Patent ID: 9347449
Filing Date: 2016-05-24
CPC Classification: F04D

Claim Text:
1. A submersible pump apparatus for use within a body of fluid, comprising: a motor and further defining a motor shaft extending outwardly from the motor; a motor cap slideably coupled to the motor shaft; means for fixedly securing the motor cap to the motor; a seal housing slideably coupled to the motor shaft; means for fixedly securing the seal housing to the motor cap; a double seal slideably coupled to the motor shaft and situated between the seal housing and the motor cap, the double seal creating a first mechanical seal between the seal housing and the motor shaft and a second mechanical seal between the motor cap and the motor shaft; and a single seal slideably coupled to the motor shaft and situated between the motor cap and motor, the single seal creating a third mechanical seal between the motor cap and the motor shaft; a first reservoir is formed between the seal housing and the motor cap; the first reservoir comprises open space that exists between the seal housing and the motor cap and adjacent the double seal between the first mechanical seal and the second mechanical seal; a second reservoir is provided inside the motor cap; the second reservoir comprises open space that exists inside the structure of the motor cap between the second mechanical seal and the third mechanical seal; a third reservoir is formed between the motor cap and the motor; the third reservoir comprises open space that exists between the motor cap and the motor and adjacent the single seal between the third mechanical seal and the motor, and wherein the first reservoir circumferentially surrounds the second reservoir and at least a part of the third reservoir.