Water level control device

Claim 2

For use when and where necessary in association with irrigated land, a rice field for example which is marginally encompassed by a levee-type embankment: a device (1) for establishing and automatically controlling the level of the entrapped water or (2) optionally emptying the water for complete drainage into an adjacent area provided for that purpose comprising; a drainage conduit which is designed and adapted to bE embedded in the ground at the place desired, said conduit embodying a horizontal pipe line which is adapted to be embedded in a plane underneath the embankment and which has an outward outlet end communicable with said adjacent area, and inward upstanding vertically disposed means for receiving the overflow and delivering the same to the inlet end of said horizontal pipe line, said means embodying a union operatively joined to said inlet end, an adapter coupled to and rising from said union, and a sleeve whose lower end is telescopingly, adjustably and removably fitted into said adapter in a manner that the upper end controls the level of the water, said adapter being secured to a coacting upper end of said union, the upper end of said adapter being interiorly bevelled and provided with an annular limit stop shoulder, said bevel serving to guidingly pilot the lower end of the sleeve into the adapter for retentive seating on said limit stop shoulder.

Claim 3

The device defined in and according to claim 1, and wherein said adapter is cylindrical in cross-section and constitutes a coupling for said sleeve, said sleeve being likewise cylindrical in cross-section and of an outside diameter slightly less than the inside diameter of the adapter and the outer peripheral surface of said sleeve having longitudinally spaced parallel circumferential grooves, and a rubber packing and adjusting ring manually placeable in a selected groove, said ring being adapted to be seated on said limit stop shoulder in a manner to adjustably connect the sleeve to said adapter.

Claim 4

A water level and drainage control device for an irrigated land area comprising a sectional conduit which is L-shaped in side elevation and comprises a horizontal branch having an open outer water discharge and emptying end and an inner end provided with a complemental elbow providing a vertical upstanding union, said elbow having a reduced upstanding neck surrounded by an annular shoulder constituting a ledge, a cylindrical sleeve-like adapter constituting a vertical coupling, said adapter having an upper end which is interiorly bevelled and which is provided adjacent but below the level of said adapter with an annular limit stop shoulder, the lower end of said adapter snugly surrounding said neck and being seated on said ledge, said neck and a coacting interior surface of said adapter having like aligned and cooperating grooves, and a packing and sealing ring simultaneously lodged in both grooves and providing a water-tight joint between said union and said adapter.

Claim 5

A water level and drainage control device for an irrigated land area comprising a sectional conduit which is L-shaped in side elevation and comprises a horizontal branch having an open outer water discharge and emptying end and an inner end provided with a complemental elbow providing a vertical upstanding union, said elbow having a reduced upstanding neck surrounded by an annular shoulder constituting a ledge, a cylindrical sleeve-like adapter constituting a vertical coupling, said adapter having an upper end which is interiorly bevelled and which is provided adjacent but below the level of said adapter with an annular limit stop shoulder, the lower end of said adapter snugly surrounding said neck and being seated on said ledge, said neck and a coacting interior surface of said adapter having like aligned and cooperating grooves, and a packing and sealing ring simultaneously lodged in both grooves and providing a water-tight joint between said union and said adapter.

Claim 6

The water level and control device defined in and according to claim 3 and, in combination, an extensible and contractable water level determining and control sleeve, said sleeve being of an outside diameter slightly less than the inside diameter of said adapter, the upper end of said adapter being interiorly bevelled and the bevel merging into a coacting annular limit stop shoulder, said bevelled surface serving to guidingly pilot the lower end of said sleeve into the adapter in a manner to orient itself with and seat itself firmly and retentively on said limit stop shoulder.

Claim 7

The device defined in and according to claim 4, and wherein said adapter is cylindrical in cross-section and constitutes a coupling for said sleeve, said sleeve being likewise cylindrical in cross-section and of an outside diameter slightly less than the inside diameter of the adapter and the outer peripheral surface of said sleeve having longitudinally spaced parallel circumferential grooves, and a rubber packing and adjusting ring manually placeable in a selected groove, said ring being adapted to be seated on said limit stop shoulder in a manner to adjustably connect the sleeve to said adapter.

Claim 8

For use when and where necessary in association with irrigated land, a rice field for example which is marginally encompassed by a levee-type embankment: a device (1) for establishing and automatically controlling the level of the levee-entrapped irrigation water or (2) optionally emptying said water for complete drainage into an adjacent ditch provided for that purpose comprising a drainage conduit which is designed and adapted to be wholly embedded in the ground, said conduit embodying a horizontal drainage pipe line which is adapted to be embedded in a plane underneath the embankment and which has a constantly open outward outlet end communicable with said ditch, and rigid inward upstanding vertically disposed means for receiving the overflow of irrigation water and delivering the same by gravity to the inlet end of said horizontal pipe line, said means being rigidly operatively joined to said inlet end, and an upstanding overflow inlet sleeve having a constantly open upper end and a lower end telescopingly, adjustably and removably connected with said vertically disposed means in a manner that said upper end of said sleeve controls the level of the irrigation water, said upstanding vertically disposed means embodying a vertical branch constituting a coupling and having an upper terminal end which is interiorly bevelled, said sleeve constituting an extensible and retractable water level determining and control member and being readily attachable to and detachable from the upper end of said vertical branch, and an elastic sleeve supporting joint sealing ring surrounding and adjustably mounted on an exterior peripheral surface of said sleeve, the upper end of said vertical branch providing a limit stop shoulder and said ring being of a size that it is seatable atop said limit stop shoulder.

Claim 9

For use when and where necessary in association with irrigated land, a rice field for example which is marginally encompassed by a levee-type embankment: a device (1) for establishing and automatically controlling the level of the levee-entrapped irrigation water or (2) optionally emptying said water for complete drainage into an adjacent ditch provided for that purpose comprising a drainage conduit which is designed and adapted to be wholly embedded in the ground, said conduit embodying a horizontal drainage pipe line which is adapted to be embedded in a plane underneath the embankment and which has a constantly open outward outlet end communicable with said ditch, and rigid inward upstanding vertically disposed means for receiving the overflow of irrigation water and delivering the same by gravity to the inlet end of said horizontal pipe line, said means being rigidly operatively joined to said inlet end, and an upstanding overflow inlet sleeve having a constantly open upper end and a lower end telescopingly, adjustably and removably connected with said vertically disposed means in a manner that said upper end of said sleeve controls the level of the irrigation water, said upstanding vertically disposed means embodying a vertical branch constituting a coupling and having an upper terminal end which is interiorly bevelled, said sleeve constituting an extensible and retractable water level determining and control member and being readily attachable to and detachable from the upper end of said vertical branch, and an elastic sleeve supporting joint sealing ring surrounding and adjustably mounted on an exterior peripheral surface of said sleeve, the upper end of said vertical branch providing a limit stop shoulder and said ring being of a size that it is seatable atop said limit stop shoulder.