Collapsible trolley
US6425599B1 · kind B1 · utility
Inventor
Key dates
| Filing date | Nov 2, 2000 |
| Grant date | Jul 30, 2002 |
| Priority date | — |
| Expiry date | Nov 2, 2020 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB62B2206/04
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A collapsible trolley includes a main member provided with a retractable pull rod and a handle; a carrier frame, which has one end pivotally provided on the main member and is rotatable between an extended position and a collapsed position; two wheel assemblies, each of which includes a wheel frame and a wheel, the two wheel frame being pivotally provided on the main member such that the two wheel assemblies can be rotated outwardly to a use position or rotated inwardly to a collapsed position; and two first gears and two second gears, in which the two first gears are provided on the carrier frame, the two second gears being respectively provided on the wheel frames of the two wheel assemblies and inter-engaged with the two first gears. When the carrier frame is rotated to its extended position, it can bring the two wheel assemblies to rotate to their use position. When the carrier frame is rotated to its collapsed position, it can bring the two wheel assemblies to their collapsed position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.