Patents by Inventor Masashi Okushima

Masashi Okushima 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).

  • Vacuum cleaner
    Patent number: 7306640
    Abstract: A vacuum cleaner includes a first dirt separation unit and a second dirt separation unit. The first dirt separation unit has a first inlet port through which a suction air stream including dirt particles is introduced thereinto, and the second dirt separation unit has a second inlet port through which the air stream introduced into the first dirt separation unit is introduced into the second dirt separation. The first and the second inlet port are disposed such that they are not registered with each other. Accordingly, the dirt particles suctioned are separated in two stages, thereby decreasing the possibility of occlusion of a filter and rapid deterioration of a suction force.
    Type: Grant
    Filed: October 23, 2003
    Date of Patent: December 11, 2007
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Yoshiki Kuroki, Seiji Yamaguchi, Tomonori Kato, Masashi Okushima, Yuichi Shimizu, Tomomi Mitani, Hiroshi Mori, Toru Odachi, Yoshiaki Onishi, Hidenori Kitamura, Toshifumi Miyahara, Takaaki Ogawa, Hirokazu Nagaoka
  • Vacuum cleaner capable of compressing dirt
    Patent number: 7047593
    Abstract: A vacuum cleaner includes a main body having an electric blower for generating a suction air flow, a dirt collecting case for centrifugally separating and collecting dirt, and a compression assembly for compressing dirt collected in the dirt collecting case to reduce a volume thereof. The dirt collecting case has a separation chamber for centrifugally separating dirt from the dirt containing air and a dirt collecting chamber in communication with the separation chamber for accumulating the dirt separated by the separation chamber. The compression assembly has a first air intake member provided in the separation chamber and communicating with the electric blower, a second air intake member provided in the dirt collecting chamber and communicating with the electric blower, a shielding plate for selectively opening the first and the second air intake member and an actuator for driving the shielding plate.
    Type: Grant
    Filed: August 8, 2002
    Date of Patent: May 23, 2006
    Assignee: Matsushita Electrical Industrial Co., Ltd.
    Inventors: Hidenori Kitamura, Saburo Kajikawa, Masakazu Onda, Seiji Ishikawa, Yasunori Tsuzaki, Masashi Okushima, Tetsuharu Nomachi, Koji Yamamura, Hirokazu Nagaoka
  • Vacuum cleaner
    Publication number: 20040128791
    Abstract: A vacuum cleaner includes a first dirt separation unit and a second dirt separation unit. The first dirt separation unit has a first inlet port through which a suction air stream including dirt particles is introduced thereinto, and the second dirt separation unit has a second inlet port through which the air stream introduced into the first dirt separation unit is introduced into the second dirt separation. The first and the second inlet port are disposed such that they are not registered with each other. Accordingly, the dirt particles suctioned are separated in two stages, thereby decreasing the possibility of occlusion of a filter and rapid deterioration of a suction force.
    Type: Application
    Filed: October 23, 2003
    Publication date: July 8, 2004
    Applicant: Matsushita Electric Industrial Co., Ltd.
    Inventors: Yoshiki Kuroki, Seiji Yamaguchi, Tomonori Kato, Masashi Okushima, Yuichi Shimizu, Tomomi Mitani, Hiroshi Mori, Toru Odachi, Yoshiaki Onishi, Hidenori Kitamura, Toshifumi Miyahara, Takaaki Ogawa, Hirokazu Nagaoka
  • Vacuum cleaner
    Publication number: 20030028994
    Abstract: A vacuum cleaner includes a main body having an electric blower for generating a suction air flow, a dirt collecting case for centrifugally separating and collecting dirt, and a compression assembly for compressing dirt collected in the dirt collecting case to reduce a volume thereof. The dirt collecting case has a separation chamber for centrifugally separating dirt from the dirt containing air and a dirt collecting chamber in communication with the separation chamber for accumulating the dirt separated by the separation chamber. The compression assembly has a first air intake member provided in the separation chamber and communicating with the electric blower, a second air intake member provided in the dirt collecting chamber and communicating with the electric blower, a shielding plate for selectively opening the first and the second air intake member and an actuator for driving the shielding plate.
    Type: Application
    Filed: August 8, 2002
    Publication date: February 13, 2003
    Applicant: Matsushita Electric Industrial Co., Ltd.
    Inventors: Hidenori Kitamura, Saburo Kajikawa, Masakazu Onda, Seiji Ishikawa, Yasunori Tsuzaki, Masashi Okushima, Tetsuharu Nomachi, Koji Yamamura, Hirokazu Nagaoka