Brushing – scrubbing – and general cleaning – Machines – With air blast or suction
Reexamination Certificate
2008-08-06
2011-11-29
Muller, Bryan R (Department: 3727)
Brushing, scrubbing, and general cleaning
Machines
With air blast or suction
C015S349000
Reexamination Certificate
active
08065778
ABSTRACT:
A robot cleaner that is capable of preventing dust collected in a dust tank from flowing backward outside when a situation in which the dust may be discharged outside occurs includes a cleaner body, a dust tank mounted in the cleaner body to collect dust, and a backward-flow preventing device to prevent dust from flowing backward outside through a suction port of the dust tank. The backward-flow preventing device includes a shutter unit to open and close the suction port and a stopper unit to drive the shutter unit.
REFERENCES:
patent: 1143959 (1915-06-01), Harris
patent: 2005/0015920 (2005-01-01), Kim et al.
patent: 2005/0115409 (2005-06-01), Conrad
patent: 2007/0157413 (2007-07-01), Roumagnac
patent: 20-0335861 (2003-12-01), None
Hong Jun Pyo
Joo Jae Man
Kim Chang Woo
Kim Dong Won
Muller Bryan R
Samsung Electronics Co,. Ltd.
Staas & Halsey , LLP
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