Modular cart
US6425591B1 · kind B1 · utility
Inventor
Key dates
| Filing date | Aug 11, 2000 |
| Grant date | Jul 30, 2002 |
| Priority date | — |
| Expiry date | Aug 11, 2020 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB62B2301/04
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A modular cart comprises a load carrying frame and a wheeled carriage supporting the load-carrying frame. The carriage includes a front carriage assembly pivotally coupled to a front of the frame and a rear carriage assembly pivotally coupled to a rear of the frame. The front and the rear carriage assemblies are substantially identical. Each carriage assembly comprises an axle pivotally coupled at a vertical midpoint axis to the load-carrying frame. The axle is pivotal about the vertical midpoint axis and is selectable between a first position pivotally fixed with respect to the load carrying frame and a second position freely pivotal about the axis. A caster wheel assembly is attached to each of the ends of the axle. The caster wheel assembly is pivotal about a vertical end axis and is selectable between a third position pivotally fixed with respect to the axle and a fourth position freely pivotal about the vertical end axis.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.