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US 12,128,334 B2Granted
Filter press with threadably advanced filtrate receiving plunger
OwnerKin Mun Chininventor
Life of this patent
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Abstract
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).
Claims4
A filter press for separating a mixture of liquid (10) and solid particles (10a), comprising:
- a cylindrical container (110) having an open upper portion (110e) and a closed lower portion (110d), an interior diameter of the open upper portion (110e) being greater than the interior diameter of the closed lower portion (110d), the open upper portion (110e) having a female threaded portion (110a) formed on an inner side surface (110b) of the open upper portion (110e);
- and
- a cylindrical filter unit (120) having:
- an elongate cylindrical wall defining a filtrate volume, the elongate cylindrical wall having an outer side surface (120b) with an outer diameter equal to the interior diameter of the closed lower portion (110d) such that the outer side surface (120b) of a bottom end of the cylindrical filter unit (120) frictionally and axially slides along the inner side surface (110b) of the closed lower portion (110d) within the cylindrical container (110) and forms a fluid-tight seal with the inner side surface (110b) of the cylindrical container (110) when the cylindrical filter unit (120) is urged into the closed lower portion (110d) of the cylindrical container (110), a male threaded portion (120a) sized and positioned to threadably engage the female threaded portion (110a) is formed on the outer side surface (120b) of the elongate cylindrical wall;
- and
- a filtering medium (130) located at the bottom end of the cylindrical filter unit (120);
- wherein, the cylindrical filter unit (120) is slidably inserted into the cylindrical container (110) until the male threaded portion (120a) engages the female threaded portion (110a), then a rotational force is applied to the cylindrical filter unit (120) causing the cylindrical filter unit (120) to threadably and translationally advance into the cylindrical container (110), pressurizing the liquid (10) and forcing the liquid to pass through the filtering medium (130) and enter the filtrate volume of the cylindrical filter unit (120), while constricting the solid particles (10a) between the cylindrical filter unit (120) and an endwall of the closed lower portion (110d) of the cylindrical container (110).
4 more elements
Dependencies are inferred from the claim text.