A "no filter, no operation" attachment, a fluid filter assembly, and a method for operating a fluid filter assembly.

Abstract

A “No Filter, No Operation” essay (101), comprising: a housing (110) defining a fluid passage from an upstream fluid opening (113) at a first end for a fluid receiving connection with a filter cartridge (304) to a downstream fluid opening (111) at a second end, wherein the housing (110) is dimensioned and shaped for connection to a fluid pump inlet (302) such that the fluid pump inlet (302) can be arranged annularly around an outer circumference of the housing (110), wherein the housing (110) comprises an annular flange (112) arranged around the outer circumference of the housing (110) and surrounding the downstream fluid opening (111) of the housing, wherein the annular flange (112) is designed for connection with the fluid pump inlet (302), and wherein the housing (110) defines a pin opening (115) at the first end which is dimensioned to receive a pin (310) of the filter cartridge (304); a divider (121) that divides the fluid passage into an upstream section comprising the upstream fluid orifice (113) and the pin orifice (115), and a downstream section comprising the downstream fluid orifice (111), wherein the divider (121) defines an internal orifice that allows a fluid connection between the upstream section and the downstream section; and a sphere (140) which is arranged in the upstream section in fluid flow receiving connection with the upstream fluid opening (113), wherein the sphere (140) has a larger diameter than a diameter of the inner opening, so that effective contact of the sphere (140) with the divider (121) inside the inner opening blocks the fluid connection between the upstream section and the downstream section.

Description

TECHNICAL AREA

[0001] The present disclosure relates generally to filter systems with a replaceable filter element. BACKGROUND

[0002] Internal combustion engines generally burn a mixture of fuel (e.g., gasoline, diesel, natural gas, etc.) and air. Before entering the engine, fluids such as fuel and oil are typically passed through filter elements to remove impurities (e.g., particulate matter, dust, water, etc.) before they reach the engine. The filter elements must be replaced regularly because the filter medium traps and removes these impurities from the fluids flowing through it. In some cases, unauthorized or non-original replacement filter elements may be installed in the filter systems during maintenance. These unauthorized and non-original replacement filter elements may be of inferior quality compared to original and authorized filter elements.The use of unauthorized or non-original replacement filter elements can lead to damage to the engine, as contaminants can penetrate through the filter element.

[0003] Some motor and filter systems employ various functions to protect motor integrity (“EIP”), such as the implementation of “no filter, no run” (NFNR) systems. In an NFNR system, the motor will either not run at all or will run at limited capacity (e.g., in a limp-home mode) if no filter element is installed in the filter system or, in some cases, if an unsuitable filter element is installed. However, many motor and filter systems are not equipped with such EIP functions. These systems are therefore vulnerable to damage when operated without a filter element or with unsuitable replacement filter elements.

[0004] US 2015 / 0273369 A1 discloses a filter system comprising a specific filter cartridge with a geometric projection therein and a filter cartridge housing. The filter cartridge housing includes a valve that controls the fluid flow from the filter system, a filter cartridge housing, and a filter cartridge housing cover. The valve has an opening that is wedged against the geometric projection such that the geometric projection engages in the opening and actuates the valve. DE 112008001593 T5 discloses a "no filter, no operation" filter system designed to ensure that a filter cartridge is present to prevent damage to fuel injectors, associated fuel components, etc., as well as engine malfunctions. If no filter cartridge is installed, the fuel flow to the engine is completely prevented or allowed only in an amount insufficient for engine operation.To ensure sufficient fuel flow for engine operation, a suitably designed filter cartridge must be used. SUMMARY

[0005] The invention is described in the attached set of claims. One embodiment relates to a "no filter, no operation" attachment. The attachment comprises a housing that defines a fluid passage from an upstream fluid opening at a first end for a fluid-receiving connection with a filter cartridge to a downstream fluid opening at a corresponding second end and is shaped for connection to the fluid pump inlet, wherein the housing further defines a pin opening at the first end which is dimensioned to receive a pin from the filter cartridge.The attachment further comprises a divider that divides the fluid passage into an upstream section, comprising the upstream fluid orifice and the pin orifice, and a downstream section, comprising the downstream fluid orifice. An inner opening on the divider defines this opening, allowing fluid communication between the upstream and downstream sections. The attachment includes a ball located in the upstream section in fluid flow reception connection with the upstream fluid orifice. The ball is dimensioned to have a larger diameter than the inner opening, ensuring effective contact between the ball and the divider within the inner opening and thus blocking fluid communication between the upstream and downstream sections.

