Water bed has mattress made up of separate chambers, head and foot sections containing large number of small chambers and central section a few large chambers

摘要

The water bed has a mattress (1) which is made up of separate chambers (3, 4). The head and foot sections are made up of a large number of small chambers (3) and the central section of a few large chambers (4). The height of the head and foot sections can be adjusted by moving corresponding sections of the bed frame.