The patents which cover the LJ Hydromotor claim a machine essentially composed of an enclosure in which the ascent and descent of a float produce a work which drives a pump or any other mechanical application.
Inspired by the "2-stroke engine", it is the float itself which controls, thanks to an appropriate "light", the entry of water into the enclosure. It will come out through a "butterfly door" which swivels around a horizontal axis located at mid-height.
The length of the float is imperceptibly less than the interior length of the enclosure and its height will be equal to the height of the door. By cons, its width will be significantly less than that of the enclosure so that the water can descend quickly.
As long as the enclosure is filled with water, the lower part of the door will experience a higher hydrostatic pressure than the upper part.
At the start and for a fraction of a second, the enclosure is filled with water, the float is at its bottom dead center and the door is blocked by the float.
Under Archimedes' thrust that it undergoes, the float will begin its ascent by gradually closing the "light" which had allowed water to enter the enclosure.
As soon as the bottom of the float arrives above the door, it will be unlocked, it will pivot, the water will escape and the float will come down, forcing it to close.
During its descent, the float will stop blocking the inlet "light" and water will reenter the enclosure.
Once the float returns to its bottom dead center, a new cycle will start instantly.
More:
http://www.hydromoteur.com/fonction.htm
http://www.hydromoteur.com/applications.htm
and a video http://www.hydromoteur.com/video.htm
Performance of the model "HM 120"
This machine occupies 1 m in length and 50 cm in width on the ground. Its height, without the pump, is also 1 m.
The float, 0,3 m high, releases a net thrust of 120 kg and its stroke is 0,3 m, or, at each cycle, a work of 360 Nm.
At the rate of 8 cycles / min, it will therefore produce:
8 cycles / min x 60 min x 24 hx 360 Nm,
or 4.147.200 Nm per day!
In other words it develops a gross power of: 8/60 * 360 = 48 W
Which can also be obtained in this way: P = V * F = 0.3 * 8/60 * 1200 = 48 W