Removable mullion assembly
US6131338A · kind A · utility
9Cited by
14References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 4, 1999 |
| Grant date | Oct 17, 2000 |
| Priority date | — |
| Expiry date | Jan 4, 2019 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE06B1/524
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
The removable mullion assembly allows a mullion to be removed, thereby allowing wider objects to pass through double doors. The top fitting of the assembly includes a spring loaded retaining bolt which locks the mullion in place. A locking mechanism attached to the top fitting allows the retaining bolt to be disengaged from the mullion. However, in the event of a fire, a meltable platform within the top fitting releases a deadlock, which mechanically blocks the retaining bolt from disengaging the mullion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.