Corner locking and associated pivot means for extruded plastic sash windows
US4578903A · kind A · utility
60Cited by
6References
34Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 20, 1984 |
| Grant date | Apr 1, 1986 |
| Priority date | — |
| Expiry date | Apr 20, 2004 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE05Y2900/148
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A window sash of a double-hung window assembly has framing members formed of extruded plastic material of one configuration providing a hollow formation extending therethrough and opening to the ends thereof. Support and connector members are installed internally of the framing members to form and rigidify the corner miter-joints therebetween. The support and connector members include internal latch means for maintaining the sash vertical and internal pivot means for pivoting the sash inwardly when the latch means is released.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.