SEAM SEALING SYRINGE AND HOLDER PREVENTING LEAKAGE AFTER DELIVERY Russian patent published in 1999 - IPC

FIELD: mechanical engineering. SUBSTANCE: holder has tubular body, front pressure hole in front part of tubular body and rear wall installed for displacement inside tubular body. Seam sealing syringe has pan for placing holder and piston installed for displacement parallel to pan. Control lever is used to move rear wall inside tubular body forward to decrease volume of chamber in holder. Rear wall is free to slide inside tubular body owing to reduced diameter of rear wall relative to inner diameter of tubular body. Wall starts moving/backwards when volume of body decreases in radial direction after operation. As an alternative, holder body can be protected from expansion and can be positively clamped . EFFECT: prevention of leakage of sealing compound caused by reduction of body volume. 10 cl, 9 dwg