AUTOMATIC AIR BLEEDER FOR HYDRAULICAL CONNECTION Russian patent published in 2011 - IPC F16T1/45 F16K24/04 

FIELD: machine building.

SUBSTANCE: device consists of case 1 with inlet orifice 2 and float chamber 3 and of cover 4 of case with outlet orifice shut off with two-step multi-purpose valve 17. Plungers and piston of two-step multipurpose valve 17 are interconnected limited-movably and simultaneously are connected with float 9 and cover 4 of case 1 by means of link rod 26, articulated rod 31 and pivoted lever 13. Pneumatic drive 18 of multipurpose valve 17 consists of a case of the pneumatic drive, of a cylinder and a piston. The piston is connected with link rod 26, and is spring loaded relative to it and relative to case 18 of the pneumatic drive. A control valve for connection and disconnection of an above-piston cavity of the pneumatic drive with float chamber 3 is installed in cover 4 of the air bleeder case. A plunger of the control valve is connected with float 9 and cover 4 of case 1 by means of pivoted lever 13 and an additional articulated rod. A sub-piston cavity of the pneumatic drive is continuously communicated with atmosphere. Effective area of the pneumatic drive piston exceeds effective area of the plunger of the first step of two-step multipurpose valve 17. The control valve is made double-seat and caged. Directing surface 10 for the float is made in case 1 of the air bleeder.

EFFECT: raised efficiency of withdrawal of accumulations of gas-air medium from hydraulic connections for facilitation of trouble-free operation of hydraulic equipment.

6 cl, 6 dwg