Delivery cart

US6276471A · kind A · utility

Assignee

• Expresso Deutschland Transportgeräte GmbH · DE

Inventors

• Wolfgang Kratzenberg · Kassel, DE
• Siegfried Stein · Vellmar, DE

Key dates

• Filing date: Jan 12, 2000
• Grant date: Aug 21, 2001
• Expiry date: Jan 12, 2020

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02T10/70
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

A delivery cart including a chassis, one or two castors pivotable about a vertical axis and two support wheels for supporting the chassis on a ground, a substantially vertically extending displacement stirrup attached to the chassis, a gearless, load-actuated reversible electric motor, formed integrally with the respective wheels, and a control system for controlling power supply to the electric motors and including sensors for sensing a displacement force or a steering force applied to the cart, and a free-programmable control unit for controlling power supply to the electric motors, in accordance with the one of a displacement force and a steering force.