Patent ID: 8564390

Claim:
A float operated liquid level switch comprising: a body; a float assembly pivotally attached to the body at a pivot axis, the float assembly comprising: a first end; a second end opposite the first end, where the pivot axis is located on a line directly between the first end and the second end; a float attached to the first end; a float magnet attached to the second end, such that raising the float causes the float magnet to lower and lowering the float causes the float magnet to rise; a switch magnet responsive to movement of the float magnet; an arm extending from said switch magnet wherein said arm and said switch magnet pivot about a pivot shaft, and wherein movement of said switch magnet translates into rotational movement of said arm; a tapered needle plug receivable in a bleed port in a valve seat assembly responsive to movement of the arm; and a pneumatic block and bleed valve assembly controlled by movement of the tapered needle plug.