter includes a vertical housing closed at the top by a screw cover and includes a filter support rotatably mounted on the screw cover for removably supporting an annular filter element. The filter support includes a valve element at a bottom end thereof for closing an additional outlet port at the bottom of the housing when the cover and filter support are installed on the housing and for opening the additional outlet port when the cover and filter support are removed from the housing.

Abstract: An oil filter for internal combustion engines is disclosed herein. The filter includes a housing with a bottom arranged below an open top and a screw-on cover threadedly engaged within the open top. The housing includes an inlet duct, a first oil discharge duct in the bottom of the housing, and a second oil discharge duct in the bottom of the housing and coaxially surrounding the first oil discharge duct. A support part is provided within the housing having a first end which is connected to the cover in an axially force-transmitting manner and a second free end inserted into the first oil discharge duct when the cover fully threadedly engaged to the open end of said housing to sealingly close the first discharge duct, and is withdrawn from the discharge duct when the cover is removed from the open end of the housing to enable discharging of oil from the housing via the first oil discharge duct.

Abstract: An oil filter has a cap screwed to the approximately upright arranged filter housing of the oil filter for the cleaning of lubricating oil, with a ring-shaped filter insert being detachably fastened on the cap and separating the outer inflow space from the inner flow-off space. In the lower zone of the filter housing, provision is made for a valve-like acting member, which is automatically opened with each change of the filter insert and serves for discharging oil that remained in the filter housing into an oil-collecting space via a discharge duct. A center bar is rotatably connected with the cap. The center bar is axially displaceable in a limited way and has in its zone close to the cap a piston-like flange, which is sealed against the filter insert and separates the inflow space from the flow-off space. The center bar has, in its lower end zone, the valve-like acting member cooperating with the discharge duct.