Driving and steering device for a loading platform
US3946823A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 10, 1974 |
| Grant date | Mar 30, 1976 |
| Priority date | — |
| Expiry date | Dec 10, 1994 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB62D7/144
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A low profile air cushion loading platform is provided with a driving and steering device comprising a plurality of laterally spaced steering boxes located under the platform. Each steering box includes a plurality of wheel members adapted to be driven by motors about horizontal axes of rotation, with the wheel members and their driving motors being located within a ball race and rotatable with said ball race as a unit about a vertical axis. The ball race has gear teeth which cooperate with a driving gear operated by an electrohydraulic steering system to rotate the ball races of different ones of the steering boxes through different angles respectively during the steering operation, to cause the wheel members of all the steering boxes to be driven along arcs having a common center of curvature.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.