Abstract: This system is designed to eliminate the dead spot and enable the user to gain an increased stroke power, thus also increasing the speed of the bicycle. It is composed of a pair of crank arms of an obtuse configuration. Each crank presents an orifice, located at the middle part of the crank's vertex, that when connecting to the spindle allows them to integrate from left to right. These orifices function is to work as attachment and leaning point for the crank arms. Each crank arm opposite to the pedal receptor presents another orifice that will integrate through another element to the spindle, which will exercise the effect of traction, thus the function of the crank.

Abstract: A mobile multifunctional dental apparatus comprising: a generally rectangular shaped outer casing having a front wall, a rear wall, sidewalls, a floor, an interior compartment, a hinged lid, a plurality of wheels and an electrical coupling device, the front wall including a plurality of switches and a lighted screen, a plurality of hoses each having a first end positioned through the outer casing and a second end including a handle control, each handle control including a device to permit activation and deactivation thereof; and the interior compartment being divided into a plurality of levels by at least one divider wall, a first level including a motorized suction device, a second level being positioned beneath the first level with an aperture extending through a divider wall separating the levels, the motorized suction device causing inward suction, a collecting basin for retaining fluid being positioned within the second level, a limit switch including a stopper plug and a floatation device positioned wit