The conventional hand pumps available in market today works on two strokes, suction and delivery. while suction stroke is used for the suction of groundwater the delivery stroke in the hand pump is responsible for the discharge of water. this means that only one stroke i.e. delivery stroke is responsible for delivery of water to the consumer while the suction stroke consumes as much human energy but fails to utilize it for the delivery of water. also the conventional hand pump fails to deliver the volume of water that is available after the suction. about 35-40% of water is still available inside the cylinder of the hand pump after the delivery stroke thus decreasing its output. the study explains the effect of creating the free energy in the device made of a) oscillating pendulum lever system, b)system for initiating and maintaining the oscillation of the pendulum, c)system which uses the energy of the device by damping the oscillations of the lever. the operation of the machine is based on forced oscillation of the pendulum, since the axis of the pendulum affects one of these are ms of the two armed lever by a force which varies periodically. part of the total oscillation energy of the pendulum-lever system is changed into a work for operating a pump, a press, a rotor of an electric generation system. the creation of free energy was proved by a great number of physical models. the effect of creating the free energy is defined in this study as the difference between the energy which is the machine transfers to the user system by the lever and the energy which is input from the environment in order to maintain the oscillation of the pendulum. appearance of the free energy is not in accordance with the energy conservation law. the effect of creating the free energy results from the difference between the work of the orbital damping forces of the lever and the work of the radial damping force of the pendulum motion. this effect enables increase of the input energy. to get the water running out of the pump, the pendulum needs to be out of balance. after that, based on gravitational potential, the piston starts oscillating and the continuous stream of water is coming out of the output pipe. the pendulum should be occasionally pushed, to maintain the amplitude i.e. the stream of water. the pump works well with all sizes of the pendulum, but mainly with the amplitude of 90°.