Security grill for window opening
US4835906A · kind A · utility
6Cited by
4References
10Claims
0Family size
Inventor
Key dates
| Filing date | Sep 14, 1987 |
| Grant date | Jun 6, 1989 |
| Priority date | — |
| Expiry date | Sep 14, 2007 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE06B9/01
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A security grill structure for preventing entrance through a wall opening. The grill structure comprises a metal peripheral retention frame securable in the wall opening. The frame has opposed parallel channel members interconnected by opposed transverse bars. A lock is provided in one of the channel members and is operable from an inside face of the retention frame. A grill engaging element is secured to each of the transverse bars. A removably engageable metal grill is receivable in an opening defined by the peripheral retention frame and is engageable by the lock, the other channel member and the grill engaging element.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.