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US 4,838,763 AGranted
Canned motor pump
AssigneeHeyko Reinecker
InventorsRoland Kramer, Robert Neumaier
Life of this patent
Estimating the term…
Abstract
A canned motor pump wherein the can has at least two coaxial tubular walls defining an annular space for the flow of a preferably gaseous fluid which is used to facilitate detection of leaks in the walls of the can. Each tubular wall can individually seal the driving unit from the driven unit of the pump motor. The leak detector can generate visible, audible and/or otherwise detectable signals, and such signals can also serve to stop the motor in the event of leakage.
Claims45
A canned motor pump, comprising a hollow driving unit;
- a rotary driven unit which is at least partially surrounded by said driving unit;
- means for sealing fluids about said units from each other, comprising a can interposed between said units and including a plurality of walls which define a space;
- and means for monitoring said space for fluid leaks, said monitoring means including external sensing means responsive to leakage through said walls.
Dependencies are inferred from the claim text.