Parking brake declutching system
US4530427A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 9, 1982 |
| Grant date | Jul 23, 1985 |
| Priority date | — |
| Expiry date | Dec 9, 2002 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60W10/18
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A parking brake declutching system which places an earth-working machine transmission in neutral when the parking brake is engaged and prevents the transmission from being re-engaged until the parking brake is released. The parking brake declutching system includes a parking brake valve, a declutch valve, and a pair of service brake valves with the parking brake valve being connected to a spring applied, air released parking brake actuator. The declutch valve is also connected to the parking brake actuator and to a clutch cut-out actuator which selectively disengages the transmission. When the parking brake valve is positioned to actuate the parking brake, the declutch valve is positioned to direct compressed air to actuate the clutch cut-out actuator which disengages the transmission for the machine. If the parking brake valve is opened, compressed air is directed to the parking brake actuator for disengaging the parking brake. Simultaneously, air is directed to the declutch valve to position the declutch valve for releasing the clutch cut-out actuator by permitting the exhaust of air from the cut-out actuator. The transmission may then be re-engaged since the parking brake is rel…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.