公开(公告)号：US3689239A

公开(公告)日：1972-09-05

申请号：US3689239D

申请日：1971-03-15

Applicant: AGA AB

Inventor： ERIKSSON ERIK TORVALD

IPC: A62C4/02 ,  F17C13/12 ,  A62C3/04

CPC classification number: A62C4/02 ,  F17C13/12 ,  F17C2205/0335 ,  F17C2205/0382 ,  Y10T137/7727

Abstract: A FLASH-BACK ARRESTOR COMPRISING A HOUSING WITH AN INLET AND AN OUTLET CHANNEL AND INCLUDING A FLAME ARRESTOR, A PRESSURE WAVE ARRESTOR AND A NON-RETURN VALVE. THE PRESSURE WAVE ARRESTOR CONSISTS OF A MOVABLE PISTON WITH A CENTRAL PASSAGEWAY. THE PISTON IS ARRESTABLE IN A CLOSED POSITION TO CLOSE THE INLET CHANNEL. THE CENTRAL PASSAGEWAY OF THE PISTON INCLUDES A VALVE SEAT FOR A NON-RETURN VALVE WHICH CLOSES FOR BACK FLOW. THE PISTON IS MOVABLY ARRANGED IN A CYLINDER MEMBER WITH A FLANGE INWARDLY DIRECTED TOWARDS THE PISTON PERIPHERY. A NUMBER OF SPRINGLOADED BALLS FORMING THE ARRESTING MEANS REST ON SAID FLANGE, AND THE SPRING-LOAD IS TRANSFERRED VIA ONE OR MORE WEDGE-SHAPED BODIES. SAID BODIES CAN MOVE UPWARDS AND DOWNWARDS IN THE CYLINDER MEMBER AND THEY ARE ARRANGED TO PRESS THE BALLS AGAINST THE PERIPHERY OF THE PISTON, SAID PERIPHERY BEING PROVIDED WITH A CONE-SHAPED SHOULDER BETWEEN ITS UPPER PART AND ITS LOWER PART IN ORDER TO KEEP THE PISTON IN POSITION BY MEANS OF THE BALLS WHEN THE PISTON IS IN THE OPENED POSITION.