Sheet metal door frame and a method for installing the same in a doorway
US5295327A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 4, 1992 |
| Grant date | Mar 22, 1994 |
| Priority date | — |
| Expiry date | Jun 4, 2012 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE06B3/988
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A sheet metal door frame formed by a substantially horizontally arranged U-shaped head piece and a pair of substantially vertically arranged likewise U-shaped jambs. The jambs preferably have square-cut ends which are arranged to extend into cut-outs at opposite ends of the head piece. The head piece and jambs present side walls, each of which terminates in a free longitudinal end at which an outwardly bent flange is provided for attachment of architraves. The head piece may additionally have hook-shaped end portions formed in its side walls at its opposite ends. These hook-shaped end portions are arranged to overlap end portions of the corresponding side walls of the jambs so as to engage the outwardly bent flanges of the jambs.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.