Supporting bolt
US4373309A · kind A · utility
29Cited by
5References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 11, 1978 |
| Grant date | Feb 15, 1983 |
| Priority date | — |
| Expiry date | Sep 11, 1998 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T403/335
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A supporting bolt structure for connecting the ends of steps of a fabricated stairway including an elongated middle part having both internal and external threads at the ends thereof, a pair of internally threaded retainers mating with the external threads on the middle part and a pair of externally threaded headed portions mating with the internal threads of the middle part.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.