Patent ID: 6869531

Claim:
A fluid filter for separating a less dense fluid from a high dense fluid while said less dense fluid floats on said high dense fluid, comprising: at least a fluid filtering arrangement comprising a floating wing adapted for floating on said less dense fluid, and having at least a fluid outlet formed on said floating wing; a container body, which is extended from said floating wing, having a fluid collecting cavity communicating with said fluid outlet, wherein said fluid outlet is formed at a peak of said fluid collecting cavity, wherein said container body comprises an outer surrounding wall and an inner surrounding wall, having an inner receiving cavity, integrally extended from said outer surrounding wall at a bottom edge thereof to form said fluid collecting cavity therebetween, wherein said floating wing is extended from an upper end portion of said inner surrounding wall such that said fluid collecting cavity is communicated with said inner receiving cavity through said fluid outlet for allowing said less dense fluid within said inner receiving cavity flowing into sad fluid collecting cavity through said fluid outlet, wherein said inner surrounding wall is formed as a hollow conical shape such that said inner receiving cavity has a cross sectional area gradually reducing towards a peak thereof, wherein said fluid outlet is formed at said peak of said inner surrounding wall, wherein said outer surrounding wall has a height higher than a height of said inner surrounding wall in such a manner that when said fluid outlet is moved slightly below said surface level of said less dense fluid for allowing said less dense fluid flowing through said fluid outlet, a top edge of said outer surrounding wall is positioned above said surface level of said less dense fluid, so that said outer surrounding is capable of retaining said less dense fluid within said fluid collecting cavity; and a substance guide mounted underneath said container body at a bottom opening of said inner receiving cavity, wherein said substance guide has a plurality of guiding meshes sized for allowing said high and low dense fluids flowing into said inner receiving cavity and blocking substances floating on said high and low dense fluids entering into said inner receiving cavity, wherein said substance guide further comprises a plurality of prongs extended downwardly for pressing said substances floating on said high and low dense fluids so as to block said substances sticking on said guiding meshes; thereby, when a downward force is applied on said floating wing until said fluid outlet is slightly positioned below a surface level of said less dense fluid, said less dense fluid is allowed to flow into said fluid collecting cavity through said fluid outlet by gravity.