Patent ID: 9133940
Filing Date: 2015-09-15
Classification: F16J

Abstract:
1. A unidirectional annular labyrinth seal component, comprising: a) one or more flexible annular fins positioned on a circular plate near an outer edge of said circular plate; b) said one or more flexible annular fins being biased towards a center of said circular plate; c) one or more flexible annular fins being constructed to project into recesses formed by one or more annular ribs on an end of a roller, thereby forming a unidirectional annular labyrinth seal; and d) said one or more flexible annular fins being constructed to engage said one or more annular ribs when the temperature of air within an interior of said roller is similar to the temperature of air exterior to said roller, thereby closing a labyrinth inside said labyrinth seal and preventing air exterior to said roller from entering said labyrinth seal and said interior of said roller.