[0006] Another embodiment relates to a fluid filter assembly. The assembly comprises a filter cartridge with a filtration medium arranged around a filter frame that defines a central bore with a pin projecting into one end of the central bore. The assembly further comprises a pump inlet arranged in the central bore. The assembly includes a "no filter, no operation" attachment connected to the pump inlet in the central bore. The attachment comprises a housing that defines a fluid passage from an upstream fluid port at a first end for a fluid-receiving connection with a filter cartridge to a downstream fluid port at a corresponding second end, and is dimensioned and shaped to be coupled to the pump inlet, the housing further defining a pin opening through which a pin from the filter cartridge is guided.The attachment further comprises a divider that divides the fluid passage into an upstream section, comprising the upstream fluid orifice and the pin orifice, and a downstream section, comprising the downstream fluid orifice. The divider defines an inner opening that allows fluid communication between the upstream and downstream sections. The attachment includes a ball that is positioned in the upstream section in fluid flow reception connection with the upstream fluid orifice and is dimensioned to have a larger diameter than the inner opening. Contact between the ball and the divider within the inner opening blocks the fluid communication between the upstream and downstream sections. The pin prevents contact between the ball and the divider.

[0007] Another embodiment comprises a method for operating a fluid filter assembly, which includes a connection for a "no filter, no operation" attachment. The "no filter, no operation" attachment comprises a housing that defines a fluid passage from an upstream fluid opening at a first end for a fluid-receiving connection with a filter cartridge to a downstream fluid opening at a corresponding second end, and is dimensioned and shaped such that it can be coupled to the pump inlet, the housing further defining a pin opening through which a pin from the filter cartridge can be guided.The "No Filter, No Operation" attachment further comprises a divider that separates the fluid passage into an upstream section, comprising the upstream fluid orifice and the pin orifice, and a downstream section, comprising the downstream fluid orifice. The divider defines an inner opening that allows fluid communication between the upstream and downstream sections. The "No Filter, No Operation" attachment also includes a ball located in the upstream section in flow-receiving contact with the upstream fluid orifice. The ball is dimensioned to have a larger diameter than the inner opening, such that contact between the ball and the divider within the inner opening blocks fluid communication between the upstream and downstream sections.In special embodiments, a filter cartridge is connected to the "No filter, no operation" attachment, wherein the filter cartridge includes the pin which prevents contact between the ball and the divider when entering the pin opening.

[0008] These and other characteristics, as well as the organization and nature of its operation, can be found in the following detailed description in conjunction with the accompanying drawings. List of characters Fig. Figure 1 is an exploded view of an NFNR attachment according to an exemplary embodiment. Fig. 2A is a side cross-sectional view of the in Fig. 1 NFNR paper shown. Fig. 2B is a frontal cross-sectional view of the in Fig. 1 NFNR paper shown. Fig. 3A is a side cross-sectional view of a section of a filter assembly that includes the NFNR attachment. Fig. 1 and includes an original or authorized filter element. Fig. 3B is a side cross-sectional view of a section of a filter assembly that includes the NFNR attachment. Fig. 1 and includes a non-original or unauthorized filter element. DETAILED DESCRIPTION

[0009] The illustrations generally depict a retrofittable NFNR attachment for existing filter systems lacking the "No Filter, No Operation" motor protection element. This attachment is advantageous for manufacturers who initially do not require the "No Filter, No Operation" motor protection feature but later deem it necessary. The attachment can be connected to an existing filter system without significant modifications to the head of the existing system. The NFNR attachment prevents the system supplied by the filter (e.g., an internal combustion engine) from operating without a filter element. Furthermore, the NFNR attachment prevents the system supplied by the filter from being operated with an unauthorized or non-original replacement filter element. The NFNR attachment protects against damage to downstream components of the filter system and malfunctions of the system in which the filter system is used.

[0010] In relation to Fig. Figure 1 shows an exploded view 100 of an NFNR attachment 101 according to an exemplary embodiment. The NFNR attachment 101 comprises a housing 110, a cage 120, a nozzle 130, and a ball 140. In some arrangements, the housing 110, the cage 120, and the nozzle 130 can be formed independently of one another and subsequently assembled in the NFNR attachment 101. In other arrangements, the features of at least the housing 110 and the cage 120 are formed as a single structure.

