| 摘要 |
FIELD: connection of plastic material pipes with pneumatic devices. SUBSTANCE: outer diameter of coupling member is made larger than inner diameter of pipe to provide increase of outer diameter of pipe fitted onto coupling member to diameter equal to nearest diameter of metric thread. Pipe is secured on coupling member by pressing device in form of union nut previously put onto pipe end. Nut two inner threaded sections with larger and smaller diameters and equal thread pitch, but length of larger diameter thread exceeds length of smaller diameter thread. EFFECT: reduced labour input in manufacture and service. 1 dwg
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