The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 07, 1987
Filed:
Apr. 29, 1986
C K Krishnakumar, Lombard, IL (US);
Clyde K Schafer, Glendale Heights, IL (US);
Chamberlain Manufacturing Corporation, Elmhurst, IL (US);
Abstract
A compact continuous flow energy efficient gas fired water heater/boiler for use in residential, commercial and industrial buildings wherein cold water enters the heater and flows downward through an outer annulus and then rises up through an inner annulus around a central gas flue, and wherein combustion gas flows upward through the central flue and then downward through a set of heat-conductive tubes and finally upwardly through the middle annulus to the exit. Air flow blower provides draft. The burner is capable of burning gas at widely varying rates of gas flow and is regulated by a gas modulator valve approximately proportional to the rate of hot water usage and the force for the gas modulator is generated by an orifice type differential pressure generator in the inlet water pipe.