Transformable tricycle and variations

An operator powered wheeled vehicle, comprising:

• a frame including a front portion having an upwardly extending support with a sleeve at the upper end, and a rear portion;
• a shaft pivotally received in the sleeve, the shaft having an upper end attached to steering handle bars, and a lower end attached to a front fork;
• a bracket attached to and extending up from the front fork;
• a rotatable pedal crank attached to the bracket;
• a front wheel rotatably attached to the front fork, and being driveably connected to the pedal crank by a continuous drive chain;
• a pair of foldable bracket arms, each bracket arm having a distal end and a proximal end pivotally attached about a vertical axis to the rear portion of the frame, the bracket arm being movable between an operating position where the bracket arms are disposed perpendicular to the frame, and a storage position where the bracket arms fold forward toward the front portion of the frame;
• a pair of rear wheels, each wheel being pivotally attached about a horizontal axis to the distal end of the bracket arms;
• a pair of seat brackets each seat bracket being operably attached to and disposed to extend forward of the distal end of the bracket arms;
• a seat having two sections, each of the seat sections being pivotally attached to the other and also pivotally attached to one of the pair of seat brackets, the seat sections being movable between a horizontal operating position, and an upwardly folded storage position;
• and
• a locking mechanism disposed to secure the seat sections in the horizontal operating position.