such water and debris to flow upwardly through turbine 68 and outlet port 72 into a collection bag 74 which acts as a filter the venturi action is caused by the accelerated flow of water created by jets 66 a and 66 b the accelerated flow of water creates a pressure differential which causes an upward suction of water and debris from adjacent on the pool surface into inlet 70 thus the venturi jets serve two purposes u2014 driving the turbine and creating an upward flow from beneath the pool cleaner for cleaning purposes the size and orientation of venturi jets 66 a and 66 b not only cause these actions but serve to facilitate an essentially quick straight line movement of debris into collection bag 74 in every other respect pressure cleaner 63 is like suction cleaner 20 referring again to pool cleaner 20 of fig1 9 the following is a description of the manner in which the rotation of rotor 48 is transmitted to drive wheels 22 a d fig6 is particularly helpful in illustrating the drive train and its three different portions the three different portions include 1 a first portion which extends from a first drive gear 76 affixed to rotor 48 to left and right front wheels 22 a and 22 b 2 a second portion which extends from front wheel 22 a to rear wheel 22 c and 3 a third portion which extends from front wheel 22 b to rear wheel 22 d the second and third portions of.