Patent · US Expired

Drive for closing devices with variable speed output

US6640494B2 · kind B2 · utility

26Cited by

22References

7Claims

0Family size

Assignee

MARANTEC ANTRIEBS-UND STEUERUNGSTECHNIK GMBH & CO. KG · DE

Inventor

Michael Hormann · Bodenwerder, DE

Key dates

Filing date	Jan 29, 2001
Grant date	Nov 4, 2003
Priority date	—
Expiry date	Jan 29, 2021

Classification

Technology area (CPC G)Physics
CPC primaryG05B2219/45242
WIPO fieldCivil engineering
WIPO sectorOther fields

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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.