Chain guide for overhead door opener
US5176582A · kind A · utility
8Cited by
13References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 1, 1992 |
| Grant date | Jan 5, 1993 |
| Priority date | — |
| Expiry date | Jul 1, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T74/155
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A chain guide is provided for the otherwise unsupported upper run of the endless roller chain of a motor-driven garage door operator. With the chain loop in a vertical plane, the chain guide takes the form of a trough having at its bottom an upstanding central ridge which supports the chain by its rollers and with the links clear of contact with the floor and sides of the trough. The chain guide is supported indirectly by the trackage of the door operator, being mounted upon the fixed rail spacer of one form and carried upon the movable trolley of the other.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.