Rail-lifting implement
US4002320A · kind A · utility
Inventor
Key dates
| Filing date | Oct 29, 1975 |
| Grant date | Jan 11, 1977 |
| Priority date | — |
| Expiry date | Oct 29, 1995 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE01B29/22
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A frame comprises cross-members. Two longitudinal beams are associated with the frame. At least one of the beams is detachably associated with the cross-members. An arm extends transversely to the beams between the same and is pivotally connected to the frame by an articulated joint. A drive mechanism is provided to impart a pivotal movement to the arm about the articulated joint. Upwardly facing, low-friction bearings are carried by the arm between the beams and spaced from the articulated joint. The frame is adapted to be pushed under a rail and to assume a condition in which the beams extend along the rail on opposite sides thereof and rest on two spaced apart ties supporting the rail and the bearings engage the rail from underneath between the ties.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.