Anti-rollback mechanism for a loader mechanism of an off-highway implement
US5501570A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 21, 1994 |
| Grant date | Mar 26, 1996 |
| Priority date | — |
| Expiry date | Jan 21, 2014 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T74/20201
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An anti-rollback mechanism is provided for an off-highway implement having a mobile frame and a loader mechanism including a bucket pivotally attached between lift arms of the loader mechanism. The lift arms are connected to the frame of the implement and lift actuators are used to angularly move the lift arms to elevationally position the bucket. Tilt actuators connected to the bucket and to the lift arms effect rolling movements of the bucket relative to the lift arms. A single handled control mechanism regulates operation of the tilt and lift actuators through hydraulic tilt and lift valves. The anti-rollback mechanism of the present invention automatically positions the tilt valve as the lift arms move through a predetermined range of angular movements relative to the frame to prevent rollback of the bucket past a generally level position as the lift arms and bucket are elevated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.