Brushing – scrubbing – and general cleaning – Machines – With air blast or suction
Reexamination Certificate
2008-04-29
2008-04-29
Snider, Theresa T (Department: 3723)
Brushing, scrubbing, and general cleaning
Machines
With air blast or suction
C015S340200, C015S340300, C015S401000, C251S207000
Reexamination Certificate
active
10687482
ABSTRACT:
A floor-cleaning machine (10) has a chassis (12) that is mobile on a surface and carries an agitating mechanism (14) to engage the surface. A fluid delivery system (18) conveys fluid from a reservoir (16) to the surface proximate the agitating mechanism (14). The fluid delivery system (18) includes a flow control valve (20) having a body (24) and a flow control member in the form of a ball (22) constrained within the body (24) and rotatable about an axis. A first passage (30) and a second passage (32) are defined in the ball (22), with the second passage (32) having a cross sectional area smaller than a cross sectional area of the first passage (30). The ball (22) is pivotable between a high flow position and a low flow position. In the high flow position, the ball (22) is positioned to allow fluid flow from a upstream duct (26) to a downstream duct (28) through the first passage (30). In the low flow position, the ball (22) is positioned to allow fluid flow from the upstream duct (26) to the downstream duct (28) through the second passage (32). The fluid flow rates in the high and the low flow positions are each distinct and repeatable with adjustment of the ball (22), with the low flow position allowing a lesser fluid flow rate than the high flow position.
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Kamrath Alan
Kamrath & Associates PA
Nilfisk-Advance, Inc.
Snider Theresa T
LandOfFree
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