Brushing – scrubbing – and general cleaning – Machines – Brushing
Reexamination Certificate
2007-03-20
2007-03-20
Snider, Theresa T. (Department: 1744)
Brushing, scrubbing, and general cleaning
Machines
Brushing
C015S346000, C015S347000, C015S383000
Reexamination Certificate
active
10818540
ABSTRACT:
A vacuum sweeper includes a blower for pulling debris in a stream of air through a vacuum duct, past the blower, out a blower discharge duct and into a hopper. Debris settles to the bottom of the hopper and the air exits the hopper through a return air duct having a discharge opening. The discharge opening is positioned near a vacuum nozzle inlet of the vacuum duct such that dust and debris in the return air stream is pulled back into the vacuum duct. The air discharge opening and the return air duct are sized to be larger than the vacuum nozzle inlet. The speed of the air exiting the discharge opening is thereby reduced increasing the percentage of the return air pulled back through the vacuum nozzle inlet instead of being blown out of the vacuum chamber and into the atmosphere.
REFERENCES:
patent: 564013 (1896-07-01), Furnas
patent: 1459968 (1923-06-01), Bailly
patent: 2018791 (1935-10-01), Kern
patent: 3007191 (1961-11-01), Braun
patent: 3512206 (1970-05-01), Young
patent: 3662427 (1972-05-01), Hanna
patent: 3755851 (1973-09-01), Williams
patent: 3977039 (1976-08-01), Block
patent: 4006511 (1977-02-01), Larsen
patent: 4044422 (1977-08-01), Larsen
patent: 4099290 (1978-07-01), Hiszpanski
patent: 4109341 (1978-08-01), Larsen et al.
patent: 4310944 (1982-01-01), Kroll et al.
patent: 4457043 (1984-07-01), Oeberg et al.
patent: 4466156 (1984-08-01), Blehert
patent: 4570287 (1986-02-01), Kerschner et al.
patent: 4660248 (1987-04-01), Young
patent: 4773121 (1988-09-01), Young
patent: 4885817 (1989-12-01), Tanase
patent: 5317783 (1994-06-01), Williamson
patent: 5457848 (1995-10-01), Miwa
patent: 5613269 (1997-03-01), Miwa
patent: 5778648 (1998-07-01), Parkes et al.
patent: 5848521 (1998-12-01), Kobayashi
patent: 6070290 (2000-06-01), Schwarze et al.
patent: 6122797 (2000-09-01), Vanderlinden
patent: 6161250 (2000-12-01), Young et al.
patent: 6263540 (2001-07-01), Vanderlinden
Erickson & Kleypas LLC
Harper Industries, Inc.
Snider Theresa T.
LandOfFree
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