Feed control hydraulic circuit for wood chipper attachment
US6293479A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 29, 1999 |
| Grant date | Sep 25, 2001 |
| Priority date | — |
| Expiry date | Nov 29, 2019 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB27L11/002
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A hydraulic circuit for a wood chipper attachment for a skid steer loader provides power to both a motor for driving a chipper wheel and a motor for driving a feed roller. A priority flow valve is provided to supply priority of flow to the chipper motor. As pressure increases on the chipper motor, the output from the skid steer loader pump reduces and the priority flow valve acts to reduce flow to the feed motor to reduce the infeed speed. The wood chipper is adapted to be mounted on a skid steer loader and utilize the hydraulic power source from the loader power source. A separate relief valve for the chipper wheel motor is set to relieve pressure if the chipper wheel motor stalls at a lower pressure than the relief valve for the hydraulic system on the skid steer loader so that the feed motor will have sufficient pressure for reversing the feed wheel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.