Hand Water Pump with a Pendulum

Continuous Pumping of Water with a Little Finger

Enormous Efficiency Concerning the Input of Energy

Up To a 1200 Litres of Water Per Hour without a Major Effort

Hand water pump with a pendulum is a very simple solution for pumping water. It provides alleviation of work, because it is enough to move the pendulum occasionally with a little finger to pump the water, instead of large swings. Work is alleviated because easier, long-lasting and effortless use of the hand water pump has been enabled.

Input energy for starting the process of pumping, in form of occasional pushing of the pendulum, is much less than with typical hand pumps. Whereas typical hand pumps require significant effort and an average person can use the pump continuously only for several minutes, the pendulum pump needs the minimum of the effort, because it is only necessary to swing the pendulum and maintain the oscillation for several hours, without any fatigue.

The advantage of this invention compared to present hand pump solutions are: less force to start the pump, less water consumption, both arms can be used to fetch the water.

It is possible to pump out a 1200 liters of water per hour, without any fatigue and continue with the pumping. Both arms are free for fetching water, and both elderly and children can use it, since maintaining the oscillation of the pendulum does not request any special training or dexterity.

Using the minimum of human strength in comparison to present classic hand water pumps enables efficient application in irrigation of smaller lots, for water-wells and extinguishing fires even by old people and children.

Veljko Milkovic's innovation "Hand water pump with a pendulum" was proclaimed national winner of the world's most prestigious environmental award “Energy Globe Award 2011“ for the Republic of Serbia.

Principle of Work

Pendulum Pump #2: The working principle of the hand water pump with a pendulum

The working principle of the water pump with a pendulum: oscillation of the physical pendulum (1) is maintained with a minimum engaging hand. A variation of inertial forces causes the oscillation of two-arm lever (2), which is associated with a piston pump (3), and there is a spring (4).

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°.

Hand water pump with a pendulum for pumping water out from wells or reservoirs consists of a cylinder (1) with a piston (2), lever system (3), a seesaw (4), a pendulum (5), a reservoir (6) and output water pipe (7).

Pendulum Pump #3: Side view of the pump and the position of the piston, lever and the pendulum during operation of the pump

Side view of the pump and the position of the piston, lever
and the pendulum during operation of the pump

Video: Hand water pump with a pendulum

Model of the hand water pump with a pendulum constructed by Miroslav Zupkov operating on a farm not far from Novi Sad (Serbia), August 2004.
Technical data: the water pipe is placed at the depth of 12 meters, but because of hydrostatic pressure, water level is at the depth of 3 to 5 meters (depending on underground waters, atmospheric rainfalls etc.). Capacity of 1200 liters per hour is calculated by pumping the bucket of 20 litres per minute -- 20 l/min x 60 minutes = 1200 litres/hour by Miroslav Zupkov and Miroslav Rodic.

Video: Pendulum eases pumping of water

Photos

Pendulum Pump #1: Public presentation of the hand water pump with a pendulum during the Agricultural Fair 2003 in Novi Sad (Serbia). The invention won a gold medal during the 2002 fair.	Pendulum Pump #4: Public presentation of the hand water pump with a pendulum during the Agricultural Fair 2003 in Novi Sad (Serbia). The invention won a gold medal during the 2002 fair.
Pendulum Pump #5: Public presentation of the hand water pump with a pendulum during the Agricultural Fair 2003 in Novi Sad (Serbia). The invention won a gold medal during the 2002 fair.	Pendulum Pump #6: Hand water pump with a pendulum operating on a farm not far from Novi Sad (Serbia), August 2004
Pendulum Pump #7: Laboratory model of the hand water pump with a pendulum	Pendulum Pump #8: New design of the hand water pump with a pendulum, 2010