초록 ▼

A bolt-on fitting is shown for coupling a fitting to an object having external sidewalls and a normally closed interior containing a liquid, such as a water heater tank or boiler. The bolt-on fitting has a body with an inner surface and an outer surface. A plurality of bolt openings are spaced about

A bolt-on fitting is shown for coupling a fitting to an object having external sidewalls and a normally closed interior containing a liquid, such as a water heater tank or boiler. The bolt-on fitting has a body with an inner surface and an outer surface. A plurality of bolt openings are spaced about the periphery of the body. An O-ring is located on the inner surface for sealing between the flange and the mating surface on the tank. The inner surface of the flange is concave, being curved about both a horizontal and a vertical axis drawn to bisect the body so that the bolt openings form isolated points of contact with the tank surface when the flange is bolted into position.

대표청구항 ▼

A bolt-on flange for a water heater tank or boiler of the type having cylindrical external sidewalls provided with a plurality of outwardly extending threaded bolts, and a nut for each bolt the flange comprising: a body having an inner surface adapted to be supported at a selected location on the ta

A bolt-on flange for a water heater tank or boiler of the type having cylindrical external sidewalls provided with a plurality of outwardly extending threaded bolts, and a nut for each bolt the flange comprising: a body having an inner surface adapted to be supported at a selected location on the tank sidewalls and an outer surface; a plurality of bolt openings spaced about the periphery of said body and communicating said inner and outer surfaces, the spacing of said bolt openings being selected to mate with the outwardly extending bolts on said tank sidewalls; an O-ring located on said inner surface for sealing between said flange and said cylindrical sidewalls when said flange is bolted in place; retaining means for maintaining the position of said O-ring on said inner surface; and wherein said inner surface is concave, being curved about both a horizontal and a vertical axis drawn to bisect the body, thereby forming a spherical-shaped void on said inner surface, said bolt openings forming isolated points of contact with said tank sidewalls when said flange is bolts into position by tightening said nuts on said threaded bolts.