Back to results
US 6,640,494 B2Granted
Drive for closing devices with variable speed output
AssigneeMarantec Antriebs-und Steuerungstechnik GmbH & Co. KG
InventorMichael Hörmann
Life of this patent
Estimating the term…
Abstract
A drive system for closing devices, for example gates or shutters, with a variable speed output drive and a device for detecting a given characteristic of the drive, and is varied to maintain a substantially constant speed of the closing device as it moves between the open position and the closed position.
Claims7
A driving system for a closing device having
- a variable speed output drive for driving the closing device between an open and a closed position along a predetermined path,
- a device that detects a position of the closing device along the predetermined path,
- means for controlling output of the variable speed output drive depending upon both the position of the closing device along the predetermined path and given mechanical closing characteristics of the drive at several points along the predetermined path of the closing device, to ensure substantially constant speed of the closing device between a start-up phase and a stopping phase along the path, wherein
- said controlling means includes an intelligent mode for determining the mechanical closure characteristics by measuring a torque of the drive for each of said several points along the predetermined path of the closing device.
1 more element
Dependencies are inferred from the claim text.