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. 25, 2003
Filed:
May. 02, 2001
Yong S. Chu, Glendale, CA (US);
Dynamo Aviation, Inc., Van Nuys, CA (US);
Abstract
A water heater apparatus for aircraft applications has three water heating tubes joined in series interconnection and positioned in side-by-side adjacency, where each of the tubes provides an electrical resistance heater part of a 3 phase electrical power circuit. Each tube also has a thermostat, and an electrical circuit breaker. The thermostats establish an open electrical circuit if water temperature exceeds a temperature set point. The circuit breakers establish an open circuit if electric current flow exceeds an electrical current set point. The apparatus uses a pressure check valve to expel pressure from the water heating tubes when pressure exceeds a water pressure set point. A temperature sensor is positioned for sensing water temperature at a water outlet and an ultrasonic water flow sensing switch identifies water flow in the water heating tubes.