Delivery cart
AssigneeExpresso Deutschland Transpotgeräte GmbH
InventorsWolfgang Kratzenberg, Siegfried Stein
Life of this patent
Estimating the term…
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.
Claims18
A delivery cart, comprising:
- a chassis formed of longitudinal and cross-beams;
- at least one castor pivotable about a vertical axis and two wheels for supporting the chassis on a ground;
- a displacement stirrup attached to the chassis and towering above the chassis;
- two gearless, load-actuated reversible electric motors associated with the two wheels and formed integrally with the two wheels;
- a power source for the electric motors;
- and
- control means for controlling power supply to the electric motors and including sensor means for sensing at least one of a displacement force and a steering force applied to the cart, and a free programmable, electronic control unit for controlling power supply to the electric motors in accordance with the one of said displacement force and said steering force,
- wherein the control unit comprises an electronic computer and a free programmable memory associated with the computer 1 wherein the sensor means comprises at least two sensors, and wherein the computer has a separate input for each of the at least two sensors and a separate output for each of the two electric motors,
- wherein the free programmable memory stores data used for actuating the electric motor means and for controlling power supply thereto, the data including an allowable force to be applied by the user and variably predetermined operational characteristics of the cart, and
- wherein the computer comprises a further input for programming the free memory from outside, and the delivery cart further comprises computer means connectable with the further input for programming the free programmable memory.
Dependencies are inferred from the claim text.