Method and device for controlling a flow of fluid

A method for controlling liquid flow, comprising the steps of:

• providing a well having a well inlet and a well outlet disposed in opposite ends of said well;
• positioning an inlet tube within said well, said inlet tube having a first end extending through said well inlet and having a second end disposed in aligned but spaced apart relation to said well outlet;
• providing a pivotal joint in said inlet tube so that said inlet tube has a first part having a first proselected length and a second part having a second preselected length, said first and second Darts of said inlet tube being jointed to one another, said first part being immovably mounted and said second part being free to pivot with respect to said first part;
• positioning a floating body within said well in overlying relation to said second part of said inlet tube;
• attaching said floating body to said second part of said inlet tube so that said second part of said inlet tube pivots with respect to said first part of said inlet tube as a water level rises and falls within said well;
• mounting an imperforate slide within said well in upwardly spaced relation to said well outlet;
• preselecting said first and second preselected lengths of said first and second parts so that a distal free end of said second part of said inlet tube is disposed below said imperforate slide;
• whereby as a water level rises within said well said floating body and hence said second part of said inlet tube pivot about said pivot point so that said distal free end of aid second part of said inlet tube rises, thereby bringing said distal free end of said second part of said inlet tube into closing relation with said imperforate slide, thereby restricting flow of water through said inlet tube;
• and
• whereby as said water level falls within said well, said floating body and hence said second part of said inlet tube pivot about said pivot point so that said distal free end of said second part of said inlet tube falls, thereby taking said distal free end of said second part of said inlet tube out of closing relation with said imperforate slide, thereby increasing flow of water through said inlet tube.

A method for controlling liquid flow, comprising the steps of:

• providing a well having a well inlet and a well outlet disposed in opposite ends of said well;
• positioning an inlet tube within said well, said inlet tube having a first end extending through said well inlet and having a second end extending through said well outlet;
• providing a cut out top part of said inlet tube along a substantial part of its extent so that said cut out too part has a leading end near a leading end of said inlet tube and so that said cut out top part has a trailing end near a trailing end of said inlet tube;
• providing a pivot point in said inlet tube at a preselected position along the extent thereof, said pivot point dividing said inlet tube into a first part having a first length and a second part having a second length;
• positioning a floating body having a first preselected length, within said well in overlying relation to said second part of said inlet tube;
• pivotally connecting a trailing end of said floating body to said pivot point so that said floating body pivots about said pivot point as a water level rises and falls within said well;
• positioning an elongate arm, having a second preselected length, within said well in overlying relation to said first part of said inlet tube;
• connecting a leading end of said elongate arm to said pivot point at a predetermined angle relative to said floating body so that said elongate arm pivots about said pivot point as said water level rises and falls within said well;
• attaching an imperforate slide to a distal free end of said elongate arm;
• selecting said first and second lengths of said floating body and said elongate arm so that said imperforate slide is disposed above said leading end of said cut out part of said inlet tube;
• whereby as water rises within said well, said floating body pivots about said pivot point, thereby causing said elongate arm to pivot about said pivot point, thereby lowering said imperforate slide into closing relation to said inlet tube at the leading end of said cut out part of said inlet tube and raising said imperforate slide out of closing relation to said inlet tube when the water level is falling within said well.