Drain Seal

摘要

A sealing assembly for fluidly sealing a roof drain within a conductor pipe has a sealing element and an expansion ring. The sealing element defines an inner wall with a portion that transitions inward and may be disposed on a portion of the roof drain. The expansion ring is disposed within the inner wall. Reciprocation of the of the expansion ring along the inward transitioning portion of the inner wall causes the sealing element to expand outwardly to a sealed position with the sealing element outer wall abutting the conductor pipe inner wall in a fluid tight seal. Opposite reciprocation of the ring allows the sealing element to contract and release from the conductor pipe.

主权项

1. A sealing assembly for fluidly sealing a roof drain insert having a tubular portion and an outlet end within a generally cylindrical conductor pipe having an inner diameter that is greater than the drain insert tubular portion outer diameter, comprising
a sealing element with a wall defining an outer surface, inner surface and a passage extending axially from an upper end to a lower end, a radial shoulder extending into the passage intermediate the upper end and lower end, a radial groove intermediate the radial shoulder and lower end; and an expansion ring configured to mate generally with the sealing element groove in a relaxed position and being reciprocable axially, wherein the inner surface of the sealing element wall transitions inwardly from the radial groove toward the radial shoulder such that reciprocation of the expansion ring axially from the groove toward the shoulder causes outward expansion of the wall to a sealed position against the conductor pipe.