Overlapping and interlocking window sashes
US5446997A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 19, 1994 |
| Grant date | Sep 5, 1995 |
| Priority date | — |
| Expiry date | Jan 19, 2014 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE06B2003/4461
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A window assembly includes standard-sized sashes with lock and keeper rails that overlap and interlock such that adjacent sides of the rails are held in close proximity when the assembly is closed. The lock rail includes an exterior wall with an exterior edge that protrudes slightly. The keeper rail includes an interior wall with a first side, a substantially parallel second side and a top edge that extends between the two sides. The top edge includes an integral trough for receiving the protruding edge of the lock rail. When the assembly is closed, the protruding edge overlaps and interconnects with the keeper rail, such that the edge sits in the trough. The exterior wall of the lock rail is thus held in close proximity to the second side of the interior wall of the keeper rail and air flow between the rails is minimized. The rails preferably support strategically placed upper and lower gaskets, which are hidden from view when the assembly is closed. The keeper rail supports the lower gasket, which blocks air flow between the lower sections of the rails and provides a first layer of protection against air infiltration from the exterior of the structure. The lock rail supports the …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.