Vacuum control for seed planter

Details Vacuum control for seed planter Vacuum control for seed planter

2008-05-20

2008-05-20

Novosad, Christopher J. (Department: 3641)

Planting

Drilling

Having depositor feature

C111S900000, C111S921000, C111S922000

Reexamination Certificate

active

07373890

ABSTRACT:
A seed planting unit provides a manifold connecting a vacuum to multiple metering disks. The manifold includes valves to sequentially connect the manifold branches to the seed unit so as to moderate the peak air flow necessary to be handled by the vacuum source reducing horsepower drain and cost of the vacuum source itself.

REFERENCES:
patent: 3627173 (1971-12-01), Kerker
patent: 4280419 (1981-07-01), Fischer
patent: 4513957 (1985-04-01), Schaefer, Jr.
patent: 5265547 (1993-11-01), Daws
patent: 5606767 (1997-03-01), Crlenjak et al.
patent: 5940926 (1999-08-01), Inzinna et al.
patent: 6012199 (2000-01-01), Litomisky et al.
patent: 6308646 (2001-10-01), Luxon
patent: 6505569 (2003-01-01), Richard
patent: 6644225 (2003-11-01), Keaton

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