Brushing – scrubbing – and general cleaning – Machines – With air blast or suction
Reexamination Certificate
2011-07-19
2011-07-19
Smith, Duane (Department: 1776)
Brushing, scrubbing, and general cleaning
Machines
With air blast or suction
C015S352000, C015S415100, C055S433000, C055S467000, C055S385100
Reexamination Certificate
active
07979957
ABSTRACT:
A vacuum cleaner attachment useful to collect dispersed packing particulates and the like comprises a thin-walled polymeric enclosure defined by a plurality of generally planar panels surrounding at their free edges a receiving opening through which the particulates are collected by the vacuum draw against a perforated screening structure. As the particulates accumulate in the enclosure the large pressure drop across the outer ranks thereof produces inward pressure forces across the panels, resulting in the inward flexures thereof to assist in the retention of the particulates in the enclosure as it is moved over a collection receptacle.
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Bak-Boychuk I. Michael
Pham Minh-Chau
Smith Duane
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