Motor driven fuel pump

A motor driven fuel pump comprising:

• a cylindrical motor housing;
• a motor armature rotatably disposed in said motor housing;
• a pump housing secured to an end of said motor housing and defining a pump chamber having a radially positioned outer peripheral section;
• a regenerative pump type impeller disposed in said pump chamber and rotatably journalled within said pump housing and drivingly connected to said motor armature, said impeller having an outer peripheral section cooperating with a radially outer peripheral section of the inner surface of said pump chamber to define a fuel passage extending circumferentially about said impeller;
• a suction port formed in said pump housing and having an axis substantially parallel to the axis of said motor armature and communicated with said fuel passage adjacent one end thereof;
• a discharge port formed in said pump housing and communicated with said fuel passage at the other end thereof and extending therefrom substantially tangentially thereto;
• means defining an aperture extending through said pump housing for communicating said fuel passage with the inside of said motor housing, said aperture means including means defining an inlet opening portion at least a part of which includes a surface angled with respect to the rotation of said impeller and to the direction of fuel flow so that a dynamic pressure component of the fuel pressure in said fuel passage is applied to said inlet means so that the dynamic pressure component forces a substantial amount of fuel through said aperture means;
• and
• a discharge pipe connected to the downstream end of said discharge port and having an axis substantially parallel to the axis of said motor armature.