Patents by Inventor Shozo Hase

Shozo Hase 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).

  • Scroll gas compressor having asymmetric bypass holes
    Patent number: 6273691
    Abstract: It is an object of the present invention to improve the efficiency of a scroll gas compressor by operating a bypass at a proper compression ratio. To achieve the object, the present invention is constituted so that at least one pair of bypass holes whose one ends are opened in a compression chamber currently performing compression nearby a discharge vent and whose other ends communicate with a discharge chamber are asymmetrically arranged on a panel board. This structure makes it possible to improve the efficiency of the compressor by operating the bypass at an optimum compression ratio even if a difference is observed between pressure rises of a pair of symmetric compressed spaces under the compression process.
    Type: Grant
    Filed: July 17, 1997
    Date of Patent: August 14, 2001
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Takashi Morimoto, Sadayuki Yamada, Shuichi Yamamoto, Kiyoshi Sawai, Taisei Kohayakawa, Shozo Hase, Hiromasa Ashitani
  • Scroll compressor
    Patent number: 6102671
    Abstract: Base wraps 21a and 31a of a fixed scroll 20 and orbiting scroll 30 both have spiral lengths that satisfy specified compression ratio in low speed drive region. Spiral shaped extension wraps 21b and 31b are provided for at least one of the base wraps 21a and 31a, extended from the spiral end position thereof, and a displacement is effected in the direction in which the thickness of the wraps 21 and 31 becomes thinner, at least at either the inner walls of the extension wraps 21b and 31b or at the outer walls of the wraps 21 and 31 in opposition thereto, making the interrelationship greater.
    Type: Grant
    Filed: August 10, 1998
    Date of Patent: August 15, 2000
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Shuichi Yamamoto, Kiyoshi Sawai, Taise Kohayakawa, Shozo Hase, Takashi Morimoto, Hiromasa Ashitani, Hiroyuki Fukuhara
  • Sealed-type scroll compressor and assembling method therefor
    Patent number: 5704122
    Abstract: In a sealed-type scroll compressor having a stationary scroll member and an orbiting scroll member, the stationary scroll member is fixed after rotating it in an orbiting direction of the orbiting scroll member by a predetermined angle from a phase angle position where a possible orbiting radius between both scroll members is made maximum at the temperature before driving the scroll compressor.
    Type: Grant
    Filed: January 14, 1997
    Date of Patent: January 6, 1998
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Masahiro Tsubokawa, Osamu Aiba, Toshiharu Yasu, Shuichi Yamamoto, Hideo Hirano, Taisei Kohayakawa, Shozo Hase
  • Sealed-type scroll compressor with relatively shifted scrolls based on thermal coefficient of expansion
    Patent number: 5632610
    Abstract: In a sealed-type scroll compressor having a stationary scroll member and an orbiting scroll member, the stationary scroll member is fixed after rotating it in an orbiting direction of the orbiting scroll member by a predetermined angle from a phase angle position where a possible orbiting radius between both scroll members is made maximum at the temperature before driving the scroll compressor.
    Type: Grant
    Filed: December 22, 1994
    Date of Patent: May 27, 1997
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Masahiro Tsubokawa, Osamu Aiba, Toshiharu Yasu, Shuichi Yamamoto, Hideo Hirano, Taisei Kohayakawa, Shozo Hase