Diffusion pumping apparatus self-inflating device

Details Diffusion pumping apparatus self-inflating device Diffusion pumping apparatus self-inflating device

1980-07-10

1982-07-20

Cannon, James C.

Stock material or miscellaneous articles

Hollow or container type article

Cellular material derived from plant or animal source

2413, 5441, 5442, 5449, 5450, 5455, 36 29, 36 35B, 36 43, 36 44, 52 2, 152330R, 273 61A, 273 61D, 273 65R, 428 69, 428 72, 428158, 428166, 428178, 441 30, 441 40, A43B 1320, B32B 106, E04B 134, E04G 1104

Patent

active

043406262

ABSTRACT:
An elastomeric enclosure is initially inflated to a desired pressure by a gas having large molecules incapable of diffusing outwardly from the enclosure, except at a relatively slow rate. When the enclosure is surrounded by ambient air at atmospheric pressure, such air passes into the enclosures by reverse diffusion, thus extracting energy from the ambient sea of air to progressively increase the total pressure in the enclosure to a substantial extent over a period of several months, the pressure then decreasing very slowly over an extended period to its initial inflation pressure, such extended period being as much as about two years or more. This added energy may be used to perform useful work or used in various pneumatic devices to achieve essentially permanent inflation. Decrease in pressure below the initial inflation value continues at a very slow rate over an additional period of many months, and, in fact, several years, with the inflation pressure still remaining at a sufficiently high value which enables the inflated enclosures to still possess a useful life.

REFERENCES:
patent: 2997291 (1961-08-01), Stultz

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