Fork-lift truck having three drive wheels with third wheel steerable
US4986387A · kind A · utility
35Cited by
9References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 7, 1989 |
| Grant date | Jan 22, 1991 |
| Priority date | — |
| Expiry date | Aug 7, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S180/908
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A fork-lift truck supported by two front wheels and a rear wheel carried by a dolly assembly. The dolly assembly is pivoted for movement about a vertical axis and a rack and pinion unit is provided to control the pivoting for steering with the rear dolly wheel. Hub units are provided in each wheel that include a hydraulic motor and an axially aligned torque hub to obtain the desired traction for each wheel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.