Patent ID: 7252141

Claim:
A groundwater sampling device for withdrawing groundwater from a well comprising: a hollow cylindrical tubular outer housing having a bottom and an open upper end thereof, said bottom having a water inlet port formed therethrough; a hollow cylindrical tubular inner housing having a bottom and an open upper end thereof, said inner housing sized to be positioned coaxially within said outer housing and defining a substantially cylindrical water flow passage therebetween, said bottom of said inner housing spaced from said bottom of said outer housing to define a lower portion of said water passage whereby said inlet port is in fluid communication with said water flow passage; an electric motor positioned within said inner housing, an output shaft of said motor downwardly extending through a sealed hole in said bottom of said inner housing; a water impeller connected to a lower end of said output shaft and operably positioned between said bottoms to cause water in the well to be drawn inwardly through said inlet port into and upwardly through said water flow passage; a motor module cap sealingly removably engaged at said open upper end of said inner housing, said motor module cap having aperture means for sealingly positioning electrical conduit passing longitudinally therethrough in contact with electrical input terminals of said motor; an output cap sealingly removably engaged at said open end of said outer housing, said output cap having aperture means for sealingly passing the electrical conduit longitudinally therethrough and also having a water outlet port for discharging water from the well upwardly therefrom, the water passing upwardly through said water flow passage providing cooling for said motor.