Fuel pump for motor vehicle

In a motor vehicle fuel pump including

• a tubular shell
• an electric motor in said Shell having an armature shaft rotatable about a centerline of said shell,
• a first pump means in said shell at an inlet end thereof having a first rotatable element therein, and
• a second pump means in said shell having a second rotatable element therein between said first rotatable element and said electric motor,
• the combination comprising:
• means defining a driver chamber between said first and said second rotatable elements,
• a barrel-shaped driver in said driver chamber having a first edge facing said first rotatable element and a second edge facing said second rotatable element,
• means defining a plurality of drive sockets in said first rotatable element each having a side extending generally radially relative to said centerline of said shell,
• means defining a plurality of first drive lugs on said first circular edge of said driver extending into corresponding ones of said drive sockets in said first rotatable element,
• means defining a plurality of drive sockets in said second rotatable element each having a side extending generally radially relative to said centerline of said shell,
• means defining a plurality of second drive lugs on said second circular edge of said driver extending into corresponding ones of said drive sockets in said second rotatable element,
• means on each of said first plurality of drive lugs and on said second plurality of drive lugs defining a drive edge parallel to said centerline of said shell and engageable on said side of the corresponding one of said drive sockets when said driver rotates in a first direction about said centerline of said shell, and
• means connecting said driver to said armature shaft for rotation as a unit therewith in said first direction about said centerline of said shell.