Method for manufacturing a ready-to-use catch pit
AssigneesWaco-Liesbosch Beton B.V., Ubo Engineering B.V.
InventorJohan Van Den Tol
Life of this patent
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Abstract
A method for making a catch-pit, such as the catch-pits often associated with underground pipeline junctions, manholes, or the like, where it is desirable to join a horizontal pipe with a larger-diameter, vertical, hollow, cylindrical works by means of a cottering or sleeve joint. The method includes the use of a removable profile component at the time the wall element of the pit or manhole is manufactured, to create a specially contoured opening in the wall to receive a correspondingly-shaped sleeve joint, which in turn receives the pipe.
Claims3
A method of manufacturing a ready-for-use catch pit having a substantially cylindrical shape, the catch pit comprising a sump and a wall element placed on the sump, the method comprising the steps of:
- during manufacture of the catch pit, when the wall element is poured, incorporating a removable profile component in the wall element thereby following its curvature;
- providing the wall element with an annular cottering or sleeve joint adapted to receive a sewage drain pipe, and having an end defining an arcuate profile corresponding to said curvature of said wall element;
- and
- after the wall element is set, removing the profile component, thereby producing an orifice in the wall element for receiving the cottering or sleeve joint,
- wherein the profile component comprises a protrusion extending into the catch pit's interior so as to cause that after the profile component's removal, the orifice narrows in steps toward the interior, defining a sideways extending rim, and wherein said end of said cottering or sleeve joint defining an arcuate profile is placed onto the sideways extending rim of the orifice.
A catch pit comprising a sump, a substantially cylindrical wall element placed on the sump, and suitable to receive thereon a cone provided with a manhole, wherein the wall element is provided with a recess which narrows in steps toward the interior, defining a sideways extending rim, and wherein a cottering or sleeve joint having an end defining a profile corresponding to the curvature of said wall element is placed onto the sideways extending rim of the recess.
Dependencies are inferred from the claim text.