The invention relates to a filter device for filtering fluid particularly in the form of an aqueous urea solution, comprising a filter housing (1) and a filter element (11) arranged therein, as well as a compensating element (31) for compensating fluctuations in the pressure and/or volume of the fluid, and characterised in that at least one elastically-flexible membrane (31) serves as the compensating element, the membrane wall of which is held in a retaining part (35) and maintains a separation between the fluid and a compressible filling medium such as a working gas.

Eine Filtervorrichtung zum Filtern von Fluid, insbesondere in Form einer wssrigen Harnstofflsung, mit einem Filtergehuse (1) und einem darin angeordneten Filterelement (11) sowie einem Ausgleichselement (31) zum Kompensieren von Druck- und/oder Volumenschwankungen des Fluids, ist dadurch gekennzeichnet, dass als Ausgleichselement mindestens eine elastisch nachgiebige Membran (31) eingesetzt ist, deren Membranwand in einem Halteteil (35) gehalten eine Trennung zwischen dem Fluid und einem kompressiblen Befllmedium, wic einem Arbeitsgas, vornimmt.

The filter assembly includes a threadless closure system for sealing a filter element of the filter assembly within a bowl of the filter assembly. The bowl is fluidly connectable to opposing fluid transfer passages. The filter element and a cover element connected to the filter element are received into the bowl. The filter element is retained in the bowl via a pin of the filter assembly that engages the cover element. The filter element may be removed and replaced without the unscrewing of threads exposed to an external environment external to the filter assembly during typical use of the filter assembly.

The filter assembly includes a threadless closure system for sealing a filter element of the filter assembly within a bowl of the filter assembly. The bowl is fluidly connectable to opposing fluid transfer passages. The filter element and a cover element connected to the filter element are received into the bowl. The filter element is retained in the bowl via a pin of the filter assembly that engages the cover element. The filter element may be removed and replaced without the unscrewing of threads exposed to an external environment external to the filter assembly during typical use of the filter assembly.

A liquid filter insert for a liquid filter has a prefilter element and a main filter element connected to the prefilter element. Prefilter element and main filter element are arranged on top of each other in an axial direction relative to a longitudinal axis of the liquid filter insert. A connection provides a flow path for liquid to flow from the prefilter element to the main filter element. The prefilter element is provided with a water separation unit and is further provided with a filter medium. The water separation unit is arranged between the filter medium of the prefilter element and the connection such that the liquid, after passing through the filter medium, flows through the water separation unit into the connection. The water separation unit has a water discharge channel for water separated from the liquid that extends axially at least partially through the main filter element.

A liquid filter insert for a liquid filter has a prefilter element and a main filter element connected to the prefilter element. Prefilter element and main filter element are arranged on top of each other in an axial direction relative to a longitudinal axis of the liquid filter insert. A connection provides a flow path for liquid to flow from the prefilter element to the main filter element. The prefilter element is provided with a water separation unit and is further provided with a filter medium. The water separation unit is arranged between the filter medium of the prefilter element and the connection such that the liquid, after passing through the filter medium, flows through the water separation unit into the connection. The water separation unit has a water discharge channel for water separated from the liquid that extends axially at least partially through the main filter element.

An oil filter retention device comprises a cup and a lid. The cup has an enlarged upper outer rim having an interior threaded portion. The interior wall of the cup also has a plurality of grip enhancing nubs. The lid is fashioned as a curvilinear upper portion and a frustoconical lower portion. A threaded portion circumscribes an exterior side wall the lid at a position between the upper portion and lower portion. The bottom of the lid is open ended. The lid is configured to removably secure to the cup.

A freezing resistant liquid filter including a housing having a liquid inlet and a liquid outlet and a freezing compensating filter element disposed within the housing and including a folded filter medium having a plurality of interstices and freezing compressible elements located at the interstices.

A freezing resistant liquid filter including a housing having a liquid inlet and a liquid outlet and a freezing compensating filter element disposed within the housing and including a folded filter medium having a plurality of interstices and freezing compressible elements located at the interstices.

A filter device for filtering hydraulic liquid is provided, which has a housing having a housing upper part and a housing lower part. The housing upper part has a housing inlet and a housing outlet. A filter element is arranged in the housing lower part. The filter element has a dirty side in communication with the housing inlet and a clean side in communication with the housing outlet. The housing upper part comprises a convexly curved interior wall. An insertable flow-guiding element is arranged in the housing upper part which divides the housing upper part into a dirty region and a clean region. The dirty region is in communication with the dirty side of the filter element and the housing inlet opens into the dirty region. The clean region is in communication with the clean side of the filter element and the housing outlet leads out of the clean region.

A fluidic system, comprising a pressure sensor which is arranged between a pump for moving a fluid in a fluid path and a heatable filter and a related method for moving of a fluid in a fluid path of a fluidic system, comprising the steps of: providing the fluid to the fluidic path; moving the fluid in a defined direction with a pump; sensing the pressure in the fluidic path with a pressure sensor which is arranged downstream of the pump; heating the fluid in the fluidic path in a heatable filter which is arranged downstream of the pressure senor; providing the filtered fluid downstream of the heatable filter.