Closing of hydraulic doors and recessed floor (Machine-translation by Google Translate, not legally binding)

摘要

Hydraulic and recessed floor closing of the floor, characterized in that it is integrated with a rotating square shaft and provided with two eccentric, so that when the door is opened, it turns this shaft, one of whose eccentric loads to the coil spring and the other, acting on a plunger, passes the oil from one cavity to another, that is, from back to front, through a valve that opens only in this direction. (Machine-translation by Google Translate, not legally binding)