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:
Mar. 24, 1992
Filed:
Jan. 09, 1990
Paloma Kogyo Kabushiki Kaisha, Nagoya, JP;
Abstract
A liquid heating apparatus includes a pulse combustion burner mounted to a liquid vessel and having a combustion chamber secured to a side wall of the vessel and immersed in liquid in the vessel, a tailpipe connected at its one end to an exhaust port of the combustion chamber and immersed in the liquid, and a fuel supply conduit in communication with the combustion chamber and being provided thereon with an electrically operated valve which is closed in a deactivated condition to interrupt the supply of fuel into the combustion chamber and opened in an activated condition to permit the supply of fuel into the combustion chamber. An electric control system for the heating apparatus is arranged to detect an instant temperature of the liquid, to memorize a standard rise rate of temperature determined to be smaller than a rise rate of the instant temperature in a condition where a sufficient amount of liquid is stored in the vessel and to be larger than the rise rate of the instant temperature in a condition where there is not any liquid in the vessel, to compare the rise rate of the instant temperature with the standard rise rate and to produce an output signal for deactivation of the valve when the rise rate of the instant temperature is smaller than the standard rise rate.