Rigid rail safety device
US4193475A · kind A · utility
29Cited by
5References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 23, 1977 |
| Grant date | Mar 18, 1980 |
| Priority date | — |
| Expiry date | Nov 23, 1997 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T24/3969
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A safety clamp slidably mounted on a vertical safety rail in proximity to a ladder is attached to a workman's belt by a pivotal actuating arm which shifts a wedge plate into clamping engagement with a safety carrier immediately under free fall conditions encountered if the workman falls from the ladder. The rail is spaced from the ladder mounting brackets by circular sleeves.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.