Filter assembly and disposable filter element therefor

Claim 2

A filter assembly comprising: a filter head having an inner passage and an outer passage for the flow of fluid therethrough; a bowl detachably secured to said filter head; an impermeable shell disposed within and supported by said bowl, said shell having one end open and the other end closed; sealing means for engaging the open end to said bowl; a filter media disposed within said shell, said filter media forming an inner chamber and an outer chamber, respectively communicating with the inner passage and outer passage.

Claim 3

A filter assembly according to claim 1 wherein said shell is cylindrically shaped and said filter media is annularly shaped thereby forming an inner chamber, the outer chamber being formed between the outer periphery of the filter media and said shell.

Claim 4

A filter assembly according to claim 2 wherein said sealing means comprises a rim in the form of a circumferential ridge around the open end of said shell, said ridge being compressed between said filter head and said bowl so as to provide a seal.

Claim 5

A filter assembly according to claim 3 including means for sealing said filter media to said shell at the closed end thereof.

Claim 6

A filter assembly according to claim 3 including an end cap, said end cap having an outwardly extending neck communicating with the inner passage for the flow of fluid.

Claim 7

A filter assembly according to claim 3 including a volumetric member depending from said filter head, said member being provided with an annular portion disposed within said shell whereby fluid within said shell is displaced.

Claim 8

A filter assembly comprising: a valve body having a central opening and at least two conduits therethrough, respectively communicating with the central opening; a gate having an outer wall conforming to the central opening and a coaxial inner cylindrical wall, said inner wall and said outer wall forming concentrically arranged inner and outer passages; means mounting said gate within the central opening for providing communication between said inner passage and one conduit and between said outer passage and another conduit when said valve is in a filtering position; a bowl detachably secured to said valve body; an impermeable shell removably disposed within and supported by said bowl, said shell being cylindrically shaped and having one end open and tHe other end closed; and filter media coaxial with said shell forming an inner chamber and an outer chamber, respectively communicating with said inner passage and said outer passage.

Claim 9

A filter assembly comprising: a valve body having a central opening and at least two conduits therethrough, respectively communicating with the central opening; a gate having an outer wall conforming to the central opening and a coaxial inner cylindrical wall, said inner wall and said outer wall forming concentrically arranged inner and outer passages; means mounting said gate within the central opening for providing communication between said inner passage and one conduit and between said outer passage and another conduit when said valve is in a filtering position; a bowl detachably secured to said valve body; an impermeable shell removably disposed within and supported by said bowl, said shell being cylindrically shaped and having one end open and tHe other end closed; and filter media coaxial with said shell forming an inner chamber and an outer chamber, respectively communicating with said inner passage and said outer passage.

Claim 10

A filter assembly according to claim 7 including a seating member at the closed end of said shell comprising a retaining flange engaging the outer periphery of said filter media and a laterally extending skirt depending from the retaining flange, the skirt engaging said outer shell for positioning said filter media.

Claim 11

A filter assembly according to claim 7 comprising an end cap having a peripheral flange engaging the periphery of said filter media, a lip depending from said flange projecting into the outer chamber, and a neck adapted to engage said cylindrical wall for the flow of fluid between the inner chamber and the inner passage.

Claim 12

A filter assembly according to claim 7 comprising a rim in the form of a circumferential ridge around the open end of said shell, said ridge being compressed between said valve body and said bowl so as to provide a seal preventing the flow of fluid into said bowl.

Claim 13

A filter assembly according to claim 7 comprising a volumetric member depending from said valve body and provided with an annular portion thereof disposed within said shell whereby fluid within said shell is displaced.

Claim 14

A filter assembly comprising: a valve body having a central opening and at least two conduits therethrough, respectively communicating with the central opening; a gate having an outer wall conforming to the central opening and a coaxial inner cylindrical wall, said inner wall and said outer wall forming concentrically arranged inner and outer passages; means mounting said gate within the central opening for providing communication between said inner passage and one conduit and between said outer passage and another conduit when said valve is in a filtering position; a bowl detachably secured to said valve body; filter media disposed in the path of fluid flow, and an end cap adapted to slideably engage said cylindrical wall for the flow of fluid.

Claim 15

A filter assembly comprising: a valve body having a central opening and at least two conduits therethrough, respectively communicating with the central opening; a gate having an outer wall conforming to the central opening and a coaxial inner cylindrical wall, said inner wall and said outer wall forming concentrically arranged inner and outer passages; means mounting said gate within the central opening for providing communication between said inner passage and one conduit and between said outer passage and another conduit when said valve is in a filtering position; a bowl detachably secured to said valve body; filter media disposed in the path of fluid flow, and an end cap adapted to slideably engage said cylindrical wall for the flow of fluid.

Claim 16

A filter assembly according to claim 12 comprising a volumetric member depending from said valve body and provided with an annular portion thereof disposed within said shell whereby fluid within said shell is displaced.

Claim 17

A filter assembly according to claim 12 comprising an impermeable shell removably disposed within and supported by said bowl, said shell being cylindrically shaped and having one end open and the other closed; said filter media disposed within said shell.

Claim 18

A filter cartridge for a filter head having a depending cylindrical wall for the flow of fluid and a bowl detachably secured to the filter head, said filter cartridge comprising an impermeable shell adapted to be disposed within and supported by the bowl, said shell being cylindrical and having one end open and the other end closed, filter media coaxially disposed within said cylindrical shell thereby forming an inner chamber and an outer chamber, the outer chamber being formed between the outer periphery of the filter media and the inside wall of said shell, an end cap having a peripheral flange engaging the periphery of the filter media, said end cap including an outwardly extending neck communicating with the inner chamber and adapted to slidably engage said cylindrical wall, a rim in the form of a circumferential ridge, the ridge being formed around the open end of said shell and being adapted to be compressed between the filter head and the bowl so as to provide a seal.

Claim 19

A filter cartridge for a filter head having a depending cylindrical wall for the flow of fluid and a bowl detachably secured to the filter head, said filter cartridge comprising an impermeable shell adapted to be disposed within and supported by the bowl, said shell being cylindrical and having one end open and the other end closed, filter media coaxially disposed within said cylindrical shell thereby forming an inner chamber and an outer chamber, the outer chamber being formed between the outer periphery of the filter media and the inside wall of said shell, an end cap having a peripheral flange engaging the periphery of the filter media, said end cap including an outwardly extending neck communicating with the inner chamber and adapted to slidably engage said cylindrical wall, a rim in the form of a circumferential ridge, the ridge being formed around the open end of said shell and being adapted to be compressed between the filter head and the bowl so as to provide a seal.

Claim 20

A filter cartridge according to claim 15 including a seating member at the closed end of said shell comprising a retaining flange engaging the outer periphery of said filter media and a laterally extending skirt depending from the retaining flange, the skirt engaging said outer shell for positioning said filter media.

Claim 21

A filter cartridge according to claim 15 wherein said end cap includes a peripheral flange engaging the periphery of said filter media, a lip depending from said flange projecting into the outer chamber.