04936029 is referenced by 259 patents and cites 3 patents.

A product in the form of a cushioning device made from thermoplastic film containing crystalline material inflated to a relatively high pressure and sealed at the time of manufacture. The product maintains the internal inflatant pressure for long periods of time by employing a form of the diffusion pumping phenomenon of self-inflation in which the mobile gas is the gas components of air other than nitrogen. Improved and novel cushioning devices use new materials, for the film of the enclosure envelope which can selectively control the rate of diffusion pumping, thereby permitting a wider latitude flexibility and greater accuracy in the design of such new cushioning device, thus improving the performance and reducing cost of such devices while eliminating some of the disadvantages of the earlier products. It is possible to permanently inflate certain types of new devices using readily available gases such as nitrogen, or air in which case nitrogen forms the captive gas.

Title
Load carrying cushioning device with improved barrier material for control of diffusion pumping
Application Number
7/298899
Publication Number
4936029
Application Date
January 19, 1989
Publication Date
June 26, 1990
Inventor
Marion F Rudy
Northridge
CA, US
Agent
Beehler & Pavitt
Assignee
R C Bogert
CA, US
IPC
A61F 05/14
A43B 13/18
View Original Source