Gas separation: processes – Filtering
Reexamination Certificate
2011-01-11
2011-01-11
Smith, Duane (Department: 1797)
Gas separation: processes
Filtering
C055S319000, C055S356000, C055S429000, C055S467000
Reexamination Certificate
active
07867323
ABSTRACT:
Methods and apparatus are disclosed that pick up and clean landscape rock using air under vacuum pressure. This apparatus provides a means for cleaning and reusing rock that has become aesthetically unattractive instead of removing the old landscape rock and replacing it with new rock. The invention also includes a device for separating debris from the vacuum airstream. This device may be used in combination with the device for picking up and cleaning landscape rock or may be used independently.
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Elwell Robert A.
Smith Duane
Turner Sonji
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