US Patent 7640884 Firehose coupling exit indicator

A direction indicator device captured between couplers of ends of firehose sections that point to the source of the firehose and to safety. The direction indicator device includes a gasket-like annular body which fits over the male threads of the male coupler and is captured between annular ends of the abutting male and female coupler bodies. Direction pointing fingers, integral with the annular body, point toward the hose section to which the male coupler is attached and are angularly oriented to fit between longitudinal lugs of the male coupler. A lip is provided on an inwardly facing surface at each finger tip to hinder removal and to prevent inadvertent removal of the device from the male coupler body.