HYDRAULIC PNEUMATIC RAM Russian patent published in 2014 - IPC F04F7/02 

FIELD: machine building.

SUBSTANCE: invention relates to the field of technical hydraulics. A hydraulic pneumatic ram comprises a working chamber with impact and injection valves, a discharge cap, connected with a water receiver, a discharge air duct. The hydraulic pneumatic ram is equipped with an impact valve, a pneumatic chamber connected by a pneumatic line with an air distributor. The air distributor at one side is kinematically connected to a float hinged-lever drive arranged in a control reservoir, and at the other side - with a pneumatic line with the cavity of the discharge cap via a check valve, installed as capable of opening on the stroke of injection of spent air from the pneumatic chamber. The stem of the impact valve is made with an adjustment bushing and with a limiter, and the pneumatic chamber is made with a membrane working element with a stiff centre related to the stem.

EFFECT: invention increases accuracy of control of impact valve operation mode.

3 cl, 2 dwg