Variable rate meter drive system
US6851377B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 3, 2003 |
| Grant date | Feb 8, 2005 |
| Priority date | — |
| Expiry date | Jun 3, 2023 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S111/921
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.