Dragline hoe, method and apparatus
US4731941A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 30, 1986 |
| Grant date | Mar 22, 1988 |
| Priority date | — |
| Expiry date | Sep 30, 2006 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE02F3/48
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Method of excavating overburden from a mineral or coal deposit seam using a low wall winch component, a high wall which component and a hoe. The hoe is attached to the low wall winch component by one or more draglines and the hoe is attached to the high wall winch component by a tail line. The method includes the steps of: PA0 (i) moving the hoe by tensioning of the draglines by the low wall winch component through overburden created by preliminary drilling and blasting to move said overburden away from the mineral or coal deposit seams in one or more traverses wherein overburden is loaded onto the hoe and subsequently dumped onto a spoil bank; and PA0 (ii) moving the hoe at the end of the or each traverse back to the starting point of the traverse by untensioning of the draglines by the low wall winch component and tensioning of the tail line by the high wall winch component. There is also included dragline apparatus including the aforementioned low wall winch component, high wall winch component, and the hoe.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.