Ecolgical inovations and ecological house



Free counter and web stats
since October 03, 2005

Time and date

best view 1024x768 +


Copyright © 2005-2014
Veljko Milkovic
All rights reserved.

Copyright © VEMIRC 2009-2014
Veljko Milkovic
Research & Development Center
All rights reserved.


(Patent - YU 49002 B)




Picture 1. Public presentation of the hand water pump with a pendulum during the Agricultural Fair in Novi Sad (Serbia), 2003. The invention won a gold medal during the 2002 fair.
*watch the videos of pump - click here

New and technically original idea - hand water pump with a pendulum - 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. 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, which was proved by a large number of interested future consumers during the presentations.

Hand water pump with a pendulum is a realisation of a new, original, and even unbelievable, by very simple solution for pumping water. 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.

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).

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░.

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.

The invention is applicable on other devices that use lever mechanisms, such as a hand press etc.

Picture 2. Side view of the pump and the position of the piston, lever and the pendulum during operation of the pump.

It is possible to pump out a 1200 litres 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.


Whereas typical hand pumps require significant effort and an average person can use the pump continuously only for several minutes, the hand water 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.


Pendulum eases pumping of water


Hand water pump with a pendulum

- replicated by Miroslav Zupkov, August 2004, Novi Sad, Serbia -

*Note: The 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 litres per hour is calculated by pumping the bucket of 20 litres per minute
- 20 l/min x 60 minutes = 1200 litres/hour. - Miroslav Zupkov and Miroslav Rodic, August 2004

Laboratory pump with a pendulum

All details on the hand water pump with a pendulum and the information can be provided by the author, Veljko MilkoviŠ, who is willing for any form of cooperation with all potential strategic partners and customers for production and application. So far, there was a lot of interest for the application of the hand water pump with a pendulum both in domestic and foreign markets, as well as for further development of the product.


Preparation for the production of the Veljko Milkovic's hand water pump with a pendulum is currently being conducted in Novi Sad, Serbia by PC Panex Ltd. Novi Sad: e-mail: phone: +381 21 6410 157


A photo of the ultra efficent pendulum pump prototype made in Novi Sad in 2012 by PC Panex Ltd.
with financial support from the Serbian Ministry of Education, Science and Technological Development
and Provincial Secretariat for Economy, Employment and Gender Equality
of the Autonomous Province of Vojvodina, Republic of Serbia.

Hand Water Pump with a Pendulum: Technical Drawings - Dimensions and Weights (rough version)