Lighter-than-air apparatus and method of utilizing same

Details Lighter-than-air apparatus and method of utilizing same Lighter-than-air apparatus and method of utilizing same

1977-05-16

1978-09-12

Kelmachter, Barry L.

Aeronautics and astronautics

Aircraft, lighter-than-air

Balloons

244125, 244126, B64B 140

Patent

active

041132068

ABSTRACT:
Lighter-than-air apparatus includes a thin, pliable air-tight outer envelope disposed in overlying relationship over a light-weight, coarse-opening inner frame of a spherelike shape. The envelope includes a sealable opening therein, so that the envelope can be at least partially evacuated to render the apparatus lighter than air. A vacuum pump is provided and is connected in fluid communication with the opening for controlling the quantity of air contained in the envelope to determine the amount of lifting energy. In one form of the invention, an outer frame is disposed within the envelope and surrounding the inner frame, and the outer frame is composed of a stiff, rigid open-mesh material with the openings in the inner frame being smaller in size than the opening in the outer frame.

REFERENCES:
patent: 205319 (1878-06-01), Tracy
patent: 1390745 (1921-09-01), Armstrong
patent: 1553087 (1925-09-01), Lehmann
patent: 2767941 (1956-10-01), Gegner et al.
patent: 3182932 (1965-05-01), Winker
patent: 3311328 (1967-03-01), Slater

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