Mining shield base lift apparatuses and methods
US11772209B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 22, 2022 |
| Grant date | Oct 3, 2023 |
| Priority date | — |
| Expiry date | Apr 22, 2042 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21D23/0436
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A longwall mining shield base lift. The base lift includes a hydraulic cylinder having an apparatus for coupling the hydraulic cylinder to the longwall mining shield, a cylinder rod having a first end extending into the hydraulic cylinder and a second end for extending toward ground beneath the longwall mining shield, the second end being threaded axially, and a threaded wear pad threaded onto the cylinder rod. The wear pad includes a plurality of spanner holes for rotating the wear pad with a lever, at least one threaded retaining hole extending axially through the wear pad, and a retaining bolt threaded through the retaining hole until it contacts the cylinder rod.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.