IMPROVED INDICATOR OF PIPELINE SCRAPER WITH CONTROLLED ADJUSTMENT Russian patent published in 2012 - IPC F16L55/48 

FIELD: machine building.

SUBSTANCE: indicator comprises the following components: a nipple having an inner surface with thread and an outer surface, a plug unit, having threads, arranged on the outer surface, a groove arranged on the outer diametre, and a start-up device, besides, the specified plug is arranged as capable of threaded engagement with the inner surface to the nipple thread, an indicator unit, comprising a flag that may move between the first position and the second position and displaced in direction to the second position, an engagement mechanism capable of holding a flag in the first position and joined with the start-up device and the indicator unit, capable of installation on the plug and the nipple in multiple versions of alignment relative to the plug and the nipple.

EFFECT: invention provides for variation of alignment or direction of a flag without unscrewing or screwing of a plug unit.

10 cl, 11 dwg