04225989 is referenced by 162 patents and cites 12 patents.

A ripple bed has an upper and a lower inflatable layer. The upper layer has separate air passages which are independently inflatable and deflatable to provide the rippling effect. The lower layer is separately inflatable to provide support over any area of the upper layer which is deflated.

Title
Inflatable supports
Application Number
5/948798
Publication Number
4225989
Application Date
October 5, 1978
Publication Date
October 7, 1980
Inventor
Ronald J Clark
Sidmouth
GB
Siu L Ho
Coventry
GB
Aubrey E Corbett
Kenilworth
GB
Agent
Larson Taylor and Hinds
Assignee
Glynwed Group Services
GB
IPC
A47C 27/10
A61G 7/04
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