[0011] The housing 110 is an outer housing of the NFNR attachment 101. In some arrangements, the NFNR attachment 101 is designed separately and clearly separated from the fluid inlet and can be retrofitted to the fluid inlet. The housing 110 can be made of various plastics selected to provide a robust housing while resisting damage and wear due to the action of fluid flows, including flows of diesel or unleaded fuel (e.g., plastics). The housing 110 defines an upstream fluid opening 113 at a first end and a downstream fluid opening 111 at a corresponding second end, which is dimensioned and shaped to allow coupling with the fluid inlet of a filter system. In some arrangements, an annular flange 112 is arranged around the outer circumference, surrounding the downstream fluid opening 111.Furthermore, in some arrangements, the first end of the housing 110 additionally defines a pair of snap openings 114 and a pin opening 115.

[0012] The cage 120 comprises features dimensioned and shaped to define a fluid flow within the housing 110. In some arrangements, the cage 120 further comprises one or more snap-in projections 123 configured to engage through corresponding snap openings 114 in the housing 110 for snap-in assembly. The cage 120 includes a divider 121 spanning a cross-section of the fluid flow and defining an internal opening 122 that allows fluid to pass from one side of the divider 121 to the other side of the divider 121.

[0013] In various arrangements, the nozzle 130 is made of a material selected to provide a tight or substantially tight engagement with the divider 121 at the inner opening 122 and with the ball 140 (e.g., rubber). The nozzle 130 defines an annular groove 132 structured to engage the inner circumference of the inner opening 122, and a concentric through-hole 131 structured to provide a fluid flow path from one side of the divider 121 to the other side of the divider 121 when installed in the cage 120. While the ball 140 is substantially spherical in one embodiment, it is understood that in various arrangements the ball 140 may not be perfectly or substantially spherical, but rather have an elongated, oval, or other shape. The ball 140 is configured to be in operative engagement with the divider 121, i.e.,The sphere 140 interacts with the divider (either through direct or indirect contact) in such a way that the fluid flow through the inner opening 122 and / or the through-hole 131 is blocked. The sphere 140 has a larger diameter than the through-hole 131 and, in some arrangements, is of a lower density than the fluid filtered by an associated filter assembly. The sphere 140 is structured for transitional engagement with the divider 121 at the inner opening 122 and / or the through-hole 131. Accordingly, in one arrangement, a fluid flow can push the sphere 140 upwards against the nozzle 130 and block the through-hole 131, thus preventing the flow of fluid through the divider 121. Conversely, when the fluid flow decreases, the sphere 140 can disengage from the nozzle 130 and expose the through-hole 131.

[0014] With regard to the Fig. 2A and Fig. Figure 2B shows a side cross-sectional view 200 and a front cross-sectional view 250 of the assembled NFNR attachment 101. The nozzle 130 is connected to the divider 121 of the cage 120, and the cage 120 is installed in the housing 101. Snap-in protrusions are arranged in various configurations through corresponding snap openings 114 in the housing to secure the connection between the cage 120 and the housing 110. During assembly, fluid flow is defined through the upstream fluid opening 113 of the housing 110, the through-hole 131, and the downstream fluid opening 111 of the housing 110. Additionally, the divider 121 divides the fluid flow with respect to the direction of flow of the fluid through the fluid stream into an upstream section 202 and a downstream section 204. The sphere 140 is arranged in the upstream section 202.Thus, a fluid flow into the upstream fluid opening 113 can push the ball 140 towards and partially into the through-bore 131 of the nozzle 130, preventing the fluid flow from reaching the downstream section 204. Additionally, in some arrangements, a projection 206 extending from an inner wall of the housing 110 can be configured such that the ball 140 is positioned adjacent to the through-bore 131, preventing the ball 140 from being pinched or trapped away from the nozzle 130 at any position within the upstream section 202.

[0015] Fig. Figure 3A shows a first arrangement 300 of a fluid filter assembly in which the NFNR attachment 101 is connected to a pump inlet 302 located in a central bore of an original or authorized fluid filter 304. The pump inlet 302 is connected to a fluid pump (e.g., an electric fluid pump, a mechanical fluid pump, etc.) that draws a fluid from a reservoir (e.g., fuel, oil, hydraulic fluid, water, etc.) through the original fluid filter 304 into the NFNR attachment 101 and into the pump inlet 302. The filtered fluid in the pump inlet 302 is then supplied to a system, e.g., an internal combustion engine, via the associated pump.

