A 3-wheeled contrivance, propelled by means of many small shakes.
The shakes are provided by old ladies, who have contracted them through a lifetime of the over indulgence in vigorous sexual activity.
The device has a hinge at the front and two handles at the back, into which the shakes are fed.
The shakes are then passed through an pulpatator, transforming it into patential energy.
Behold, one patmobile approacheth !
*20mins later* Behold ! The same patmobile approacheth.
*35mins later* One patmobile has moved on. . . .