US 11,866,251 B2
Seal for cover on wastewater treatment tank
Artak Daviti Mirzoyan, Eagle Mountain, UT (US); Haydon Christiansen, Sandy, UT (US); and Eric Hunter, North Salt Lake, UT (US)
Assigned to Ovivo Inc., Montreal (CA)
Filed by Ovivo Inc., Montreal (CA)
Filed on Apr. 29, 2022, as Appl. No. 17/733,597.
Claims priority of provisional application 63/185,236, filed on May 6, 2021.
Prior Publication US 2022/0356007 A1, Nov. 10, 2022
Int. Cl. B65D 90/54 (2006.01); E04H 7/06 (2006.01); B65D 90/08 (2006.01)
CPC B65D 90/54 (2013.01) [B65D 90/08 (2013.01); E04H 7/065 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A rim seal connected between a cover and a concrete tank in a sewage treatment facility, comprising:
a concrete tank rim at periphery of the tank, and a tank cover over an interior of the tank, the tank cover being supported on the tank rim,
a series of radial beams converging and extending angularly upwardly toward a top center of the tank cover, and supporting the tank cover, the radial beams having lower, outer ends terminating near the tank rim,
a structural thrust ring around the periphery of the concrete tank, positioned adjacent to the tank rim and connected to the tank rim, the thrust ring being connected to the outer ends of the radial beams and being positioned to withstand outward forces from the radial beams, and
a flexible membrane mechanically connected in sealed relationship to both the tank cover and the tank rim, thus providing a gas seal between the tank cover and the tank rim while allowing for thermal expansion and contraction.