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 inne
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.
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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 having an out
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 having an outer surface and an inner surface defining an inner 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; andan expansion ring configured to mate generally with the sealing element groove in a relaxed position and being reciprocable axially, whereinthe inner surface of the sealing element wall includes a portion that 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. 2. The sealing assembly of claim 1, comprising an axially reciprocable actuator rigidly attached at its distal end to the expansion ring for reciprocating the ring. 3. The sealing assembly of claim 2, comprising a guide member positioned at the proximal end of the drain insert for maintaining the actuator in a substantially axial position. 4. The sealing assembly of claim 3, wherein the guide member includes a plurality of fins extending outward from a substantially central bore configured for receipt of the actuator. 5. The sealing assembly of claim 4, wherein the tubular portion of the roof drain insert transitions from a bowl having an upper surface at the tubular portion proximal end and the fins extend axially beyond the bowl upper surface. 6. The sealing assembly of claim 3, wherein the guide member comprises an upper end and lower end with a substantially axial bore extending therebetween, the actuator extends through the bore with a proximal end having a threaded outer surface extending at least partially past the guide member upper end, comprising a nut member mated with the threading on the actuator proximal end. 7. The sealing assembly of claim 6, wherein axial reciprocation of the actuator and thereby expansion ring is directed by torqueing of the nut member. 8. The sealing assembly of claim 1, wherein the sealing element comprises a rigid ring defining an upper surface of the radial shoulder. 9. The sealing assembly of claim 1, comprising a rigid actuator mated at its distal end to the expansion ring for reciprocating the ring. 10. The sealing assembly of claim 9, wherein the actuator distal end has a threaded outer surface that is mateable within a threaded bore in the expansion ring. 11. The sealing assembly of claim 10, wherein axial reciprocation of the expansion ring is directed by rotation of the actuator and resulting cooperation of the actuator threaded surface and threaded bore. 12. A sealing assembly for fluidly sealing a roof drain insert having a tubular portion extending from a proximal end to a distal 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 defining an inner axial flow channel and an inner shoulder extending into the channel, the sealing element configured to slidingly engage at its proximal end with the tubular portion at the roof drain distal end with the tubular portion abutting the inner shoulder and a portion of the sealing element extending beyond the tubular portion, a portion of the channel beyond the tubular portion defining a portion that transitions inwardly into the flow channel;an expansion unit having a ring disposed within and substantially coaxial to the sealing element channel in a position beyond the roof drain distal end, and an actuator extending axially from the ring in the proximal direction; whereinmanipulation of the actuator causes axial reciprocation of the ring within the channel relative to the sealing element thereby expanding the sealing element outward to an expanded position abutting the conductor pipe as the ring travels along the inward transition of the flow channel when the sealing element is engaged with the drain tubular portion within a conductor pipe, and drainage fluid entering the tubular portion is allowed to flow through the portion of the flow channel extending beyond the tubular portion. 13. The sealing assembly of claim 12, wherein the shoulder extending into the axial channel is distal of the portion of the channel that transitions inwardly. 14. The sealing assembly of claim 13, wherein the axial channel transitions inward in the direction of distal-to-proximal. 15. The sealing assembly of claim 12, comprising a circumferential ridge in the channel shaped generally to receive and axially maintain the ring in a relaxed position. 16. The sealing assembly of claim 12, comprising a guide member for maintaining the actuator in a substantially axial position, the guide member positioned proximal to the ring. 17. The sealing assembly of claim 16, wherein the guide member comprises a plurality of fins extending radially outward from a central bore through which the actuator extends. 18. The sealing assembly of claim 12, wherein the channel defines a section of substantially uniform diameter intermediate the radial shoulder and portion that transitions inward. 19. 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 and an inner surface defining an inner 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 providing an upper surface for abutting the outlet end of the tubular portion, a radial groove intermediate the radial shoulder and lower end; andan expansion ring configured to mate generally with the sealing element groove in a relaxed position and being reciprocable axially, whereinthe 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. 20. The sealing assembly of claim 1, wherein the inner surface of the sealing element comprises a substantially cylindrical portion intermediate the radial shoulder and the portion that transitions inwardly. 21. The sealing assembly of claim 20, wherein the substantially cylindrical portion is coextensive with the radial shoulder. 22. The sealing assembly of claim 21, wherein the substantially cylindrical portion extends directly to the radial shoulder.
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