초록 ▼

A flexible, water impervious liner is fitted in a rigid outer shell. The shell has an open top with a peripheral flange over which a top lip of the liner is fitted. A separate top plate attaches to the flange with standard fasteners for clamping the liner to the shell. Through hull fittings are prov

A flexible, water impervious liner is fitted in a rigid outer shell. The shell has an open top with a peripheral flange over which a top lip of the liner is fitted. A separate top plate attaches to the flange with standard fasteners for clamping the liner to the shell. Through hull fittings are provided for heating elements at the side and inlet/outlet fittings at the top. The construction allows convenient access to virtually all components of the water heater, including the liner and the heating elements, so that they can be quickly and easily serviced or replaced. A desired amount of insulation can be provided by an appropriate cover or blanket to surround the outer shell.

대표청구항 ▼

1. A water heater comprising:a rigid shell having an open interior and an open top; a liner of flexible, water impervious, nonmetal material separate from but received within the open interior of the shell, for holding a quantity of water, the shell providing structural support for the liner; a valv

1. A water heater comprising:a rigid shell having an open interior and an open top; a liner of flexible, water impervious, nonmetal material separate from but received within the open interior of the shell, for holding a quantity of water, the shell providing structural support for the liner; a valve communicating between the space between the liner and the shell and disposed in the upper portion of the shell; a top plate secured to the shell by removable fasteners for normally closing the top of the shell but openable to expose the liner for replacement thereof; and a heating element for heating water contained within the liner.