Ladder joint for a folding collapsible ladder
US5353892A · kind A · utility
56Cited by
4References
1Claims
0Family size
Inventor
Key dates
| Filing date | Oct 14, 1993 |
| Grant date | Oct 11, 1994 |
| Priority date | — |
| Expiry date | Oct 14, 2013 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T403/32361
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A ladder joint includes a pivot, a first base plate mounted on the pivot and connected to a first side rail section of one side rail of a ladder, a second base plate mounted on the pivot and connected to a second side rail section of the side rail, a spring-supported lever pivoted to the pivot, a lock bolt inserted through an eccentric hole on the second base plate and controlled by the lever to engage into either of a series of eccentric holes on the first base plate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.