Abstract: The invention relates to a fuel filter (1) with a device for separating water from the fuel. This device comprises at least one filter screen element (6) placed in a filter housing (2) which is located downstream a filter element (3) for the filtration of particles from the fuel, a tank (15) located under the filter screen element (6) at the filter housing (2) in which the separated water droplets are collected, and a device for deviating the fuel between the filter element (3) and the filter screen element (6).

Abstract: The invention concerns a filter insert (1) that is provided as an exchangeable insert in an oil filter of an internal combustion engine, as well as a corresponding oil filter. The oil filter comprises a filter housing (3) separable along a separating plane (2) and the exchangeable filter insert (1). Two housing parts (4, 5) of the filter housing (3) are sealed relative one another along the separating plane (2) by means of a seal (6). The seal (6) is captively secured on the filter insert (1).

Abstract: A liquid filter suitable for motor vehicles which includes a filter head (11), a vessel (12) and a filter element (16) disposed within the vessel (12) sealingly separating an inlet (14) from an outlet (15) such that liquid from the inlet must flow through the filter element to reach the outlet. The filter element (16) has guide projections (27, 28) positioning the filter element (16) within the vessel (12). Prior to installation, the filter element (16) is preassembled into the vessel (12) and fixed in position by pushing the filter element (16) into an element guide (29), after which the preassembly is screwed onto the filter head (11). When the vessel (12) is unscrewed from the filter head (11), the filter element (16) slides out of the element guide (29) and moves axially upwardly to free a volume V. Liquid flowing into the vessel (12) from the higher regions of the liquid filter (10) can flow into this volume, thus enabling drip-free replacement of the filter element.

Abstract: A liquid circuit for filtering a liquid, comprising a liquid storage vessel (10), a liquid pump (17), a consumer or user device (14), a filter element (23) and a controller (24). A heated liquid can be supplied at least partly to the filter element (23). The liquid circuit may be used in liquid systems in which a liquid, such as water, oil or fuel, is filtered and at least part of the liquid is returned to the storage vessel (10). The liquid is pumped in the liquid circuit from the storage vessel (10) by the pump (17) through lines (11, 13, 15, 16), filtered by filter element (23) and supplied to the consumer device (14). Excess liquid not required by the consumer device (14) is returned through liquid return line (15) to the controller (24) which directs the liquid either to the filter element (23) or the storage vessel (10), depending on the liquid temperature.

Abstract: A circuit for filtering a liquid, comprising a storage vessel (10), a pump (17), a consumer device (14), a filter element (23) and a controller (24). The circuit maybe used in systems where liquid, e.g. water, oil or fuel, is filtered and at least part thereof is returned to the storage vessel. Liquid is pumped in the circuit from the storage vessel by the pump through lines (11, 13, 15, 16), filtered by filter (23) and supplied to the consumer device. Excess liquid not required by the consumer device (14) is returned via return line (15) to the controller (24) which directs the liquid either to the filter or the storage vessel—depending on liquid temperature. The controller (24) and the filter are arranged in a common housing (18) having connectors for an unfiltered liquid inlet (19), a filtered liquid outlet (20), a liquid return (21) and a liquid outlet (22). The connectors (19–22) enable rapid assembly of the circuit.

Abstract: A fuel filter having a housing, a filter element disposed inside the housing, and an electromagnetically operable valve (50) disposed in the lower region of the fuel filter, which valve operates both an outlet (5) for discharging water and an inlet for supplying air. The valve has a single electromagnet (32) with an axially displaceable core (34) on which both a valve member (37) for the water discharge valve and a valve member (42) for the air supply valve are disposed.

Abstract: An apparatus for storing water separated from fuels by a fuel filter is provided. The apparatus includes an absorber connected to a water accumulator of the fuel filter. The stored water may then be released again through heating or pressure using commercially available components and supplied to a further use.

Abstract: A filter element with a cylindrical structure having a filter medium 11 mounted to a support element 10. The filter medium 11 is fastened to the support element 10 in such a way that no relative movement between these components is possible. This creates a heavy-duty assembly between filter medium and support element and increases filter life. It is thus possible for the filter to withstand a pulsating load, e.g., caused by backwashing of the filter medium, without risk of destroying the sensitive filter medium due to vibrations or any relative movement between the support element and the filter medium. This assembly may be produced by mounting the filter medium under tension to the support element and by fixing it with a reinforcement strip 12. The use of valves with switching times of less than 0.4 seconds makes it possible to achieve extremely short backwash pulses to clean the filter without risk of failure of the filter medium.

Abstract: A liquid circuit for filtering a liquid, comprising a liquid storage vessel (10), a liquid pump (17), a consumer or user device (14), a filter element (23) and a controller (24). A heated liquid can be supplied at least partly to the filter element (23). The liquid circuit may be used in liquid systems in which a liquid, such as water, oil or fuel, is filtered and at least part of the liquid is returned to the storage vessel (10). The liquid is pumped in the liquid circuit from the storage vessel (10) by the pump (17) through lines (11, 13, 15, 16), filtered by filter element (23) and supplied to the consumer device (14). Excess liquid not required by the consumer device (14) is returned through liquid return line (15) to the controller (24) which directs the liquid either to the filter element (23) or the storage vessel (10), depending on the liquid temperature.

Abstract: An apparatus for storing water separated from fuels by a fuel filter is provided. The apparatus includes an absorber connected to a water accumulator of the fuel filter. The stored water may then be released again through heating or pressure using commercially available components and supplied to a further use.

Abstract: A fuel filter 10 for filtering diesel fuel, in which a heater 14 is provided which at temperatures below 0° C. warms the diesel fuel in order to liquefy the diesel fuel so that a filter element 13 will not clog. The heater 14 includes a heat transfer body 29 onto which a supporting layer 35 is applied, which is thermally stable and electrically insulating. On this supporting layer 35 a heating element is provided which heats the thermal transfer body 29. A protective layer 37 is disposed over the heating element 34 in order to protect it.

Abstract: A filter element with a cylindrical structure having a filter medium 11 mounted to a support element 10. The filter medium 11 is fastened to the support element 10 in such a way that no relative movement between these components is possible. This creates a heavy-duty assembly between filter medium and support element and increases filter life. It is thus possible for the filter to withstand a pulsating load, e.g., caused by backwashing of the filter medium, without risk of destroying the sensitive filter medium due to vibrations or any relative movement between the support element and the filter medium. This assembly may be produced by mounting the filter medium under tension to the support element and by fixing it with a reinforcement strip 12. The use of valves with switching times of less than 0.4 seconds makes it possible to achieve extremely short backwash pulses to clean the filter without risk of failure of the filter medium.