Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
114 words
An improved liquid filtration system, such system comprising, in combination: a. a vessel having a plurality of spaced interconnected walls defining a central cavity and having a liquid inlet spaced from a liquid outlet; b. a porous, self-supporting, rigid removable filter comprising a plurality of modules, each said module comprising a self-supporting filter body formed of a plurality of granules cemented together by set organic resin and disposed in a frame; c. connector means releasably securing said modules in said cavity adjacent said outlet so as to separate said outlet from said inlet; and, d. a mass of loose particles of filtering medium disposed above said rigid filter in said cavity and supported thereby.
Claim 2
Dependent Claim
114 words
An improved liquid filtration system, such system comprising, in combination: a. a vessel having a plurality of spaced interconnected walls defining a central cavity and having a liquid inlet spaced from a liquid outlet; b. a porous, self-supporting, rigid removable filter comprising a plurality of modules, each said module comprising a self-supporting filter body formed of a plurality of granules cemented together by set organic resin and disposed in a frame; c. connector means releasably securing said modules in said cavity adjacent said outlet so as to separate said outlet from said inlet; and, d. a mass of loose particles of filtering medium disposed above said rigid filter in said cavity and supported thereby.
Claim 3
Dependent Claim
34 words
The improved system of claim 1 wherein said inlet is above said outlet and wherein said filter body is spaced above said outlet to define a liquid redistribution space therebetween for improved back washing.
Claim 4
Dependent Claim
55 words
The improved system of claim 2 wherein said outlet is adjacent the lower end of said vessel and said inlet is adjacent the upper end of said vessel and wherein said filter and connector means extend substantially completely across said vessel to fully separate said inlet and outlet and to define said liquid distribution space.
Claim 5
Dependent Claim
29 words
The improved system of claim 3 wherein said connector means comprises a plate releasably secured to said modules and fixedly secured to the inner surfaces of said vessel walls.
Claim 6
Dependent Claim
51 words
The improved system of claim 4 wherein said filter body includes an upstream layer wherein said granules are of fine particulate form and wherein said body further includes a downstream layer wherein said granules are larger than the granules in said first layer, said first and second layers being sealed together.
Claim 7
Dependent Claim
28 words
The improved system of claim 5 wherein said frame includes a plurality of spaced cross members connected to and extending between said sidewalls and supporting said filter body.
Claim 8
Dependent Claim
19 words
The improved system of claim 6 wherein said cross members extend through and are bonded to said downstream layer.
Claim 9
Dependent Claim
48 words
The improved system of claim 7 wherein said mass of loose particles are sharp edged granite granules, wherein said upstream granules are crushed granite having an average diameter of about 0.02-0.04 inch and wherein said downstream granules are pea gravel having an average diameter of about 0.125-0.375 inch.
Claim 10
Dependent Claim
29 words
The improved system of claim 7 wherein said resin comprises epoxy resin present, together with resin hardener, in a weight ratio to said fine particulate granules of about 5-10:100.
Claim 11
Dependent Claim
20 words
The improved system of claim 7 wherein said frame is steeple shaped, has five cells and comprises fiberglass reinforced nylon.
Claim 12
Dependent Claim
41 words
The improved system of claim 10 wherein five of said modules are disposed in a circle with their steepled ends facing each other, to form said filter and wherein said cross members extend through about the midline of said downstream layer.