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US 7,195,122 B2Granted
Filters
AssigneePall Corporation
InventorsHajime Hiranaga, Tatsuya Hoshino
Life of this patent
Estimating the term…
Abstract
A filter comprising a filter cartridge and a housing having at least one fitting and defining a chamber, the filter cartridge being disposed in the chamber, wherein the housing includes a fluid conduit which extends axially from the fitting along the periphery of the filter cartridge, the fluid conduit being isolated from the filter cartridge chamber along a substantial portion of the length of the fluid conduit.
Claims32
A filter comprising:
- a filter cartridge including a hollow filter element and a blind end cap sealed to one end of the hollow filter element and
- a housing defining a chamber, said housing including a bowl defining a bottom of the housing and a head permanently attached to the bowl, wherein the head has a first fitting and a second fitting, the first and second fittings defining a fluid flow path through the housing, wherein the filter cartridge is permanently disposed in the chamber in the fluid flow path defining an annular channel between the bowl and the filter cartridge and wherein the housing includes a fluid conduit which extends axially in a sidewall of the bowl from the first fitting along the periphery of the filter cartridge chamber and opens into the annular channel at the bottom of the housing, the fluid conduit being isolated from the filter cartridge chamber along a substantial portion of the length of the fluid conduit, and
- wherein the filter cartridge has a bottom surface which is inclined upwardly toward the annular channel.
A filter comprising:
- a housing including a bowl, and a head attached to the bowl, an inlet, an outlet, and a vent, wherein the inlet and the outlet define a fluid flow path through the housing and the vent vents gas from the housing, and further including a filter cartridge chamber, and
- a filter cartridge disposed in the filter cartridge chamber in the fluid flow path, the filter cartridge including a hollow filter pack,
- wherein the inlet, the outlet and the vent are formed in the head, wherein the filter cartridge includes a pleated filter pack and a blind end cap disposed at a lower end of the filter pack, and wherein the filter cartridge and the housing are arranged to define a lower portion of the flow path near the blind end cap and a portion of the flow path between an interior side wall of the housing and an exterior of the filter cartridge, the filter further comprising an inlet conduit which extends axially in the interior sidewall of the bowl along a periphery of the filter cartridge chamber from the inlet to the lower portion of the flow path to direct fluid from the inlet to the lower portion of the flow path and through the portion of the flow path between the interior side wall of the housing and the exterior of the filter cartridge, and
- wherein a bottom of the filter of the cartridge has a surface which is inclined upwards toward to space between the interior side wall of the housing and the exterior of the filter cartridge.
1 more element
A filter comprising:
- a housing including a bowl which has a sidewall and a bottom, a head which is permanently attached to the bowl, and an inlet, an outlet, and a vent which are disposed in the head on top of the filter, wherein the inlet and the outlet define a fluid flow path through the housing and the vent vents gas from the housing, the housing further including a filter cartridge chamber, and
- a filter cartridge permanently disposed in the housing in the fluid flow path, wherein the filter cartridge includes a pleated filter pack having a hollow interior and a blind end cap disposed at a lower end of the filter pack, the filter cartridge being positioned in the filter cartridge chamber and defining a lower portion of the fluid flow path near the blind end cap and an annular portion of the fluid flow path along a periphery of the filter cartridge chamber between an interior side wall of the bowl and an exterior of the filter cartridge, wherein the inlet includes an inlet conduit which directs fluid along the side wall from the top of the filter to the lower portion of the fluid flow path and the annular portion of the fluid flow path, the filter cartridge having a bottom surface which is inclined upwards toward the annular portion of the fluid flow path, wherein the vent at the top of the filter vents gas from the annular portion of the fluid flow path, and wherein the outlet at the top of the filter fluidly communicates with the interior of the pleated filter pack.
A filter comprising:
- a housing including a bowl which has a sidewall and a bottom, a head which is permanently attached to the bowl to define a filter cartridge chamber, and an inlet, an outlet and a vent disposed in the head on top of the filter, wherein the inlet and the outlet define a fluid flow path through the housing, wherein the side wall forms an axially extending inlet conduit to direct fluid from the inlet toward the bottom of the filter cartridge chamber, and wherein the vent vents gas from the filter cartridge chamber, and
- a filter cartridge permanently disposed in the filter cartridge chamber in the fluid flow path and defining an annular portion of the fluid flow path between the sidewall of the bowl and the filter cartridge, the filter cartridge having an exterior, a hollow interior, and a bottom surface, wherein the bottom surface inclines upwardly toward the annular portion of the fluid flow path and wherein the inlet conduit fluidly communicates with the exterior of the filter cartridge and the outlet fluidly communicates with the hollow interior of the filter cartridge.
Dependencies are inferred from the claim text.