De-watering system
OwnerRichard L. Croyinventor
Life of this patent
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Abstract
A de-watering system of the type used to lower the water table by extracting water from below ground through the use of an elongated header conduit having a negative pressure placed thereon wherein a plurality of swing joints and well point assemblies are interconnected to the header conduit and jetted into the ground utilizing a forced stream of water to a predetermined depth. The well point assembly includes an outer strainer pipe disposed in surrounded, concentric relation to an inner down pipe wherein a plurality of slots are formed in the strainer pipe through which water passes into access with the distal open end of the down pipe. Water is drawn from the interior of the down pipe into the elongated header circuit to the point of ultimate disposition of the collected water.
Claims7
A de-watering system of the type used to extract water from a below ground surface water table, said system comprising:
- header means disposed above ground, a plurality of well point assemblies interconnected to said header means at spaced apart locations from one another along a length of said header means in fluid communication therewith;
- at least one of said well point assemblies comprising base means interconnected to said header means, strainer pipe means extending from said base means downwardly into the ground to the water table, down pipe means concentrically disposed on the interior of said strainer pipe means and extending downwardly therein along a major portion of the length of said strainer pipe means, intake means defined by an open distal end of the down pipe means, said intake means disposed in spaced relation above the distal end of said strainer pipe means, said strainer pipe means comprising inlet means extending along the lengeth thereof and including the predetermined dimension efficient to prevent entrance of soil particles to said intake means, said base means comprises a riser pipe disposed in interconnecting relation with both said said down pipe means and said strainer pipe means on one end thereof and said header means on the opposite end thereof, a coupling means disposed in connected relation at one end thereof to said riser pipe and at the other end thereof to both said strainer pipe means and said down pipe means, said strainer pipe means and said down pipe means beng concentrically disposed relative to one another, said coupling means comprises a slip coupling element comprising one end portion mounted on the interior of said riser pipe and the opposite end portion concurrently secured to the exterior of said down pipe means and the interior of said strainer pipe means and thereby establish fluid communication between said riser pipe and said down pipe means, whereby liquid is transferred under negative pressure from the water table to said header means, said coupling means further including an enlarged annular mid-portion formed between said end portions disposed to position the outer surface thereof in substantially flush relation to the outer surfaces of said riser pipe and said strainer pipe means.
Dependencies are inferred from the claim text.