Dragline bucket dump compensator
US5992061A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 25, 1997 |
| Grant date | Nov 30, 1999 |
| Priority date | — |
| Expiry date | Jul 25, 2017 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE02F3/58
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A hoisting assembly for use with a dragline bucket that includes a compensator for generally stabilizing the attitude of the bucket. The compensator is operably coupled to the lift, hoist and dump lines. The connector for the lift line(s) defines a fulcrum about which the compensator turns during use. As the tension in the dump line increases relative to the tension of the hoist lines, the compensator turns about the fulcrum to lift the hoist lines and shift the sheave supporting the dump line forward. As the tension in the dump line decreases relative to the tension of the hoist lines, the compensator turns about the fulcrum in the opposite direction to lower the lift lines and shift the sheave supporting the dump line rearward.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.