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
Semiconductor device and manufacturing method thereof
Method and apparatus for using service capability information for user plane location
Method, apparatus, and manufacture for adaptation of video encoder tuning parameters
Image forming apparatus and job request control method instructed by authenticated users
Emulsions containing arylboronic acids and medical articles made therefrom
Performing failover for a plurality of different types of videoconferencing devices
Non-transitory computer readable recording medium storing print management program, print management device, print management method, and print system
  Randomly Featured Patents
Constant velocity radial inflow particle separator
Hand held scanner
Vacuum suspended disc brake
Current-driven signal interface implemented in semiconductor integrated circuit device
Low voltage cutoff circuit with short circuit detection capability and method of operation thereof
Technique for effectively communicating multiple digital representations of a signal
Network operating system
Lantern battery housing with three springs
Treatment of skin conditions with oxysterol activators of LXR.alpha.
Method for modifying switching field characteristics of magnetic tunnel junctions