Condition-based, auto-thresholded elevator maintenance
US6604611B2 · kind B2 · utility
19Cited by
11References
23Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 28, 2001 |
| Grant date | Aug 12, 2003 |
| Priority date | — |
| Expiry date | Dec 28, 2021 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB66B5/0087
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
Variable thresholds (662, 663) are generated in response to an average defect rate (669, 690) generated under certain conditions (683-687, 696-698), excesses of which can set an internal flag (670). If an information request (720) or service personnel visit to the elevator site (721) occur, the internal flag, or the upward adjustment of the average defect rate (691) can generate a maintenance flag (773) which ultimately results in a maintenance recommendation message related to the particular parameter having a notable defect.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.