A movable seal for interfacing between a first surface and a second surface includes a floating portion attached to a non-floating portion by a flexible coupling portion, wherein the non-floating portion is coupled to the first surface by nesting in a groove on the first surface, and wherein the non-floating portion forms a seal between the first and second surfaces when the first surface moves relative to the second surface in a first direction, and wherein the non-floating portion does not form a seal between the first and second surfaces when the first surface moves relative to the second surface in a second opposite direction.

Systems, devices and methods are configured to prepare a specimen. A system may include a preparation device configured to mate with a specimen collection device. The preparation device may include an agitator member and a filter member. The filter member and the agitator member may be configured to move independently with respect to each other and the preparation platform member. The filter member may be configured to move linearly with respect to the preparation platform member and/or the agitator member, and the agitator member may be configured to move linearly and radially with respect to the preparation platform member and/or the agitator member. The system may also include a specimen collection device. The specimen may include but is not limited to fecal matter.

A pool cleaning assembly includes a frame is that may be manipulated thereby facilitating the frame to be urged through a pool. A float is coupled to the top lateral member. The float floats in the pool thereby facilitating the frame to be oriented upright in the pool. A pair of wheels is provided. Each of the wheels is rotatably coupled to the frame to roll along a bottom of the pool. A plurality of brushes is provided and each of the brushes is removably coupled to the frame. Each of the brushes is frictionally engages the bottom of the pool when the frame is urged through the pool. Thus, each of the brushes cleans the bottom of the pool. A screen is removably coupled to the frame. The screen capture debris when the frame is urged in the pool thereby facilitating the debris to be removed from the pool.

A portable drinking water filter system, such as a pitcher, having a sleeve and a floatable body including a filter opening configured to receive a water filter, the floatable body having a seal extending outward from an outer surface of the floatable body. The floatable body is disposed in a sleeve cavity such that a body seal engages the sidewall and restricts water from passing between the floatable body and the sidewall. The seal is configured to create friction with the sidewall, wherein the friction created when the floatable body rises in the sleeve is different than when the floatable body lowers in the sleeve. The friction created when the floatable body rises in the sleeve is greater than when the floatable body lowers in the sleeve, allowing the floatable body to auto-retract toward a cavity base without burping.

A device and method for filtering a liquid, wherein the device (100) comprises a container (110), a filter unit (120) and a filtering medium (130). The container (110) holds the liquid (10) containing a solid substance (10a), and the filter unit (120) is slidable in the container (110). The filtering medium (130) is non-permeable to the solid substance (10a) in the liquid (10).

A device and method for filtering a liquid, wherein the device (100) comprises a container (110), a filter unit (120) and a filtering medium (130). The container (110) holds the liquid (10) containing a solid substance (10a), and the filter unit (120) is slidable in the container (110). The filtering medium (130) is non-permeable to the solid substance (10a) in the liquid (10).

An apparatus for separating cells from microcarriers comprises a chamber having a body and a base. The chamber is configured to receive a mixture comprising cells and microcarriers. The apparatus further comprises a filtration element disposed within the chamber and coupled to the body. The filtration element is configured to filter microcarriers from the mixture. The apparatus further comprises an adjustment mechanism coupled to the chamber. The adjustment mechanism is configured for selective extension and retraction of at least a portion of the body of the chamber to move the filtration element relative to the base of the chamber.

An apparatus for separating cells from microcarriers comprises a chamber having a body and a base. The chamber is configured to receive a mixture comprising cells and microcarriers. The apparatus further comprises a filtration element disposed within the chamber and coupled to the body. The filtration element is configured to filter microcarriers from the mixture. The apparatus further comprises an adjustment mechanism coupled to the chamber. The adjustment mechanism is configured for selective extension and retraction of at least a portion of the body of the chamber to move the filtration element relative to the base of the chamber.

A kit is provided that includes an extraction tube or a transport tube; a filter, a liquid for bathing the filter within the tube; and a filter shaft. The filter shaft includes a distal portion that is coupled to a central portion of the filter. The filter shaft is configured to insert the filter into the tube for bathing the filter in the liquid. Other embodiments are also described.

A pool cleaning assembly includes a frame is that may be manipulated thereby facilitating the frame to be urged through a pool. A float is coupled to the top lateral member. The float floats in the pool thereby facilitating the frame to be oriented upright in the pool. A pair of wheels is provided. Each of the wheels is rotatably coupled to the frame to roll along a bottom of the pool. A plurality of brushes is provided and each of the brushes is removably coupled to the frame. Each of the brushes is frictionally engages the bottom of the pool when the frame is urged through the pool. Thus, each of the brushes cleans the bottom of the pool. A screen is removably coupled to the frame. The screen capture debris when the frame is urged in the pool thereby facilitating the debris to be removed from the pool.