Dual side wall locking attachment for trays to vertical legs in sectional display rack
US4428487A · kind A · utility
Inventor
Key dates
| Filing date | Apr 15, 1982 |
| Grant date | Jan 31, 1984 |
| Priority date | — |
| Expiry date | Apr 15, 2002 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA47B87/0246
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
A sectional display rack comprising a novel construction of horizontal rectangular trays and support legs, each tray and leg formed of plastic, wherein both upper and lower sides on each tray bottom wall are formed with upstanding ribs defining a space between the rib and the side wall into which a wing portion of each support leg is fitted and in which wedge shaped cams are provided on side walls of the tray to lock in corresponding recess or groove portions in the wing portions of the supporting leg to lock the leg in position. A spaced apart pair of wedge shaped cams is provided in each wall and the cams in the upper wall portion above the floor of the tray are offset from those cams formed in the lower wall. The advantages of these upright rib projections on the bottom walls and the locking tabs in the side walls in the tray are to provide a stable rack and to permit a low cost molding operation for manufacturing the attachment means comprising ribs, cams and recesses above and below the tray floor. The ribs are each preferably formed with a rounded end at the trailing edge which co-acts with a reversed beveled edge on the support legs by a camming action. In this camming manne…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.