Sealing device for an immersible pump

Apparatus for an immersible pump comprising:

• a sealing device defining an inner circumferential wall having a geometry complementary to an outer circumferential wall of a shaft, the sealing device including:
• first sealing means for forming a seal with a tapering region of the shaft communicable with a motor;
• and
• second sealing means (a) for engaging and forming a seal with a first end of a sleeve having a bore extending through both ends and configured to have the shaft extend through said both ends and (b) for, in response to a force directed at least in part from the first end of the sleeve through engagement with the first end of the sleeve, enhancing the seal of said first sealing means;
• wherein the second sealing means comprises an annular ring having a radially-extending shoulder that forms an abutment configured to receive the force from the first end of the sleeve;
• and
• wherein forcing the sealing device over the shaft causes the second sealing means to engage the first end of the sleeve, applies the force to the second sealing means, drives the first sealing means toward the tapering region of the shaft, and forces the first sealing means to engage the tapering region of the shaft.

Apparatus for an immersible pump comprising:

• a sealing device, including:
• first sealing means for forming a seal with a tapering region of a shaft communicable with a motor;
• and
• second sealing means (a) for forming a seal with a sleeve having a bore extending through both ends configured to have the shaft extend through said both ends and (b) for, in response to a force directed at least in part from the sleeve, enhancing the seal of said first sealing means;
• wherein the tapering region of the shaft is at a first angle relative to a central longitudinal axis;
• wherein the first sealing means comprises a sloped surface at a second angle relative to the central longitudinal axis, the second angle of the sloped surface of the first sealing means being noncongruent with the first angle of the tapering region of the shaft;
• and
• wherein the first angle of the tapering region of the shaft relative to the central longitudinal axis is greater than the second angle of the sloped surface of the first sealing means relative to the central longitudinal axis, the greater first angle of the tapering region of the shaft increasing an outward deflection of the first sealing means when mated with the tapering region of the shaft.