SUPPLY LINE JOINT Russian patent published in 2004 - IPC

FIELD: supply line joints; mechanical engineering. SUBSTANCE: each pipe union is additionally provided with spring-loaded valve fitted with sealing member and seat. Additional spring-loaded valve located around main spring-loaded valve is connected with this valve through bush having straightway hole. Fitted on side of each pipe union is stop with straightway holes and sealing member. Each additional spring-loaded valve is mounted on pipe union for engagement of seat with sealing member of main spring- loaded valve which is provided with central projection passed through hole in additional spring-loaded valve extending above end of said valve. EFFECT: enhanced economical efficiency. 5 dwg