Light-weight base for a bed
A light-weight base for a bed is described which includes a mattress-supporting platform (4) supported on a frame (1) of opposed ribs (2) in which the platform (4) is formed from an array of resiliently depressible crested thermoplastics bridges (5) which act as springs and which extend between pairs of opposed ribs (2) and their crests rise above the tops of ribs (2). Bridges (5) may be conveniently injection molded from crystalline polypropylene or propylene/ethylene copolymer in sections 0.5 to 5 mm thick and are preferably integral with fixing means (6) which make push fits into ribs (2). The polypropylene bridges have good resistance to flexing fatigue, are light-weight and, when provided with integral fixing means, are easily assembled on frame (1). These modified bases may be used as seat or back portions of chairs as well.
Type: Grant
Filed: Mar 5, 1980
Date of Patent: Feb 2, 1982
Inventor: James D. Robinson (Welwyn Garden City, Hertfordshire)
Application Number: 6/127,303
