Resources Contact Us Home
Water heating system

Image Number 2 for United States Patent #4401100.

A water heating system comprises a lower energy storage tank connected with a source of energy and an upper tank mounted on top of the lower. The upper tank may be a conventional water heater or a water storage tank connected at an outlet therefrom with an instantaneous type water heater, and the tanks are interconnected through a valve. The valve operates to direct incoming cold water through a heat exchanger in the lower tank for being preheated prior to introduction into the upper tank and accommodates a thermal syphon effect between the tanks when fresh water is not being supplied, whereby heat energy is automatically transferred from the lower to the upper tank. The lower tank may advantageously and economically comprise a conventional drum, for example a 55 gallon drum, and all system components are mounted in a cover assembly for the lower tank, so that the upper tank need not be specially fabricated, with the cover assembly also serving to support the upper tank.

  Recently Added Patents
Recombinant negative strand virus RNA expression systems and vaccines
Fuel cell system with mechanical check valve
Method and apparatus for the prevention of a service degradation attack
Tetrazolyl oxime derivative, salt thereof, and plant disease control agent
System and methods for random parameter filtering
Multi display device and method of controlling the same
Auto-provisioning of network services over an Ethernet access link
  Randomly Featured Patents
Method for making non-oriented magnetic steel sheet
Direct-pressure type mold clamping mechanism of an injection-molding machine
LED lamp for light source of lighting device
Testing base
Agricultural planter
Female communication connector of an automation device
Liquid storage installations
Method of and apparatus for manufacturing rolled medium products
Thermal power plants and method of operating a thermal power plant
Solar cooker