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Title: Split driveshaft pump for hazardous fluids

A pump having a split driveshaft for use in pumping hazardous fluids wherein only one driveshaft becomes contaminated by the fluid while the second remains isolated from the fluid. The pump has a first portion and a second portion. The first portion contains a pump motor, the first driveshaft, a support pedestal, and vapor barriers and seals. The second portion contains a second, self-lubricating driveshaft and an impeller. The first and second driveshafts are connected together by a releasable coupling. A shield and a slinger deployed below the coupling prevent fluid from the second portion from reaching the first portion. In operation, only the second assembly comes into contact with the fluid being pumped, so the risk of contamination of the first portion by the hazardous fluid is reduced. The first assembly can be removed for repairs or routine maintenance by decoupling the first and second driveshafts and disconnecting the motor from the casing.
 [1];  [2];  [3]
  1. (Aiken, SC)
  2. (Evans, GA)
  3. (Orchard Park, NY)
Issue Date:
OSTI Identifier:
United States of America as represented by United States (Washington, DC) SRS
Patent Number(s):
US 5380162
Contract Number:
Research Org:
Country of Publication:
United States
split; driveshaft; pump; hazardous; fluids; pumping; contaminated; fluid; remains; isolated; portion; contains; motor; support; pedestal; vapor; barriers; seals; self-lubricating; impeller; driveshafts; connected; releasable; coupling; shield; slinger; deployed; below; prevent; reaching; operation; assembly; contact; pumped; risk; contamination; reduced; removed; repairs; routine; maintenance; decoupling; disconnecting; casing; pump motor; prevent fluid; hazardous fluid; split driveshaft; hazardous fluids; /417/