Patents by Inventor Katsumasa Sakamoto

Katsumasa Sakamoto 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).

  • Patent number: 6637235
    Abstract: A refrigerator which may allow vegetables kept more fresh by minimizing temperature fluctuations in a vegetable compartment. The refrigerator minimizes dehydration in food stored in the vegetable compartment, so that vegetables are kept fresh longer. The vegetable compartment is arranged so as to be surrounded by freezing temperatures, and cooled through radiation cooling without receiving blowing cool air thereto to minimize temperature fluctuations, so that vegetables may be keep more fresh. At the same time, the vegetable compartment is sealed so that convection does not occur thereby minimizing dehydration in food, so that food is allowed to be kept fresh longer. Furthermore, the refrigerator is provided with compartments whose temperatures may be set to freezing temperatures. The vegetable compartment is arranged so as to be surrounded by compartments whose temperatures are freezing temperatures via partition parts.
    Type: Grant
    Filed: April 2, 2002
    Date of Patent: October 28, 2003
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Katsumasa Sakamoto, Toshie Hiraoka, Keiji Ohya, Naho Misumi
  • Publication number: 20030046947
    Abstract: A fridge-freezer equipped with a deodorizing unit which has a filter including photocatalyst and a light emitting unit including an LED as a light source mounted on a substrate. The fridge-freezer is designed to solve problems posed by conventional fridge-freezers. One of the problems is that in the case of using a glass-tube type lamp such as a black light or a cold cathode tube as the light source, the light source becomes large in size which requires a large space for installation. This does not allow the deodorizing unit to be installed in the compartments in the refrigerator. Another problem is that the deodorizing unit was not designed to be safe for food in case that part of the deodorizing unit is damaged to give harmful damage to food.
    Type: Application
    Filed: April 24, 2002
    Publication date: March 13, 2003
    Applicant: MITSUBISHI DENKI KABUSHIKI KAISHA
    Inventors: Keiji Ohya, Mutsumi Kato, Katsumasa Sakamoto, Junji Yoshida, Naho Misumi
  • Publication number: 20030010056
    Abstract: A refrigerator which may allow vegetables kept more fresh by minimizing temperature fluctuations in a vegetable compartment. The refrigerator minimizes dehydration in food stored in the vegetable compartment, so that vegetables are kept fresh longer. The vegetable compartment is arranged so as to be surrounded by freezing temperatures, and cooled through radiation cooling without receiving blowing cool air thereto to minimize temperature fluctuations, so that vegetables may be keep more fresh. At the same time, the vegetable compartment is sealed so that convection does not occur thereby minimizing dehydration in food, so that food is allowed to be kept fresh longer. Furthermore, the refrigerator is provided with compartments whose temperatures may be set to freezing temperatures. The vegetable compartment is arranged so as to be surrounded by compartments whose temperatures are freezing temperatures via partition parts.
    Type: Application
    Filed: April 2, 2002
    Publication date: January 16, 2003
    Applicant: MITSUBISHI DENKI KABUSHIKI KAISHA
    Inventors: Katsumasa Sakamoto, Toshie Hiraoka, Keiji Ohya, Naho Misumi
  • Patent number: 6055826
    Abstract: A refrigerator having a main body; a refrigerating compartment arranged at an upper position in the main body to refrigerate foods; and at least three lower compartments vertically arranged under the refrigerating compartment; wherein at least one of the lower compartments is a freezer compartment for freezing foods, and one of the remaining lower compartments is a vegetable compartment to store vegetables or a switchable compartment to make a temperature zone therein switchable between a freezing temperature zone and a temperature zone for refrigerated foods, vegetables or chilled foods.
    Type: Grant
    Filed: September 23, 1998
    Date of Patent: May 2, 2000
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Toshie Hiraoka, Isao Naito, Noriyuki Suda, Mutsumi Kato, Hisashi Matsui, Hiroshige Konishi, Katsumasa Sakamoto
  • Patent number: 6044654
    Abstract: To provide a refrigerator capable of uniforming the temperature in the refrigerator by rapidly lowering the temperature at the door side of the refrigerator when the temperature rises by opening and closing a refrigerator door. Therefore, a cold air channel 18 is provided for the side of a refrigerator 6 separately from a cold air channel 11 at the back of the refrigerator 6 to control the amount of cold air supplied from side cold-air blowoff ports 23 by a side temperature sensor 20 and a side temperature damper 19.
    Type: Grant
    Filed: April 21, 1998
    Date of Patent: April 4, 2000
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Keiko Igari, Mutsumi Kato, Katsumasa Sakamoto, Kouichi Hashimoto, Takenori Adachi
  • Patent number: 5983654
    Abstract: In a freezer-equipped refrigerator, a refrigerating chamber or freezing chamber is divided into a plurality of sections having substantially same temperature zone. A temperature element is provided in each section, and an open/close damper and a duct for supplying cool wind for each section are also provided. In such a structure, control is made on whether or not cool wind should be supplied or not in accordance with a detected temperature.
    Type: Grant
    Filed: May 22, 1997
    Date of Patent: November 16, 1999
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Kazu Yamamoto, Toshie Hiraoka, Mutsumi Kato, Katsumasa Sakamoto, Kunihiko Yagi