Metal picture frame
US6339891B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 30, 1999 |
| Grant date | Jan 22, 2002 |
| Priority date | — |
| Expiry date | Nov 30, 2019 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T403/553
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
A picture frame comprises mitred metallic frame sections, each of which has a locking channel and a rearwardly facing opening, and a corner piece in each corner of the frame to lock adjacent frame sections together. Each corner piece comprises an L-shaped locking plate and an L-shaped backing plate, with the legs of each plate extending into the locking channels of adjacent frame section. In one embodiment, each locking plate has a single threaded aperture at the junction of the two legs which form the L and a screw extending through the aperture into engagement with the associated backing plate. The screw is accessible through the rearwardly facing opening of adjacent frame sections at their mitred junction. In a second embodiment, a cam positioned at the junction of the legs of the two plates is rotated to force the plates apart.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.