Fluid pump assembly

A fluid transfer pump assembly comprising:

• a motor enclosure assembly formed by a motor enclosure and an end bell;
• wherein the motor enclosure and the end bell join together to form a motor cavity sized to receive a motor;
• wherein the motor enclosure includes a collar that extends from the motor enclosure at a collar base, encircles a portion of the motor cavity, and terminates at a collar end distal from the collar base;
• wherein the collar includes a collar surface;
• wherein the end bell includes a flange that extends from the end bell at a flange base, encircles a portion of the motor cavity, and terminates at a flange end distal from the flange base;
• wherein the flange includes a flange surface;
• wherein when the motor enclosure and the end bell are joined together to form the motor cavity, the collar surface faces the flange surface to form a flame path between the collar and flange surfaces;
• wherein when the motor enclosure and the end bell are joined together to form the motor cavity the collar base is located adjacent the flange end to form an interior-only joint that faces the motor cavity but not located exterior of the motor enclosure assembly;
• wherein when the motor enclosure and the end bell are joined together to form the motor cavity the flange base is located adjacent the collar end to form an exterior-only joint that is located exterior of the motor cavity and does not face the motor cavity;
• wherein the flame path extends from the interior-only joint to the exterior-only joint;
• a heat sink composed of a panel positionable at the interior-only joint of the motor enclosure assembly;
• wherein the panel of the heat sink has a first surface, a perimeter surface, and a second surface such that the second surface is located adjacent the perimeter surface and opposite the first surface;
• and
• a heat generating circuit board that is attachable to the panel of the heat sink at a location selected from the group consisting of the first surface and the second surface;
• wherein a portion of the first surface of the panel of the heat sink abuts the collar base at the interior-only joint;
• wherein a portion of the second surface of the panel of the heat sink abuts the flange end at the interior-only joint;
• and
• wherein the perimeter surface of the panel of the heat sink does not interfere with the flame path extending from the interior-only joint to the exterior-only joint of the motor enclosure assembly.