Pressure-compensating hydraulic system for preventing unauthorized use of a material handling implement
US4624106A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 22, 1984 |
| Grant date | Nov 25, 1986 |
| Priority date | — |
| Expiry date | Mar 22, 2004 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/7256
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A pressure-compensating hydraulic system is disclosed for preventing unauthorized use of an associated material handling implement. The system includes a variable displacement hydraulic fluid pump, and a load-sensing pressure-compensator for varying the output of the pump responsively to the pressurized fluid demands of the system. In order to prevent unauthorized use of the associated implement, the invention contemplates the provision of an override mechanism for negating the demand-responsive characteristics of the system. In this manner, a movable member of the implement, such as one of its stabilizers or its loader bucket, is positioned so as to immobilize the implement, with the member thus maintained in this position since the system will not respond to the demand for pressurized fluid to move the member from this immobilizing condition.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.