Patent Number: 6,530,403

Title: Fill tube control apparatus

Abstract: A control mechanism for controlling the flow of a particulate materialthrough a conduit and comprises a bladder mounted within the conduit thatis inflatable between a first, deflated state and a second, inflatedstate. In its first, deflated state the bladder allows the particulatematerial to flow freely through the conduit, and in its second, inflatedstate the conduit is substantially blocked by the inflated bladder and noparticulate material may pass. An alternate embodiment of an exteriorlymounted control mechanism comprises a stopper that is moved between afirst, open position away from an open end of the conduit and a second,closed position in which the stopper is in sealing contact with end of theconduit.

Inventors: McGregor; James R. (Lakeville, MN), Anderson; Scott (Owatonna, MN), Kruckeberg; Keith (Owatonna, MN)


International Classification: B65B 1/30 (20060101); B65B 1/46 (20060101); B65B 1/10 (20060101); B65B 1/12 (20060101); B65D 90/56 (20060101); B65D 90/00 (20060101); G01G 13/02 (20060101); G01G 13/00 (20060101); B67C 003/26 (); B67C 003/34 ()

Expiration Date: 03/12015