Device for delayed and/or slowed return of gas cylinders

摘要

A device for the delayed and/or slowed return of gas cylinders, of the type that comprises a hollow cylindrical body (11) in which a piston (12) can slide, the actuation stem (13) of the piston protruding from the body (11) and being adapted to interact so as to contrast the actuation of mechanical elements; the piston (12) defines and separates inside the body (11) two variable-volume chambers (16, 17), a first one on the side provided with the stem and a second one on the opposite side; the device comprises a reservoir (21) of hydraulic fluid that is kept at a preset pressure and is connected to a delivery duct (31) and a return duct (32) to the first chamber (16) of at least one gas cylinder (10), whose second chamber (17) is filled with gas; the return duct (32) is controlled by a valve (38) for delaying and/or slowing the flow.