N Sakthimainthan (Hand operated water lifting pump)
Tamil Nadu
Sakthimainthan built his hand operated water pump in response to a dearth of available pumps that could be afforded by small farmers.
He built five prototypes over a period of fifteen years before finally perfecting his design.
The resulting water-lifting device is operated by the continuously rotating a handle. It is simple in design and has a high discharge at low cost compared to the motorized pumps and conventional hand pumps.
The pump has discharge of 20,000 lph at 0.75 m head. The unit has also been tested by TNAU, Coimbatore and improved by CMERI Durgapur. It is useful device for drainage as well.
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