Deep Well Irrigation Pump
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United States of America Patent
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N/A
Issued Date -
Oct 23, 2008
app pub date -
Nov 15, 2004
filing date -
Nov 14, 2003
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
Provided herein are exemplary embodiments of an efficient pump apparatus. In one embodiment the pump apparatus comprises a piston assembly loosely disposed within a cylinder. The piston assembly includes a driving cable connecting a top leaky piston and a bottom leaky piston having a check valve connected thereto. The cylinder includes an outlet pipe at an upper portion thereof and a check valve located at a lower end of the cylinder. The pistons move in the cylinder at a velocity relative to the conduit such that as the pistons move along the cylinder they create a substantial tortuous leak path forming a hydrodynamic seal between the pistons and the cylinder.
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