[0016] In the first arrangement 300, the housing 110 of the NFNR attachment 101 is connected to the pump inlet 302 by an engagement section 312 of the pump inlet 302. In the illustrated arrangement, the engagement section 312 is a circumferential extension of an outer housing of the pump inlet 302, which is arranged annularly around the outer circumference of the annular flange 112 of the housing 110 and is then pressed against the annular flange 112. In some arrangements, the NFNR attachment 101 is fixedly connected to the pump inlet 302, so that subsequently removing the NFNR attachment 101 would damage the pump inlet 302 and / or otherwise interrupt the operation of the pump inlet 302.

[0017] The original fluid filter 304 comprises a filtration medium 306, which is operationally connected to a filter frame 308 arranged within it. In various configurations, the filtration medium 306 can be arranged as corrugated fluid filter material in an overall cylindrical shape with a filter frame 308 concentrically oriented within it as a cylinder. The filter frame 308 defines the central bore in which the pump inlet 302 and the coupled NFNR attachment 101 can be arranged, as well as several side wall openings that allow a fluid connection between the filtration medium 306 and the upstream fluid opening 113 of the NFNR attachment 101. Additionally, the filter frame 308 includes a pin 310 arranged in the central bore, which corresponds to the size and location of the pin opening 115 of the housing 110.When connecting an original fluid filter 304 to the pump inlet 302, the pin 310 is positioned through the pin opening 115 so that a tip of the pin 310 rests against the nozzle 130.

[0018] During operation, the NFNR attachment 101 is mounted and connected to the pump inlet 302. The original fluid filter 304 is then connected to the pump inlet 302, with the pin 310 positioned in the pin opening 115 and between the nozzle 130 and the ball 140. An associated fluid pump is actuated (e.g., by actuating a related internal combustion engine), resulting in a fluid flow 314 through the filtration medium 306 and into the upstream fluid opening 113 of the NFNR attachment 101. The fluid flow 314 encounters and flows into the ball 140; however, the pin 310 prevents the ball 140 from entering and blocking the through-bore 131. Thus, the fluid flow 314 can flow around the pin 310 and the ball 140, through the through-bore 131, into the downstream section 204 of the NFNR attachment 101, into the pump inlet 302 and then into the system (e.g. into the internal combustion engine).

[0019] With reference to Fig. Figure 3B shows a second arrangement 350 of a fluid filter assembly connecting the NFNR attachment 101 with a pump inlet 302, which is arranged in a central bore of a non-original or unauthorized fluid filter 352. In the second arrangement 350, the pump inlet 302 and the NFNR attachment 101 can be structured in a substantially similar manner to that shown in the first arrangement 300. Fig.3A is described. However, the non-original fluid filter 352 is missing the pin 310 of the first arrangement 300. During operation, the fluid flow 314 can thus push the ball 140 into the through-bore 131 of the nozzle 130. The engagement of the ball 140 in the nozzle 130 effectively prevents the fluid flow 314 from reaching the pump inlet 302, so that the fluid flow 314 does not enter the system (e.g., the combustion engine). Similarly, if the fluid filter is not connected to the pump inlet 302, the fluid flow 314 can push the ball 140 into the through-bore 131 and block the fluid flow 314.

[0020] The NFNR attachment 101 provides a retrofit solution for filter systems originally designed without an NFNR motor protection element. The NFNR attachment can be connected to these filter systems without significant modifications to the pump inlet 302. The NFNR attachment 101 helps prevent potential system damage (e.g., to the internal combustion engine) that can result from the installation of non-approved or non-original filter elements, or from the absence of a filter element in a related filter system. This EIP feature would therefore reduce or eliminate warranty claims related to the system.

[0021] It should be noted that the term "example", as used here to describe various embodiments, is intended to indicate that such embodiments are possible examples, representations and / or illustrations of possible embodiments (and that such a term is not necessarily intended to imply that such embodiments are exceptional or outstanding examples).

[0022] The term "connected" and the like, as used herein, means the direct or indirect connection of two elements. This connection can be stationary (e.g., permanent) or movable (e.g., removable or detachable). This connection can be achieved by the two elements, or the two elements and any further intermediate elements, being integrally formed as a single, unified body, or by the two elements, or the two elements and any further intermediate elements, being attached to one another.

