Filter apparatus

Claim 2

Fluid-filtering apparatus, comprising an assembly including: A. an elongated tubular housing having an inlet end and an outlet end with an inlet and an outlet respectively; B. a filter unit mounted in said housing adjacent the outlet end, said filter unit comprising a. a hollow tubular sleeve having longitudinally extending fluid channels in at least one side, said channels discharging at the downstream end of the tubular sleeve, b. filtering fabric secured over the channeled side of the tubular sleeve; C. a body of diatomaceous earth and a separate body of activated carbon within said housing and retaIner D. means for retaining said body of diatomaceous earth and body of activated carbon in the housing upstream of the filtering unit, said retainer means having openings therein for the flow of fluid therethrough; E. the tubular sleeve being corrugated on the outer side and on the inner side, said corrugations providing exterior and interior longitudinally extending fluid channels connected with the outlet; the filtering fabric being on the exterior of the tubular sleeve and on the interior thereof and secured to the interior and exterior of said tubular sleeve.

Claim 3

The invention defined by claim 1, wherein the filtering fabric comprises canton flannel napped on the outer side, said fabric being secured to the tubular sleeve by screening material.

Claim 4

The invention defined by claim 1, wherein the respective channels on the interior and exterior of the sleeve are annularly offset relative to each other.

Claim 5

The invention defined by claim 1, wherein the filtering fabric is secured to the corrugated sleeve by screening, and wherein there is at least one layer of screening between the fabric and the adjacent sides of said tubular sleeve to thereby hold the fabric from entering the channels.

Claim 6

Fluid filtering apparatus, comprising an assembly including: A. an elongated tubular housing having an inlet end and an outlet end with an inlet and an outlet, respectively; B. a filter unit mounted in said housing adjacent the outlet end, said filter unit comprising a. a hollow tubular sleeve having longitudinally extending fluid channels in at least one side, said channels discharging at the downstream end of the tubular sleeve, b. filtering fabric secured over the channeled side of the tubular sleeve; C. a body of diatomaceous earth and a separate body of activated carbon within said housing and retainer D. means for retaining said body of diatomaceous earth and said body of activated carbon in the housing upstream of the filtering unit, said retainer means having openings therein for the flow of fluid therethrough; E. A normally closed inlet valve and a normally closed outlet valve, said valves each having a valve stem, a support for the filter assembly, said support having an inlet and an outlet, an inlet and an outlet tapered fitting positioned for reception in the inlet and outlet, respectively, of the tubular housing, said tapered fittings extending into the inlet and outlet, respectively, and engaging said valve stems for moving the valves in the opening direction when the filter assembly is moved onto said fittings; F. and means for securing said filter assembly on said support.

Claim 7

Fluid filtering apparatus, comprising an assembly including: A. an elongated tubular housing having an inlet end and an outlet end with an inlet and an outlet, respectively; B. a filter unit mounted in said housing adjacent the outlet end, said filter unit comprising a. a hollow tubular sleeve having longitudinally extending fluid channels in at least one side, said channels discharging at the downstream end of the tubular sleeve, b. filtering fabric secured over the channeled side of the tubular sleeve; C. a body of diatomaceous earth and a separate body of activated carbon within said housing and retainer D. means for retaining said body of diatomaceous earth and said body of activated carbon in the housing upstream of the filtering unit, said retainer means having openings therein for the flow of fluid therethrough; E. A normally closed inlet valve and a normally closed outlet valve, said valves each having a valve stem, a support for the filter assembly, said support having an inlet and an outlet, an inlet and an outlet tapered fitting positioned for reception in the inlet and outlet, respectively, of the tubular housing, said tapered fittings extending into the inlet and outlet, respectively, and engaging said valve stems for moving the valves in the opening direction when the filter assembly is moved onto said fittings; F. and means for securing said filter assembly on said support.

Claim 8

The invention defined by claim 5, including a gasket secured respectively at the inlet and outlet, said gaskets having central openings therein through which the tapered fittings extend, said gaskets sealingly engage the tapered fittings.

Claim 9

The invention defined by claim 6, including washers having central openings therethrough in alignment with the openings in the gaskets, the openings in the washers being of approximately the diameter of an intermediate part of the fittings for engagement with such intermediate parts so as to be supported beneath the respective gaskets.

Claim 10

The invention defined by claim 5, wherein the tapered fittings have fluid passage means at their free ends, said free ends being the parts of said fittings which engage the valve stems for moving the valves to the open position when the filter assembly is attached to said tapered fittings.