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1. (WO2001030228) VACUUM CLEANER

Pub. No.:    WO/2001/030228    International Application No.:    PCT/JP2000/007539
Publication Date: Fri May 04 01:59:59 CEST 2001 International Filing Date: Sat Oct 28 01:59:59 CEST 2000
IPC: A47L 5/14
A47L 9/08
A47L 9/24
Applicants: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.

KITAMURA, Hidenori

ISHIKAWA, Seiji

NOMACHI, Tetsuharu

OKUJIMA, Masashi

TSUZAKI, Yasunori

ONDA, Masakazu

MIYAHARA, Toshifumi

SUO, Kazuma

TANIGUCHI, Yoshihiro

SAKATANI, Hideaki

NISHIMURA, Tsuyoshi

TOKUDA, Tsuyoshi

MURATA, Yoshitaka

MORISHITA, Kazuhisa

YAMAGUCHI, Seiji

IMAI, Tetsuo

FUJITA, Koichi

Inventors: KITAMURA, Hidenori

ISHIKAWA, Seiji

NOMACHI, Tetsuharu

OKUJIMA, Masashi

TSUZAKI, Yasunori

ONDA, Masakazu

MIYAHARA, Toshifumi

SUO, Kazuma

TANIGUCHI, Yoshihiro

SAKATANI, Hideaki

NISHIMURA, Tsuyoshi

TOKUDA, Tsuyoshi

MURATA, Yoshitaka

MORISHITA, Kazuhisa

YAMAGUCHI, Seiji

IMAI, Tetsuo

FUJITA, Koichi

Title: VACUUM CLEANER
Abstract:
A vacuum cleaner which refluxes exhaust air from an electrically driven fan to a suction unit so as to utilize the exhaust air in removing dust from a cleaning-subject surface, wherein the vacuum cleaner includes a suction passageway (40) extending for air communication from a suction port (24) formed in a suction unit (21) to a dust collecting chamber (31), an exhaust passageway (41) through which at least part of the exhaust air discharged during driving of an electrically driven fan (32) is refluxed to the suction unit (21), the suction unit (21) having a rotary brush (26) driven for rotation by an electric motor (29), the suction unit (21) having a rotary brush (26) driven for rotation by an electric motor (29) housed therein, and wherein the dust collecting performance can be prevented from lowering, particularly on a carpet, due to the lowering of the negative pressure in the suction port (24) which occurs when the exhaust air from the electrically driven fan (32) is refluxed to the suction unit (21).