Patent ID: 7309035
Filing Date: 2007-12-18
Classification: A01G

Abstract:
1. In an irrigation pipeline system having a generally horizontally extending main span and a generally horizontally extending swing span, an improved flow-through joint coupling the swing span with the main span for generally horizontal swinging movement of the swing span about a generally upright axis relative to the main span, said joint comprising: an upright tubular outlet port on the main span presenting said upright axis; a turret mounted on said main span for rotation about said upright axis with the swing span during said horizontal swinging movement of the swing span; and an upright tubular inlet port on the swing span aligned axially with said outlet port in fluid flow communication therewith, said swing span being attached to said turret in a manner to permit a limited amount of generally linear displacement of the swing span relative to the turret in a direction generally lengthwise of the swing span, said swing span being attached to said turret by a pair of coupling assemblies on opposite sides of said upright axis, at least one of said coupling assemblies including a first component fixed to the turret and a second component movable with the swing span relative to the first component during said displacement of the swing span.