Aeration diffuser assembly end seal
An aeration assembly includes an end fitting having a top piece for attachment to a diffuser member. A gasket extends beneath the top piece. The aeration assembly may include a diffuser member with the end fitting. In one embodiment, the diffuser member has a hollow conduit section and a flange section. The flange section includes a series of openings extending along a length of the diffuser member. The openings extend through the flange section to an interior space in the conduit section.
1. An aeration assembly comprising:
a diffuser member comprising a conduit section and a flange section, the conduit section surrounding an interior space;
a membrane extending over the flange section, the membrane and flange section forming a gas chamber therebetween, the gas chamber in fluid communication with the interior space of the conduit section, and
an end fitting comprising a top piece arranged to apply a clamping force to the top surface of the membrane, a securing strap arranged to apply a clamping force to an edge portion of the membrane, and a tensioning mechanism arranged to provide a clamping force between the top piece and the flange section in a direction transverse to the flange section.
2. The aeration assembly of claim 1 comprising a wing support attached to a first surface on the conduit section and a contacting a second surface on the flange section.
3. The aeration assembly of claim 2 , wherein the tensioning mechanism is constituted by at least one fastener anchored into the wing support.
4. The aeration assembly of claim 3 , wherein the securing strap has an end forming a fastener hole, the fastener hole receiving the at least one fastener.
5. The aeration assembly of claim 1 , wherein the flange section comprises a pair of wings extending symmetrically and outwardly from the conduit section.
6. The aeration assembly of claim 5 , wherein each of the wings comprises a free end forming a longitudinal groove that extends along the length of the free end.
7. The aeration assembly of claim 6 comprising a flexible cord in each of the longitudinal grooves, each flexible cord inserted over an edge portion of the membrane to secure said edge portion in the groove.
8. The aeration assembly of claim 1 , wherein the top piece comprises an inner surface that engages the diffuser member and an outer surface opposite the inner surface.
9. The aeration assembly of claim 8 wherein the securing strap extends over the outer surface of the top piece.
10. The aeration assembly of claim 9 , wherein the securing strap comprises a pair of securing straps.
11. The aeration assembly of claim 10 , wherein the top piece has an arc-shaped top surface.
12. An aeration assembly comprising:
a diffuser member comprising a conduit section and a flange section, the conduit section surrounding an interior space;
a membrane extending over the flange section, the membrane and flange section forming a gas chamber therebetween, the gas chamber in fluid communication with the interior space of the conduit section, and
an end fitting comprising a top piece arranged to apply a clamping force to the top surface of the membrane, a wing support arranged on a side of the flange section opposite the membrane, a strap arranged to apply a clamping force to an edge portion of the membrane, and a tensioning mechanism arranged to provide a clamping force between the top piece and the wing support in a direction transverse to the flange section.
13. The aeration assembly of claim 12 , wherein the tensioning mechanism is constituted by at least one fastener anchored into the wing support.
14. The aeration assembly of claim 13 , wherein the securing strap has an end forming a fastener hole, the fastener hole receiving the at least one fastener.
15. The aeration assembly of claim 14 , wherein the flange section comprises a pair of wings extending symmetrically and outwardly from the conduit section.
16. The aeration assembly of claim 15 , wherein each of the wings comprises a free end forming a longitudinal groove that extends along the length of the free end, the aeration assembly comprising a flexible cord in each of the longitudinal grooves, each flexible cord inserted over an edge portion of the membrane to secure said edge portion in the groove.
17. The aeration assembly of claim 16 , wherein the top piece has an arc-shaped top surface.
18. An aeration assembly comprising:
a diffuser member comprising a conduit section and a flange section, the conduit section surrounding an interior space;
a membrane extending over the flange section, the membrane having a pair of edge portions, the membrane and flange section forming a gas chamber therebetween, the gas chamber in fluid communication with the interior space of the conduit section, and
an end fitting comprising a top piece arranged to apply a clamping force to a top surface of the membrane, a strap arranged to apply a clamping force to the edge portions of the membrane, a gasket arranged to abut the top surface and the edge portions of the membrane, and a tensioning mechanism to provide a clamping force between the top piece and the flange section in a direction transverse to the flange section.
19. The aeration assembly of claim 18 , comprising a wing support attached to a first surface on the conduit section and contacting a second surface on the flange section.
20. The aeration assembly of claim 19 , wherein the tensioning mechanism is constituted by at least one fastener anchored into the wing support.
21. The aeration assembly of claim 18 comprising a compliant layer between the membrane and the flange section to absorb unevenness along the flange section.