Patent ID: 7363944
Filing Date: 2008-04-29
Classification: A61P,F24D

Abstract:
1. A diaphragm tank, comprising: an outer shell; a flexible diaphragm; a liner sealingly connected to the flexible diaphragm to define a bladder, the liner including an orifice and a raised portion surrounding the orifice defining a relief surface and having a first side surface bounding the orifice and a second side surface opposing the first side surface, wherein the relief surface extends the entire length of the raised portion; a passage fitting having an inner wall and a concentric, outer wall, with the passage fitting providing fluidic communication through the inner wall between an exterior of the outer shell and the bladder, with the passage fitting having a neck extending away from the inner wall and outwardly of the outer wall; an o-ring disposed on the relief surface; an annular holder mounted on the passage fitting, with the annular holder having a first leg and a second leg, wherein the first leg and the second leg are interconnected and have substantially L-shaped cross sections, the annular holder disposed about the o-ring and the second side surface to retain the o-ring on the relief surface adjacent to the orifice; and a gasket disposed between the liner and the outer shell; wherein a portion of the neck is bent to retain the annular holder against the o-ring, wherein the o-ring is abutted by the outer wall of the passage fitting, by the relief surface of the raised portion and by the first leg and the second leg of the annular holder and thereby fully enclosing the o-ring and preventing fluidic communication between a space between the liner and the outer shell and the bladder along the outer wall of the passage fitting.