Patents by Inventor Sadao Higami

Sadao Higami 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).

  • Refrigerant processing apparatus for collected equipment, and oil separator
    Patent number: 6779359
    Abstract: There are provided a high-yield economical, refrigerant processing apparatus for collected equipment which can recover and regenerate a liquid refrigerant by highly efficient thermal conversion and charge collected equipment with the liquid refrigerant, without releasing the refrigerant into the air, and an oil separator for use with the refrigerant processing apparatus. In the oil separator, an oil is separated from an oil-containing refrigerant to be recovered, and in a condenser, a gaseous refrigerant is converted into a liquid refrigerant. The oil separator has a heat exchanging double spiral pipe in which a double pipe made of a central pipe and an external pipe is formed spirally about a vertical central axis of the oil separator, and a heating unit for vaporizing the liquid refrigerant.
    Type: Grant
    Filed: March 14, 2003
    Date of Patent: August 24, 2004
    Assignee: Dengen Co., Ltd.
    Inventor: Sadao Higami
  • Refrigerant processing apparatus for collected equipment, and oil separator
    Publication number: 20030196450
    Abstract: There are provided a high-yield economical, refrigerant processing apparatus for collected equipment which can recover and regenerate a liquid refrigerant by highly efficient thermal conversion and charge collected equipment with the liquid refrigerant, without releasing the refrigerant into the air, and an oil separator for use with the refrigerant processing apparatus. In the oil separator, an oil is separated from an oil-containing refrigerant to be recovered, and in a condenser, a gaseous refrigerant is converted into a liquid refrigerant. The oil separator has a heat exchanging double spiral pipe in which a double pipe made of a central pipe and an external pipe is formed spirally about a vertical central axis of the oil separator, and a heating unit for vaporizing the liquid refrigerant.
    Type: Application
    Filed: March 14, 2003
    Publication date: October 23, 2003
    Inventor: Sadao Higami
  • Refrigerant charging apparatus
    Patent number: 4958501
    Abstract: In a refrigerant charging apparatus for charging a refrigerant by using a refrigerant can (1), an upper can-opening part (21), a conduit (6) having two ways of inner passages for indication and charging and a lower can-opening part (6A), and a level indicator (4) communicated with the refrigerant can via both can-opening parts are provided in order to correctly indicate remaining quantity of the refrigerant in the can.
    Type: Grant
    Filed: July 11, 1989
    Date of Patent: September 25, 1990
    Assignees: Matsushita Electric Industrial Co., Ltd., Fukuhou Teisan Co., Ltd., Dengen Co., Ltd.
    Inventors: Genichi Nakano, Sadao Higami, Yasutaka Hashimoto