B - Operations – Transporting – 65 – G
Patent
B - Operations, Transporting
65
G
111/33.1
B65G 53/50 (2006.01) A01C 7/04 (2006.01) A01C 15/00 (2006.01) B65G 53/28 (2006.01)
Patent
CA 1294830
ABSTRACT OF THE DISCLOSURE A seed hopper construction for use in connection with rotary drum seed planter requiring positive pressure for its seed metering operation. The hopper comprises a tapering bottom wall with an opening therein and an internal duct associated with said wall and opening. An deformable tubular diaphragm valve is positioned in the duct and projects from the opening in the bottom wall. A vertical air pressure tube is mounted in the hopper and carries a two-position valve for directing air into the hopper or to the diaphragm valve. The pressure tube also has a bottom air inlet depending from the bottom wall. A centrifugal blower having a positive pressure side outlet communicates with the pressure tube air inlet and the seed drum. The blower has a negative pressure central opening in spaced registry with the diaphragm valve. With the two position valve in one position, equalized positive pressure is maintained in the drum and container for planting; with the valve in the second position, the diaphragm valve rolls a bell-shaped member into seating engagement with the negative pressure opening of the blower to create a negative pressure in the hopper for refilling seeds thereinto.
537256
Frase Roland J.
Wiemers George H.
Cnh America Llc
Gowling Lafleur Henderson Llp
LandOfFree
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