Insulator for rail interlock at upper/lower window sash interface
US4827685A · kind A · utility
41Cited by
11References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 18, 1987 |
| Grant date | May 9, 1989 |
| Priority date | — |
| Expiry date | Sep 18, 2007 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S49/01
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A modification for window or door assemblies having interlocks on the sash rails where insulating material is placed between the interlock of a lower rail to an upper sash and the interlock of an upper rail to a lower sash so as to act as a thermal barrier against heat conduction through the upper sash which is exposed to exterior climate of the building in which the window or door assembly is being used.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.