Adjustable tray riser
US5054629A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 6, 1990 |
| Grant date | Oct 8, 1991 |
| Priority date | — |
| Expiry date | Aug 6, 2010 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA47B87/0261
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
An adjustable support riser for vertically stacking letter trays is disclosed, comprising a riser body (10) having a lower clothespin type attachment configuration (30, 32, 42) for securing to a lower letter tray, and an upper attachment socket (12) for attaching to a downwardly projecting (52) foot projection of an upper letter tray, whereby the upper and lower letter trays are in a spaced apart orientation. The upper attachment socket is provided with an elongate ovular shape of enlarged dimension, whereby the upper tray can selectively placed in either a forward or a rearward socket location relative to the upper end of the riser. The orientation of the upper letter tray relative to the lower letter tray can thereby be selectively altered from a parallel and co-aligned configuration to a staggered or stepped configuration. The lower attachment means of each riser is provided with offset cantilevered fingers (30, 32, 42), which distribute stress along the line of attachment to the lower letter tray. A reinforcement flange (40) is provided to extend along each cantilevered inward finger, whereby adding rigidity and strength to the lower attachment point.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.