Rotatable bending joint for collapsible playpen
US5542151A · kind A · utility
52Cited by
7References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 1, 1995 |
| Grant date | Aug 6, 1996 |
| Priority date | — |
| Expiry date | May 1, 2015 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T403/32368
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
An improved rotatable joint of the kind disclosed in U.S. Pat. No. 5,381,570 for foldable tubular playpen frames having a step in the tooth of a recessed sprocket portion in which a connecting gear rests. In order to unlock the joint one must move the gear axially inwardly with a pushbutton as well as relieve the stresses on the joint by lifting up the tubular bars connected to the joint so that the gear may slip off the step. In this way an additional factor of safety is built-in in order to unlock the joint, and accidental release is reduced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.