An oil deterioration prevention device is provided that can prevent an increase in pressure loss by reducing oilflow resistance. The oil deterioration prevention device may include a filtering unit with a filter element that filters oil, and a deterioration prevention unit having a powdery deterioration prevention agent that prevents deterioration of oil, wherein out of oil fed from an oil containing unit, oil filtered by the filtering unit is fed to a part to be lubricated, and oil that is prevented from being deteriorated by the deterioration prevention unit is returned to the oil containing unit or sent to the part to be lubricated.

An oil deterioration prevention device is provided that can prevent an increase in pressure loss by reducing oilflow resistance. The oil deterioration prevention device may include a filtering unit with a filter element that filters oil, and a deterioration prevention unit having a powdery deterioration prevention agent that prevents deterioration of oil, wherein out of oil fed from an oil containing unit, oil filtered by the filtering unit is fed to a part to be lubricated, and oil that is prevented from being deteriorated by the deterioration prevention unit is returned to the oil containing unit or sent to the part to be lubricated.

An adhesive applied to an inner side of a bottom surface of a plate having a substantially hollow cylindrical shape with a closed bottom fixes one end of the filter material and the plate to each other. A plurality of projections located at different positions in a circumferential direction are formed on the plate, and a leading end of each of the projections comes into contact with the filter material.

A filter element has a first end cap and a ring of filter media. The first end cap includes structures projecting from the periphery to form a keyed connection with a filter bowl and filter head. Some of the projections are fixed lugs, while other projections are latch fingers arranged to move in an axial direction during mounting and dismounting of the filter assembly components. The filter element first end cap is configured to mate with the upper end of a filter bowl to form an element/bowl assembly. The mated structures of the element and bowl form the male part of a bayonet connection. The filter head defines a corresponding female bayonet connector part. The latch fingers retain the element to the bowl and the assembled element and bowl to the filter head.

A filter arrangement for threadably securing to a filter head includes a housing having a surrounding wall defining an interior volume, an open mouth providing access to the interior volume and an end opposite of the open mouth. The surrounding wall has an exterior and an interior. A filter media construction is operably held within the interior volume. A sleeve, distinct from the housing, is secured to the exterior of the surrounding wall adjacent to the housing mouth and extending partially along the surrounding wall. The sleeve has an exterior and an interior. The exterior of the sleeve defines mounting threads constructed and arranged to removably mount with the filter head, when the filter arrangement is secured to the filter head. The interior of the sleeve is against the exterior of the surrounding wall. A first seal member is oriented against the sleeve to create a seal with a filter head, when the filter arrangement is secured to the filter head. A filter assembly includes a filter arrangement and a filter head. The filter arrangement is removably secured to the filter head by a threaded connection between the sleeve and the filter head. A system includes an engine utilizing a liquid and a filter assembly in fluid communication with the engine to filter the liquid. Methods of making filter arrangements include utilizing structures characterized above.

A filter frame, a filter cartridge, and an assembling method of the filter cartridge are provided. The method has the following steps. A filter core and a filter frame are prepared. The filter frame has a glue-cutting segment. Glue is coated around an outer wall of the filter core, and then the filter frame, which is mounted around the filter core, is pushed toward the glue to make the glue-cutting segment press the glue until the glue is cut into two parts. The inner glue part disposed between the filter core and the filter frame seals the filter cartridge. The outer glue part is disposed on an outer side of the filter frame, and is superfluous and removed. The glue-coating is combined with the mounting of the filter frame, thereby saving time and effort.

The present invention presents a filtration system with an integrated manifold valve. The filtration system employs only one pivotal componentthe pivoting of the manifold. The manifold valve includes a dual aperture design for a two-fold alignment scheme with the ingress and egress lines of the fluid source. The invention is free of multi-component rotary valve with internal, rotatable parts, or an activation component, such as a handle, for initiating the rotary valve, allowing the user to rotate the rotational components thereof. The reduction in moveable components in this design reduces the likelihood of failure and increases the reliability of the filtration system.

The present invention relates to the field of biological sample testing technology, and in particular, to a testing system. The testing system includes a reagent reaction vessel and a test device. A reagent storage portion and a push rod movable relative to the reagent storage portion are packaged in the reagent reaction vessel, the reagent storage portion comprises at least one reagent containing cavity, and the reagent containing cavity is sealed by a sealing element; and the push rod is connected to the sealing element, and the push rod is used for cooperation with the test device to separate the sealing element from the reagent storage portion. The test device includes a test cassette, wherein an ejection rod is arranged in the test cassette, and the ejection rod cooperates with the push rod to separate the sealing element from the reagent storage portion. According to the present invention, when the reagent storage portion is inserted, the ejection rod can be quickly pushed to operate, and one operation completes multiple functions such as releasing the reagent, fixing the reagent reaction vessel, and focusing on a test area at the same time, thereby simplifying the reaction steps.

A filter cartridge assembly is provided. The filter cartridge assembly includes a filter head having an inlet and an outlet, an inner moving up or down in the filter head by an elastic unit, and a locking/unlocking part to control the inner to be stopped in a state that the inner moves up and to move down in state that the inner is stopped such that a filter cartridge is detachably installed in the filter head through the up-down movement of the inner, wherein, in order to allow the inner, which moves up or down in the filter head, to linearly move up only to separate the filter cartridge and to prevent the filter cartridge from being arbitrarily separated when the inner moves down. The inner includes an inner main body, and a holder including a plurality of wing pieces, in which the holder formed on a lower end of the inner main body are provided with the wing pieces which are spaced apart from each other to operate inward and outward, respectively, when the inner moves up or down. Each of the wing pieces includes a protrusion for inducing the inner to be retracted inward while tightly making contact with an inner wall of the filter head when the inner moves up, and a holder protrusion formed at an opposite side of the protrusion to hold the filter cartridge. The protrusion of the wing piece releases an operation of the holder protrusion holding the filter cartridge in a state that the inner moves down, and the filter head is provided with an inner groove rim on a portion at which the protrusion is placed in the state that the inner moves down such that the protrusion is inserted into the inner groove rim to be latched to the inner groove rim, thereby preventing the inner from being arbitrarily separated from the filter head.

A filter cartridge assembly is provided. The filter cartridge assembly includes a filter head having an inlet and an outlet, an inner moving up or down in the filter head by an elastic unit, and a locking/unlocking part to control the inner to be stopped in a state that the inner moves up and to move down in state that the inner is stopped such that a filter cartridge is detachably installed in the filter head through the up-down movement of the inner, wherein, in order to allow the inner, which moves up or down in the filter head, to linearly move up only to separate the filter cartridge and to prevent the filter cartridge from being arbitrarily separated when the inner moves down. The inner includes an inner main body, and a holder including a plurality of wing pieces, in which the holder formed on a lower end of the inner main body are provided with the wing pieces which are spaced apart from each other to operate inward and outward, respectively, when the inner moves up or down. Each of the wing pieces includes a protrusion for inducing the inner to be retracted inward while tightly making contact with an inner wall of the filter head when the inner moves up, and a holder protrusion formed at an opposite side of the protrusion to hold the filter cartridge. The protrusion of the wing piece releases an operation of the holder protrusion holding the filter cartridge in a state that the inner moves down, and the filter head is provided with an inner groove rim on a portion at which the protrusion is placed in the state that the inner moves down such that the protrusion is inserted into the inner groove rim to be latched to the inner groove rim, thereby preventing the inner from being arbitrarily separated from the filter head.