[0023] It should be noted that the structure and arrangement of the various exemplary embodiments serve only for illustration. Although only some embodiments have been described in detail in this disclosure, those skilled in the art will readily recognize upon reading this disclosure that many modifications are possible (e.g., variations in sizes, dimensions, structures, shapes, and sections of the various elements, values ​​of parameters, assembly arrangements, use of materials, colors, orientations, etc.) without significantly deviating from the novel teachings and advantages of the subject matter described herein. Unless otherwise stated, for example, elements shown to be formed in one piece may be constructed from several parts or elements, the position of the elements may be reversed or otherwise varied, and the type or number of separate elements or positions may be changed or varied.The sequence or order of process steps can be varied or rearranged according to alternative embodiments. Further substitutions, modifications, changes, and omissions can also be made in the design, operating conditions, and arrangement of the various exemplary embodiments without deviating from the scope of the present invention.

Claims

[1] A “No filter, no operation” essay (101), comprising: a housing (110) defining a fluid passage from an upstream fluid opening (113) at a first end for a fluid receiving connection with a filter cartridge (304) to a downstream fluid opening (111) at a second end, wherein the housing (110) is dimensioned and shaped for connection to a fluid pump inlet (302) such that the fluid pump inlet (302) can be arranged annularly around an outer circumference of the housing (110), wherein the housing (110) comprises an annular flange (112) arranged around the outer circumference of the housing (110) and surrounding the downstream fluid opening (111) of the housing, wherein the annular flange (112) is designed for connection with the fluid pump inlet (302), and wherein the housing (110) defines a pin opening (115) at the first end which is dimensioned to receive a pin (310) of the filter cartridge (304); a divider (121) that divides the fluid passage into an upstream section comprising the upstream fluid orifice (113) and the pin orifice (115), and a downstream section comprising the downstream fluid orifice (111), wherein the divider (121) defines an internal orifice that allows a fluid connection between the upstream section and the downstream section; and a sphere (140) which is arranged in the upstream section in fluid flow receiving connection with the upstream fluid opening (113), wherein the sphere (140) has a larger diameter than a diameter of the inner opening, so that effective contact of the sphere (140) with the divider (121) inside the inner opening blocks the fluid connection between the upstream section and the downstream section. [2] The attachment (101) according to claim 1, wherein the sphere (140) has a lower density than a fluid of the fluid stream. [3] The attachment (101) according to claim 1, further comprising a nozzle (130) which is coupled concentrically within the inner opening to the divider (121) and defines a through-hole (131) which provides a fluid connection between the upstream section and the downstream section. [4] The attachment (101) according to claim 3, wherein the nozzle is made of a material that enables leak-proof contact with both the divider (121) and the ball (140). [5] The attachment (101) according to claim 1, wherein the divider (121) is formed as part of a cage (120) arranged in the housing (110). [6] The attachment (101) according to claim 5, wherein the cage (120) has at least one snap projection and the housing (110) has at least one corresponding snap opening (114), and wherein the cage (120) is secured in the housing by a snap connection of the at least one snap projection in the at least one corresponding snap opening (114). [7] The attachment (101) according to claim 1, wherein the annular flange (112) is designed for connection by crimping to the fluid pump inlet (302). [8] The attachment (101) according to claim 1, wherein the housing (110) has an inner projection in the upstream section, wherein the inner projection is structured such that it positions the ball (140) next to the inner opening. [9] A fluid filter assembly comprising: a filter cartridge (304) with a filtration medium (306) arranged around a filter frame (308) defining a central bore with a pin (310) projecting into one end of the central bore; a fluid pump inlet (302) arranged in the central bore; and a “no filter, no operation” attachment (101) connected to the fluid pump inlet (302) in the central bore, comprising the following: a housing (110) defining a fluid passage from an upstream fluid opening (113) at a first end for a fluid-receiving connection with a filter cartridge (304) to a downstream fluid opening (111) at a corresponding second end, which is dimensioned and shaped for coupling to the fluid pump inlet (302) such that the fluid pump inlet (302) can be arranged annularly around an outer circumference of the housing (110), wherein the housing (110) comprises an annular flange (112) arranged around an outer circumference of the housing and surrounding the downstream fluid opening (111) of the housing (110), wherein the annular