Overhead door failure prevention system and method of using same
US6318024A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 10, 1999 |
| Grant date | Nov 20, 2001 |
| Priority date | — |
| Expiry date | Dec 10, 2019 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE05Y2900/132
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A system for servicing an overhead door having a spring counter balance mechanism, an operator and a directional control system. The servicing system includes a counter, information cards, and contact cards. The counter includes a counting device and a numeric display. The counting device records the number of full cycles of the springs used in the counter balance mechanism measured from the fully closed position of the door. The numeric display shows this number of full cycles. An inspector of the door compares this number to the cycle failure specification for the springs used in the counter balance mechanism listed on the information cards. If replacement or attention is required, the inspector uses the contact cards to inform the appropriate parties that the door is not functioning properly or that the springs require attention.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.