Patent · US Expired

Belt drive back up device for escalator drive

US6527099B2 · kind B2 · utility

6Cited by

12References

12Claims

0Family size

Assignee

OTIS ELEVATOR COMPANY · US

Inventors

Joerg Ostermeier · Bückeburg, DE
Helmut Meyer · Bückeburg, DE
Andreas Stuffel · Porta Westfalica, DE

Key dates

Filing date	Jul 12, 2002
Grant date	Mar 4, 2003
Priority date	—
Expiry date	Jul 12, 2022

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB66B23/028
WIPO fieldHandling
WIPO sectorMechanical engineering

Abstract

An escalator drive machine includes a motor output sheave which drives a drive belt along a closed look between the output sheave and a drive sprocket. The output sheave engages the drive belt with the step chain such that the step chain and attached tread plates are propelled from one landing to the other. The output sheave includes a first set of teeth and a second set of teeth. The first set of teeth is around the output sheave hub to engage a set of belt teeth extending from the drive belt. The second set of teeth is preferably located along a rim of the output sheave and is engageable with corresponding link teeth located along each link in the drive chain. The second set of teeth maintain their relationship with the corresponding link teeth due to the first set of teeth, however, there is no contact therebetween. However, should the drive belt fail or become disengaged, the second set of teeth engage the corresponding link teeth. The step chain and attached tread plates are thereby prevented from moving independently.

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