flange (112) is designed for connection with the fluid pump inlet (302), and wherein the housing (110) further defines a pin opening (115) through which a pin (310) from the filter cartridge (304) is guided; a divider (121) that divides the fluid passage into an upstream section comprising the upstream fluid orifice (113) and the pin orifice (115), and a downstream section comprising the downstream fluid orifice (111), and has an internal orifice that allows a fluid connection between the upstream section and the downstream section; and a sphere (140) which is arranged in the upstream section in fluid flow receiving connection with the upstream fluid opening (113) and is dimensioned such that it has a larger diameter than the inner opening, so that contact of the sphere (140) with the divider (121) inside the inner opening blocks the fluid connection between the upstream section and the downstream section; wherein the pin (310) prevents the ball (140) from contacting the divider (121). [10] Assembly according to claim 9, wherein the sphere (140) has a lower density than a fluid of the fluid flow. [11] Assembly according to claim 9, further comprising a nozzle (130) which is connected concentrically within the inner opening to the divider (121) and defines a through-hole (131) which provides a fluid connection between the upstream section and the downstream section. [12] Assembly according to claim 11, wherein the nozzle is made of a material that enables leak-proof contact with both the divider (121) and the ball (140). [13] Assembly according to claim 9, wherein the divider (121) is formed as part of a cage (120) arranged in the housing (110). [14] Assembly according to claim 13, wherein the cage (120) has at least one snap projection and the housing has at least one corresponding snap opening (114), and wherein the cage (120) is held in the housing (110) by a snap connection of the at least one snap projection in the at least one corresponding snap opening (114). [15] Assembly according to claim 9, wherein the annular flange (112) is designed for connection to the fluid pump inlet (302) by crimping. [16] Assembly according to claim 9, wherein the housing (110) has an inner projection in the upstream section, wherein the inner projection is structured such that it positions the ball (140) next to the inner opening. [17] Assembly according to claim 9, wherein the pump inlet is formed as a structure separate from the “No filter, no operation” attachment (101). [18] A method for operating a fluid filter assembly, comprising: Connection of a "No Filter, No Operation" attachment (101) to a pump inlet, wherein the "No Filter, No Operation" attachment (101) comprises the following: a housing (110) defining a fluid passage from an upstream fluid opening (113) at a first end for a fluid-receiving connection with a filter cartridge (304) to a downstream fluid opening (111) at a corresponding second end, which is dimensioned and shaped for coupling to the pump inlet, such that the fluid pump inlet (302) can be arranged annularly around an outer circumference of the housing (110), wherein the housing (110) comprises an annular flange (112) arranged around an outer circumference of the housing and surrounding the downstream fluid opening (111) of the housing (110), wherein the annular flange (112) is designed for connection with the fluid pump inlet (302), and wherein the housing (110) further defines a pin opening (115) through which a pin (310) from the filter cartridge (304) can be guided; a divider (121) that divides the fluid passage into an upstream section comprising the upstream fluid orifice (113) and the pin orifice (115), and a downstream section comprising the downstream fluid orifice (111), and has an internal orifice that allows a fluid connection between the upstream section and the downstream section; and a sphere (140) which is arranged in the upstream section in fluid flow receiving connection with the upstream fluid opening (113) and is dimensioned such that it has a larger diameter than the inner opening, so that contact of the sphere (140) with the divider (121) inside the inner opening blocks the fluid connection between the upstream section and the downstream section. [19] The method of claim 18, further comprising: Coupling the filter cartridge (304) with the "No filter, no operation" attachment (101), wherein the filter cartridge (304) encompasses the pin (310) which enters the pin opening (115) and thus prevents contact between the ball (140) and the divider (121). [20] Method according to claim 18, wherein the divider (121) is formed as part of a cage (120) arranged in the housing (110). [21] Method according to claim 18, wherein the “No filter, no operation” attachment (101) further comprises a nozzle (130) which is coupled concentrically within the inner opening to the divider (121) and defines a through-hole (131) which provides a fluid connection between the upstream section and the downstream section. [22] Method according to claim 21, wherein the nozzle is made of a material that enables leak-proof contact with both the divider (121) and the ball (140). [23] Method according to claim 18, wherein the coupling of the “No filter, no operation” attachment (101) with the pump inlet is a permanent coupling.

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