Variable drive mechanism for the panel of a gate or similar structure

US4888531A · kind A · utility

Assignee

• Hormann KG Antriebs- und Steuerungstechnik · DE

Inventor

• Michael Hormann · Bodenwerder, DE

Key dates

• Filing date: Feb 2, 1988
• Grant date: Dec 19, 1989
• Expiry date: Feb 2, 2008

Classification

• Technology area (CPC E): Fixed Constructions
• CPC primary: E05Y2900/106
• WIPO field: Civil engineering
• WIPO sector: Other fields

Abstract

Variable electrically motorized drive mechanism for gates or similar structure close-off devices that can be installed for the purpose of an assembly operation that is as heavy-duty as possible and without fine adjustments, for which purpose the gate is provided with controls that essentially comprise a position detector, a memory, and a reference-point indicator, the last of which is positioned between the gate-panel limiting positions and outside of any stop positions or defines a corresponding gate-panel reference-point position and synchronizes the position detector at each stroke such that the path that the panel is to travel along from the reference-point position into a particular desired position is dicated or monitored in accordance with a memory output that corresponds to the adjusted position. The system is accordingly continuously self-monitoring and can synchronize itself when the motor is started up again after a power outage and possibly manual operation of the gate.