Rail cribber
US8910577B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 12, 2012 |
| Grant date | Dec 16, 2014 |
| Priority date | — |
| Expiry date | Jan 25, 2033 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE01B27/04
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A cribbing work head including a work head frame having a longitudinal extent and a lateral extent. At least two inverted U-shaped work arms are mounted parallel to one another on the work head frame and spaced longitudinally from each other for lateral reciprocating movement on the frame, each of the work arms having a replaceable tool secured to each free end of the inverted U-shaped work arm. A separate fluid power double cylinder is secured to the work head frame and to each of the inverted U-shape work arms for independently laterally reciprocating the work arms. A main cylinder of each of said fluid power double cylinders is operable to laterally reciprocatingly move a respective work arm and a secondary cylinder of each of the fluid power double cylinders operable to move a respective work arm to one of two discrete lateral starting points.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.