Patents by Inventor Hiroyuki Onogawa

Hiroyuki Onogawa has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Intake/exhaust type combustion equipment
    Patent number: 6295937
    Abstract: An intake/exhaust type combustion equipment capable of permitting oxygen in a proper amount required for stable combustion to be constantly fed to the combustion equipment, irrespective of outdoor air conditions. An intake air temperature detection sensor is arranged for detecting a temperature of combustion air fed to a burner by a combustion air feed fan and an oxygen data output element is arranged for outputting oxygen data corresponding to an oxygen concentration in combustion air depending on the temperature detected by the intake air temperature detection sensor. The oxygen data output element outputs oxygen data on the oxygen concentration or a variation in oxygen concentration based on the detected temperature.
    Type: Grant
    Filed: December 21, 2000
    Date of Patent: October 2, 2001
    Assignee: Toyotomi Co., Ltd.
    Inventors: Yutaka Nakanishi, Tomohiko Takeuchi, Hiroyuki Onogawa