Filter with an open-cell elastomeric foam

Claim 2

A filter for water, said filter comprising: a. a cylindrical body having, coaxially, an inner hollow surface and an outer peripheral surface; b. a pair of opposed end plates sealing the ends of said body; and c. an axial fitting that substantially is spaced from the hollow surface and that connects said end plates; d. said body being composed of an elastomeric foam characterized by open cells which range from 10 to 400 pores per linear inch; e. said cylindrical body being composed of spiral convolutions including two outer convolutions of a sheet of said elastomeric foam; f. at least said two outer convolutions being bonded to each other by a line of cement extending substantially from one end of said body to the other; g. said end plates being bonded to the ends of said body by cement; h. said elastomeric foam being composed of a material that is selected from the class consisting of urethane polymers and vinyl polymers and has a 25 percent indication load deflection value in the range of 1 to 200 pounds-force per 50 square inches.

Claim 3

A filtration process comprising flocculating a water supply to be cleansed by dispersing a coagulant therein and flowing the flocculated water supply into a filter comprising: a. a cylindrical body having, coaxially, an inner hollow surface and an outer peripheral surface; b. a pair of opposed end plates sealing the ends of said body; and c. an axial fitting that substantially is spaced from the hollow surface and that connects said end plates; d. said body being composed of an elastomeric foam characterized by open cells which range from 10 to 400 pores per linear inch; e. said cylindrical body being composed of spiral convolutions including two outer convolutions of a sheet of said elastomeric foam; f. at least said two outer convolutions being bonded to each other by a line of cement extending substantially from one end of said body to the other; g. said end plates being bonded to the ends of said body by cement; h. said elastomeric foam being composed of a material that is selected from the class consisting of urethane polymers and vinyl polymers and has a 25 percent indication load deflection value in the range of 1 to 200 pounds-force per 50 square inches.

Claim 4

A filtration process comprising flocculating a water supply to be cleansed by dispersing a coagulant therein and flowing the flocculated water supply into a filter comprising: a. a cylindrical body having, coaxially, an inner hollow surface and an outer peripheral surface; b. a pair of opposed end plates sealing the ends of said body; and c. an axial fitting that substantially is spaced from the hollow surface and that connects said end plates; d. said body being composed of an elastomeric foam characterized by open cells which range from 10 to 400 pores per linear inch; e. said cylindrical body being composed of spiral convolutions including two outer convolutions of a sheet of said elastomeric foam; f. at least said two outer convolutions being bonded to each other by a line of cement extending substantially from one end of said body to the other; g. said end plates being bonded to the ends of said body by cement; h. said elastomeric foam being composed of a material that is selected from the class consisting of urethane polymers and vinyl polymers and has a 25 percent indication load deflection value in the range of 1 to 200 pounds-force per 50 square inches.