Detachable polygonal picture frame
US4738039A · kind A · utility
Inventors
Key dates
| Filing date | Aug 12, 1986 |
| Grant date | Apr 19, 1988 |
| Priority date | — |
| Expiry date | Aug 12, 2006 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16B2200/65
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
A polygonal frame comprising a plurality of framing pieces and the same number of assembly devices. Both ends of each framing piece are slanted so as to fit together with matching slanted framing pieces. The rear side of each framing piece is set with an oblong recess and a longitudinal slot on an appropriate position proximate to each end thereof. Each assembly device comprises: an L-shaped assembly plate which consists of an L-shaped plate portion, two inclined supporting blocks disposed under opposite sides of the plate portion, and an L-shaped supporting rail with each of its two ends connecting to the two opposite supporting blocks; two inclined fastening blocks, each having a lengthwise groove on its lower central portion and a threaded vertical hole to enable a screw to go through; and two screws for engaging with the fastening blocks. An assembly device is put into the recesses and slots set on each two abutting framing pieces, thereby assembling them together by transverse fastening force which is produced by the rising of fastening blocks against the framing pieces when each screw engaged with the fastening block is advanced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.