Bale thrower control system
US5941169A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 19, 1998 |
| Grant date | Aug 24, 1999 |
| Priority date | — |
| Expiry date | Feb 19, 2018 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA01F15/0875
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A baler for making parallelepiped bales is equipped with a bale ejector or thrower structure including a bale throwing pan supported by a four-bar linkage that is swung upwardly by a hydraulic throwing cylinder. A control valve structure including a solenoid-operated trip valve and a solenoid-operated pressure-relief valve is actuated for effecting pressurization of the throwing cylinder and throwing of a bale in response to a trip switch being closed in response to a trip pedal being rotated by a bale moving rearwardly on the throwing pan as it exits the baler bale chamber, the trip valve when actuated blocking a source of fluid pressure from normal communication with a fluid sump, and the pressure-relief valve when actuated being operable for maintaining the working fluid pressure at a value determined by a variable potentiometer connected in circuit with the solenoid of the pressure relief valve. The pressure of the fluid available for operating the throwing cylinder and, hence, the distance through which a given bale will be thrown, depends on the setting of the relief valve achieved through adjustment of the variable potentiometer. An interlock circuit is provided for preventi…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.