Playpen having a reinforced strength
US7694361B1 · kind B1 · utility
Inventor
Key dates
| Filing date | Apr 7, 2009 |
| Grant date | Apr 13, 2010 |
| Priority date | — |
| Expiry date | Apr 7, 2029 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA47D13/063
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
A playpen includes a top frame including four corner connectors, and four foldable articulations mounted between the corner connectors respectively. Each of the foldable articulations includes a mounting seat disposed between any two of the corner connectors, two main rods each having a first end pivotally connected with the mounting seat and a second end pivotally connected with the respective corner connector, and two auxiliary rods each having a first end pivotally connected with the mounting seat and a second end pivotally connected with the respective corner connector. Thus, each of the main rods, the respective auxiliary rods, the mounting seat of each of the foldable articulations and the respective corner connector form a substantially parallelogram or trapezium linkage to reinforce the structural strength of the top frame.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.