Brushing – scrubbing – and general cleaning – Machines – With air blast or suction
Reexamination Certificate
2004-09-30
2008-12-02
Redding, David A (Department: 3723)
Brushing, scrubbing, and general cleaning
Machines
With air blast or suction
C015S389000, C015S339000
Reexamination Certificate
active
07458131
ABSTRACT:
Disclosed herein is a method for determining a frequency of a power brush in a vacuum cleaner. According to the method of the present invention, a mechanical oscillation frequency of a driving unit, which includes a brush body reciprocated within a range of prescribed angles, and a torsion bar for providing a prescribed elastic force to angular rotation of the brush body, is set equally to a driving frequency of a power supply unit, which drives the driving unit, or is set a prescribed percentage higher or lower than the driving frequency of the power supply unit, so that the driving unit can resonate. A large amount of movement is obtained using a small amount of power by means of the resonance.
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English Language Abstract of JP 3-272724.
Gesellschaft fur Maschinendiagnose: “Fachbeitrag: Resonanz an Antrieben” Maschinendiagnose News, [Online] No. 03, 2000. pp. 1-4, download http://www.maschinendiagnose.de/Kundenzeitschrift/Zeit0003.pdf, Chapter “3 Resonanz;”.
Kim Sang Young
Lee Yo Han
Lim Jun Young
Yoo Myung Keun
Greenblum & Bernstein P.L.C.
LG Electronics Inc.
Redding David A
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