Brushing – scrubbing – and general cleaning – Machines – With air blast or suction
Reexamination Certificate
2006-04-20
2008-09-23
Nguyen, Dung Van (Department: 3723)
Brushing, scrubbing, and general cleaning
Machines
With air blast or suction
C015S352000, C015S401000
Reexamination Certificate
active
07426769
ABSTRACT:
A vacuum truck includes a self-propelled vehicle, a storage tank, a vacuum source, a laterally-shiftable scraper, and a pullback scraper. Suction lines connect a collection area of the scrapers to the storage tank and to the vacuum source. The exhaust from the vacuum system heats the collection area and the suction line to prevent plugging by the cold vacuumed material. The vehicle's engine exhaust can also be controlled to serve as a second heat source that can be used. A fluffer comprises a rake pivoted to the scraper is extendable for fluffing bedding while performing the vacuuming operation. The truck includes a front discharge opening and auger for emptying the tank. The driver's cabin is in front and has high and low windows, such that all vehicle operations are easily seen.
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Nguyen Dung Van
Price Heneveld Cooper Dewitt & Litton LLP
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