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A liquid filter apparatus, for connection to inlet and outlet piping, includes a housing which is integral with the piping and a removable integral filter unit in the housing. The integral filter unit includes bottom and top end caps with a core tube and a concentric outer tube extending between the

A liquid filter apparatus, for connection to inlet and outlet piping, includes a housing which is integral with the piping and a removable integral filter unit in the housing. The integral filter unit includes bottom and top end caps with a core tube and a concentric outer tube extending between the end caps. A filter element between the core tube and the outer tube stands on ribs extending upward from the bottom end cap and is spaced from the top end cap by similar ribs extending downward from the top end cap, these ribs creating radial flow channels above and below the filter element. The filter element is a wound spiral of filter material and separator forming a plurality of axial flow channels. Some of these axial flow channels are open at the top to receive liquid from the top radial flow channel and closed at the bottom, and some of the axial channels are closed at the top and open at the bottom to discharge liquid into the bottom radial flow channel. Filter action is by way of radial flow, through the filter material, from the open-top channels to the open-bottom channels. The housing cover is removable to remove and replace the filter. Means are provided to vent air from the system and to drain liquid from the system for removal and replacement of the filter without having to clean the housing.

대표청구항 ▼

A liquid filter apparatus for connection to inlet and outlet piping, including a housing connected to said piping and an integral filter unit removably inserted into said housing, such housing permitting replacement of said integral filter unit without spillage of liquid; said housing including: a.

A liquid filter apparatus for connection to inlet and outlet piping, including a housing connected to said piping and an integral filter unit removably inserted into said housing, such housing permitting replacement of said integral filter unit without spillage of liquid; said housing including: a. a base plate having fixed inlet and outlet apertures communicating, respectively, with said inlet and outlet piping; b. a side wall extending from the peripheral region of said base plate; c. a cover plate mounted atop said side wall, said cover plate having a vent aperture therein and removably mounted relative to said base plate; said integral filter unit including: d. a bottom end cap having inlet and outlet apertures and adapted for sealing engagement with the respective inlet and outlet apertures of said base plate; e. a cylindrical core tube surrounding the inlet aperture of said bottom end cap and in sealing engagement with said bottom end cap and extending upwardly therefrom, said core tube effecting a continuation of said inlet piping; f. a concentric cylindrical outer tube extending upwardly from the periphery of said bottom end cap and in sealing engagement with, respectively, said inlet and outlet apertures in said plate; g. a top end cap mounted atop said outer tube, and in sealing engagement with said outer tube, said top end cap having a vent aperture in registry with the vent aperture in said cover plate; h. a filter element disposed between said core tube and said outer tube; i. said bottom and top end caps each including axially extending ribs to create, respectively, bottom and top radial flow channels below and above said filter element; and j. said filter element including a porous filter material defining a plurality of axial flow channels: some of said axial flow channels being open at their tops and open at their bottoms to discharge liquid into said bottom radial flow channel, whereby filter action is by way of radial flow from those axial flow channels with open tops to those axial flow channels with open bottoms; whereby said integral filter unit defines the complete liquid flow path through said apparatus from said inlet to said outlet apertures.