Sediment trap

Claim 2

A sediment trap and cleaning apparatus thereof, comprising: a tank assembly, a water supply, filter means in said tank, an inlet to admit water to said tank and through said filter means, a water outlet to release the water after flowing through said filter means, means to close the inlet and outlet, means when said inlet and outlet are closed to wash the filter means and siphon off said water used to wash the filter means, said means to wash the filter being mounted on said tank and extending therein, including an inlet pipe to carry water into the interior of said tank and an outlet pipe associated therewith to siphon the water out, said inlet pipe being fixed on the inside surface of said outlet pipe, said pipes being thereby coextensive, means mounting said outlet pipe through a wall of said tank opposing the upstream side of said filter means for rotary oscillation of the coextensive pipes and insertion or withdrawal thereof in relation to said tank wall.

Claim 3

The device of claim 1 wherein the filter means is a series of layers of different size aggregate in the bottom of the tank.

Claim 4

The device of claim 2 wherein the layers of aggregate begin with the coarsest layer on the bottom of the tank and ascend upward to the finest layer at the top of the filter means.

Claim 5

The device of claim 3 wherein the outlet is in the coarsest layer of the filter and the inlet is above the surface of the finest layer of the filter.

Claim 6

The device of claim 1 wherein the means to close the inlet comprises a shut off valve.

Claim 7

The device of claim 5 wherein the means to close the outlet comprises a shut off valve.

Claim 8

In combination, a filter tank including a fluid inlet and a fluid outlet, fluid filtering media disposed in the path of movement of fluid through said tank from said inlet to said outlet, an outlet pipe for removing from said tank solid particles separated by said media, support means mounting said outlet pipe through a wall portion of said tank constructed and arranged to permit angular displacement of said pipe relative to said tank wall portion, the inlet end of said pipe disposed within said tank, upon angular displacement of said pipe, being movable into close proximity with and swingable over at least a large portion of the upstream side of said filter media, and wash water means for said filtering media including an outlet end adjacent and supported for movement with the inlet end of said outlet pipe and operable to discharge a stream of water therefrom onto those portions of the upstream side of said filter media with which the inlet end of said outlet pipe is moved into close proximity .

Claim 9

In combination, a filter tank including a fluid inlet and a fluid outlet, fluid filtering media disposed in the path of movement of fluid through said tank from said inlet to said outlet, an outlet pipe for removing from said tank solid particles separated by said media, support means mounting said outlet pipe through a wall portion of said tank constructed and arranged to permit angular displacement of said pipe relative to said tank wall portion, the inlet end of said pipe disposed within said tank, upon angular displacement of said pipe, being movable into close proximity with and swingable over at least a large portion of the upstream side of said filter media, and wash water means for said filtering media including an outlet end adjacent and supported for movement with the inlet end of said outlet pipe and operable to discharge a stream of water therefrom onto those portions of the upstream side of said filter media with which the inlet end of said outlet pipe is moved into close proximity .

Claim 10

The combination of claim 7 wherein said support means includes means mounting said outlet pipe for longitudinal shifting relative to said tank wall.

Claim 11

The combination of claim 7 wherein said wash water means includes a supplemental water inlet pipe extending through said outlet pipe and including an outlet end spaced slightly outward of the inlet end of said outlet pipe.

Claim 12

The combination of claim 7 wherein said support means includes means establishing a fluid tight seal between the external surface of said outlet pipe and said tank wall.