Patents by Inventor Takeshi Tomizawa

Takeshi Tomizawa 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: 5335425
    Abstract: In a dry-processing apparatus, a heat insulating container is interposed between an inner container for accommodating objects to be dried and a condensing outer container which is cooled by a fan. The inner container is made of a microwave transmittable material having excellent heat resistance. The adopted heat insulating container is made of a microwave reflecting material. Microwaves are generated by a microwave oscillator to heat the objects to generate vapor from the objects. The generated vapor contacts the cooled condensing outer container so as to be condensed into water. A temperature sensor is provided at the upper portion of the condensing outer container so as to detect the temperature of the generated vapor to thereby control the heating and drying operation.
    Type: Grant
    Filed: August 12, 1992
    Date of Patent: August 9, 1994
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Takeshi Tomizawa, Tatsuo Fujita, Kunihiro Ukai, Jiro Suzuki
  • Patent number: 5174042
    Abstract: An electric garbage disposer of a construction comprising a container means having an opening defined therein and made of microwave shielding material; and a garbage receptacle having a receiving mouth defined therein and made of material having both of a microwave permeable property and a gas permeable property. The garbage receptacle is adapted to be removably accommodated within the container means with the mouth substantially aligned with the opening of the container means. A microwave generating means is used for radiating microwaves into the container means to heat garbage contained in the garbage receptacle within the container means. A water component produced by the garbage as a result of microwave heating is drained to an outside of the garbage disposer.
    Type: Grant
    Filed: August 20, 1991
    Date of Patent: December 29, 1992
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Takeshi Tomizawa, Tatuo Fujita, Jiro Suzuki
  • Patent number: 5154067
    Abstract: A portable cooler for cooling an article by utilizing the endothermic and exothermic phenomenon pertaining to a chemical reaction is disclosed, in which an adsorbent and a working medium are sealed in a reaction chamber defined between an inner wall and an outer wall, a working medium retaining member is disposed on the inner wall inside the reaction chamber for holding therein the working medium, the working medium retaining member being spaced from the adsorbent disposed on the outer wall, and a heater is held in contact with the adsorbent for regenerating the same, at least a part of said outer wall constituting a heat radiating portion.
    Type: Grant
    Filed: December 13, 1991
    Date of Patent: October 13, 1992
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Takeshi Tomizawa, Koji Arita
  • Patent number: 5088302
    Abstract: A portable cooler for cooling an article by utilizing the endothermic and exothermic phenomenon pertaining to a chemical reaction is disclosed, in which an adsorbent and a working medium are sealed in a reaction chamber defined between an inner wall and an outer wall, a working medium retaining member is disposed on the inner wall inside the reaction chamber for holding therein the working medium, the working medium retaining member being spaced from the adsorbent disposed on the outer wall, and a heater is held in contact with the adsorbent for regenerating the same, at least a part of said outer wall constituting a heat radiating portion.
    Type: Grant
    Filed: April 11, 1991
    Date of Patent: February 18, 1992
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Takeshi Tomizawa, Koji Arita
  • Patent number: 5059338
    Abstract: A working fluid comprising trifluoromethane, chlorodifluoromethane and at least one halogenated ethane which consists of two carbon atoms, 1 or 2 hydrogen atoms, 0 to 2 chlorine atoms and balance of fluorine atoms and has a boiling point of not lower than -30.degree. C. under atmospheric pressure, which has very small influence on the ozone layer in the stratosphere and is suitable as a substitute working fluid for dichlorodifluoromethane.
    Type: Grant
    Filed: November 28, 1990
    Date of Patent: October 22, 1991
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Yuji Yoshida, Koji Arita, Takeshi Tomizawa
  • Patent number: 5012651
    Abstract: The structure is arranged in such a manner that nonazeotropic mixed refrigerant is enclosed therein and a fractioning/separating device is disposed in a low pressure circuit in the main circuit of refrigerating cycle so as to conduct separation operation, the fraction/separation can be conducted at a low pressure in a separation mode, the specific volume of refrigerant gas generated in a reservoir due to heat supplied from a heater is enlarged, and the velocity of gas which moves upwards in the fractioning/separating device can be increased, causing a gas-liquid contact to be promoted. As a result, high performance separation can be conducted at reduced quantity of heat, causing the density of high boiling point refrigerant reserved to be significantly raised. Thus, the composition in the main circuit becomes a composition enriched with low boiling point refrigerant exhibiting excellent heating performance so as to satisfactorily cope with an increase in the load.
    Type: Grant
    Filed: December 26, 1989
    Date of Patent: May 7, 1991
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Kazuo Nakatani, Mitsuhiro Ikoma, Yuji Yoshida, Takeshi Tomizawa, Koji Arita, Minoru Tagashira
  • Patent number: 4840042
    Abstract: A heat pump system which comprises a main heat pump circuit filled with non-azeotropic mixed coolant and including a compressor, a utility-side heat exchanger, a throttling device, a source-side heat exchanger, etc.,; a fractionating separator having an upper end fluid-connected with an exit side of the utility-side heat exchanger; a reservoir disposed beneath the fractionating separator and having a bottom fluid-connected through a shut-off valve with a low pressure piping on an inlet side of either the source-side heat exchanger or the utility-side heat exchanger; and a coolant ejector disposed between the compressor and the utility-side heat exchanger, wherein a gaseous medium generated from the fractionating separator when the reservoir is heated is guided to a suction port of the coolant ejector to flow into the main heat pump circuit.
    Type: Grant
    Filed: July 29, 1988
    Date of Patent: June 20, 1989
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Mitsuhiro Ikoma, Kazuo Nakatani, Yuji Yoshida, Takeshi Tomizawa, Koji Arita