Drive roller unit

US6135269A · kind A · utility

Assignee

• Telair International GmbH · DE

Inventors

• Thomas Huber · Schliersee, DE
• Martin Durrwaechter · Irschenberg, DE
• Matthias Urch · Poing, DE
• Benedikt Kieser · Miesbach, DE

Key dates

• Filing date: Feb 22, 1999
• Grant date: Oct 24, 2000
• Expiry date: Feb 22, 2019

Classification

• Technology area (CPC G): Physics
• CPC primary: G01N19/02
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A drive roller unit is provided for use in a roller drive unit for the conveyance of objects on the freight deck of an aircraft. The drive roller unit comprises a drive motor to drive a drive roller which, when in an operating position, can be brought into frictional engagement with the bottom of an object to be conveyed. A lifting mechanism with a lifting motor is used to raise the drive roller from a retracted, resting position into the raised, operating position. A control apparatus controls operation of the drive motor and the lifting motor. A differential velocity measuring means is also provided for measuring a difference between a velocity of the drive roller and a velocity of said object being conveyed to determine a slippage. The control means comprises a regulating means to which an output signal from the differential velocity measuring means is sent and which regulates the control means and thereby the drive motor and/or the lifting motor in such a way as to reduce any slippage between the drive roller and the bottom surface of said object being conveyed.