Variable rate meter drive system

Details Variable rate meter drive system Variable rate meter drive system

2005-02-08

2005-02-08

Pezzuto, Robert E. (Department: 3671)

Planting

Drilling

Having depositor feature

C111S921000

Reexamination Certificate

active

06851377

ABSTRACT:
A hydraulic drive system provides a priority flow of hydraulic fluid to a variable rate drive system for powering the operation of the metering mechanisms before hydraulic fluid is supplied to a secondary drive mechanism for powering the operation of secondary devices, such as the fan mechanism or the loading auger. The hydraulic drive system includes a priority flow divider valve that diverts a predetermined flow rate to the variable rate drive system. The variable rate drive system includes a drive mechanism arranged in series for a plurality of metering mechanisms. The secondary drive system includes a selector valve that permits a selection between the alternative secondary devices. An alternative embodiment of the hydraulic drive system includes a counter balance valve that operates to provide a priority flow to the variable rate drive system.

REFERENCES:
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patent: 5131227 (1992-07-01), Iseman
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patent: 5918558 (1999-07-01), Susag
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patent: 6145455 (2000-11-01), Gust et al.
patent: 6182588 (2001-02-01), Bodie et al.
patent: 20010045294 (2001-11-01), Mayerle et al.

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